$ALLY
Ally Financial Inc. Stock $ally

$ally Overview Financials Valuation SEC Filings Company Website

2016 Form 10-K Financial Statement

#000004072917000067 Filed on February 27, 2017

Income Statement

Concept	2016	2015 Q4	2015 Q3
Revenue	$5.437B	$1.339B	$1.302B
YoY Change	11.85%	32.05%	3.01%
Cost Of Revenue	$342.0M		$61.00M
YoY Change	16.72%		-37.11%
Gross Profit	$5.095B		$1.241B
YoY Change	11.54%		6.34%
Gross Profit Margin	93.71%		95.31%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development	$274.0M		$65.00M
YoY Change	2.62%		-15.58%
% of Gross Profit	5.38%		5.24%
Depreciation & Amortization	$2.382B	$671.0M	$664.0M
YoY Change	-14.96%	-16.44%	-7.52%
% of Gross Profit	46.75%		53.51%
Operating Expenses	$274.0M		$65.00M
YoY Change	2.62%		-15.58%
Operating Profit	$4.821B		$1.176B
YoY Change	12.09%		7.89%
Interest Expense	$2.629B		$604.0M
YoY Change	8.23%		-9.99%
% of Operating Profit	54.53%		51.36%
Other Income/Expense, Net	$1.530B	$356.0M	$332.0M
YoY Change	33.98%
Pretax Income	$1.581B	$431.0M	$417.0M
YoY Change	13.5%	130.48%	-0.71%
Income Tax	$470.0M	$155.0M	$144.0M
% Of Pretax Income	29.73%	35.96%	34.53%
Net Earnings	$1.067B	$263.0M	$268.0M
YoY Change	-17.22%	48.59%	-36.64%
Net Earnings / Revenue	19.62%	19.64%	20.58%
Basic Earnings Per Share	$2.15	-$1.97	$0.48
Diluted Earnings Per Share	$2.15	-$1.97	$0.47
COMMON SHARES
Basic Shares Outstanding	481.1M shares	481.8M shares	483.1M shares
Diluted Shares Outstanding	482.2M shares		484.4M shares

Balance Sheet

Concept	2016	2015 Q4	2015 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents		$6.380B	$5.227B
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$11.85B	$235.0M	$212.0M
YoY Change	-28.23%	4.44%	-5.78%
Goodwill		$27.00M
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$994.0M	$1.369B	$1.459B
YoY Change	-27.39%	-44.03%	-38.98%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$163.7B	$158.6B	$155.9B
YoY Change	3.25%	4.58%	4.5%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$1.000B	$741.0M	$924.0M
YoY Change	34.95%	-4.39%	5.6%
Accrued Expenses	$447.0M	$746.0M	$720.0M
YoY Change	-25.62%	-23.88%	-10.0%
Deferred Revenue
YoY Change
Short-Term Debt	$4.798B	$8.101B	$5.378B
YoY Change	17.0%	14.71%	2.34%
Long-Term Debt Due		$11.26B	$13.41B
YoY Change		-35.25%	-26.98%
Total Short-Term Liabilities	$1.447B	$1.487B	$1.644B
YoY Change	7.82%	-15.27%	-1.85%
LONG-TERM LIABILITIES
Long-Term Debt	$54.13B	$54.65B	$53.60B
YoY Change	-18.28%	12.57%	10.49%
Other Long-Term Liabilities	$3.141B	$2.842B	$2.982B
YoY Change	5.16%	0.35%	1.95%
Total Long-Term Liabilities	$57.27B	$54.65B	$53.60B
YoY Change	-17.27%	12.57%	10.49%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.447B	$1.487B	$1.644B
Total Long-Term Liabilities	$57.27B	$54.65B	$53.60B
Total Liabilities	$150.4B	$145.1B	$141.5B
YoY Change	3.63%	6.54%	5.6%
SHAREHOLDERS EQUITY
Retained Earnings		-$8.110B	-$7.158B
YoY Change		18.78%	3.19%
Common Stock
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)		$16.00M	$16.00M
YoY Change
Treasury Stock Shares		811.0K shares	802.5K shares
Shareholders Equity	$13.32B	$13.44B	$14.60B
YoY Change
Total Liabilities & Shareholders Equity	$163.7B	$158.6B	$156.1B
YoY Change	3.25%	4.58%	4.63%

Cashflow Statement

Concept	2016	2015 Q4	2015 Q3
OPERATING ACTIVITIES
Net Income	$1.067B	$263.0M	$268.0M
YoY Change	-17.22%	48.59%	-36.64%
Depreciation, Depletion And Amortization	$2.382B	$671.0M	$664.0M
YoY Change	-14.96%	-16.44%	-7.52%
Cash From Operating Activities	$4.567B	$1.141B	$2.227B
YoY Change	-10.64%	20.74%	135.66%
INVESTING ACTIVITIES
Capital Expenditures	-$3.274B	-$1.262B	-$1.075B
YoY Change	-30.12%	-40.3%	-58.46%
Acquisitions
YoY Change
Other Investing Activities	$306.0M	-$1.722B	-$752.0M
YoY Change	-10300.0%	56.12%	-130.04%
Cash From Investing Activities	-$9.070B	-$2.984B	-$1.827B
YoY Change	-9.33%	-7.24%	2049.41%
FINANCING ACTIVITIES
Cash Dividend Paid	$108.0M
YoY Change	-95.8%
Common Stock Issuance & Retirement, Net	$341.0M
YoY Change	2031.25%
Debt Paid & Issued, Net	$26.41B
YoY Change	-15.75%
Cash From Financing Activities	$3.670B	2.741B	-1.029B
YoY Change	-32.59%	27.55%	9.82%
NET CHANGE
Cash From Operating Activities	$4.567B	1.141B	2.227B
Cash From Investing Activities	-$9.070B	-2.984B	-1.827B
Cash From Financing Activities	$3.670B	2.741B	-1.029B
Net Change In Cash	-$832.0M	898.0M	-629.0M
YoY Change	-251.82%	-830.08%	716.88%
FREE CASH FLOW
Cash From Operating Activities	$4.567B	$1.141B	$2.227B
Capital Expenditures	-$3.274B	-$1.262B	-$1.075B
Free Cash Flow	$7.841B	$2.403B	$3.302B
YoY Change	-19.96%	-21.44%	-6.54%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2014	ally	Availableforsale Securities Gross Realized Gain Loss Excluding Otti Including Disc Ops AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOttiIncludingDiscOps	-181000000	USD
CY2016Q4	ally	Allyhastherighttodeferpaymentsofinterestforaperiodnotexceedingconsecutivequartersof Allyhastherighttodeferpaymentsofinterestforaperiodnotexceedingconsecutivequartersof	20
CY2016Q4	ally	Assets Greater Than50 Billion AssetsGreaterThan50Billion	50000000000	USD
CY2015Q4	ally	Assets Of Nonconsolidated Variable Interest Entities AssetsOfNonconsolidatedVariableInterestEntities	3034000000	USD
CY2016Q4	ally	Assets Of Nonconsolidated Variable Interest Entities AssetsOfNonconsolidatedVariableInterestEntities	2899000000	USD
CY2015Q4	ally	Available For Sale Equity Investment In Any One Industry Did Not Exceed Percentage AvailableForSaleEquityInvestmentInAnyOneIndustryDidNotExceedPercentage	0.14
CY2015	ally	Availableforsale Securities Gross Realized Gain Loss Excluding Otti Including Disc Ops AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOttiIncludingDiscOps	-155000000	USD
CY2016	ally	Availableforsale Securities Gross Realized Gain Loss Excluding Otti Including Disc Ops AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOttiIncludingDiscOps	-185000000	USD
CY2016Q2	ally	Business Acquisition Cash Paid BusinessAcquisitionCashPaid	298000000	USD
CY2016Q3	ally	Business Acquisition Cash Paid BusinessAcquisitionCashPaid	28000000	USD
CY2014	ally	Capital Contributions From Parent CapitalContributionsFromParent	0	USD
CY2015	ally	Capital Contributions From Parent CapitalContributionsFromParent	0	USD
CY2016	ally	Capital Contributions From Parent CapitalContributionsFromParent	0	USD
CY2015Q4	ally	Carryingvalueofassetsfor Vi Esforwhichwehavecontinuinginvolvement CarryingvalueofassetsforVIEsforwhichwehavecontinuinginvolvement	44940000000	USD
CY2016Q4	ally	Carryingvalueofassetsfor Vi Esforwhichwehavecontinuinginvolvement CarryingvalueofassetsforVIEsforwhichwehavecontinuinginvolvement	37631000000	USD
CY2015Q4	ally	Carryingvalueofliabilitiesfor Vi Esforwhichwehavecontinuinginvolvement CarryingvalueofliabilitiesforVIEsforwhichwehavecontinuinginvolvement	20388000000	USD
CY2016Q4	ally	Carryingvalueofliabilitiesfor Vi Esforwhichwehavecontinuinginvolvement CarryingvalueofliabilitiesforVIEsforwhichwehavecontinuinginvolvement	13490000000	USD
CY2015Q4	ally	Cash And Securities Collateral Placed With Counterparties CashAndSecuritiesCollateralPlacedWithCounterparties	125000000	USD
CY2016Q4	ally	Cash And Securities Collateral Placed With Counterparties CashAndSecuritiesCollateralPlacedWithCounterparties	167000000	USD
CY2015Q4	ally	Cash Collateral Placedwith Counterparties Excluding Cash Collateral Associatedwith Repurchase Agreements CashCollateralPlacedwithCounterpartiesExcludingCashCollateralAssociatedwithRepurchaseAgreements	103000000	USD
CY2016Q4	ally	Cash Collateral Placedwith Counterparties Excluding Cash Collateral Associatedwith Repurchase Agreements CashCollateralPlacedwithCounterpartiesExcludingCashCollateralAssociatedwithRepurchaseAgreements	122000000	USD
CY2015Q4	ally	Cash Collateral Received From Counterparties CashCollateralReceivedFromCounterparties	82000000	USD
CY2016Q4	ally	Cash Collateral Received From Counterparties CashCollateralReceivedFromCounterparties	10000000	USD
CY2015Q4	ally	Cash Collateral Receivedfrom Counterparties Excluding Collateral Associatedwith Repurchase Agreements CashCollateralReceivedfromCounterpartiesExcludingCollateralAssociatedwithRepurchaseAgreements	82000000	USD
CY2016Q4	ally	Cash Collateral Receivedfrom Counterparties Excluding Collateral Associatedwith Repurchase Agreements CashCollateralReceivedfromCounterpartiesExcludingCollateralAssociatedwithRepurchaseAgreements	10000000	USD
CY2015Q4	ally	Cash Reserve Deposits Held For Securitization Trusts CashReserveDepositsHeldForSecuritizationTrusts	252000000	USD
CY2016Q4	ally	Cash Reserve Deposits Held For Securitization Trusts CashReserveDepositsHeldForSecuritizationTrusts	184000000	USD
CY2015Q4	ally	Commercial Concentration Risk CommercialConcentrationRisk	1.000
CY2016Q4	ally	Commercial Concentration Risk CommercialConcentrationRisk	1.000
CY2015Q4	ally	Commercial Criticized Finance Receivablesand Loans CommercialCriticizedFinanceReceivablesandLoans	1.000
CY2016Q4	ally	Commercial Criticized Finance Receivablesand Loans CommercialCriticizedFinanceReceivablesandLoans	1.000
CY2015Q4	ally	Commitmenttofundremainingunusedbalancesonhomeequitylinesofcredit Commitmenttofundremainingunusedbalancesonhomeequitylinesofcredit	358000000	USD
CY2016Q4	ally	Commitmenttofundremainingunusedbalancesonhomeequitylinesofcredit Commitmenttofundremainingunusedbalancesonhomeequitylinesofcredit	356000000	USD
CY2015Q4	ally	Commitmenttoprovidecapitaltoinvestees Commitmenttoprovidecapitaltoinvestees	132000000	USD
CY2016Q4	ally	Commitmenttoprovidecapitaltoinvestees Commitmenttoprovidecapitaltoinvestees	206000000	USD
CY2016Q4	ally	Common Equity Tier1 Capital Requiredfor Capital Adequacyto Riskweighted Assets CommonEquityTier1CapitalRequiredforCapitalAdequacytoRiskweightedAssets	0.0450
CY2016Q4	ally	Commonequity Tier1capitalconservationbuffer CommonequityTier1capitalconservationbuffer	0.0250
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CY2016Q4	ally	Debt Payable To Bank Subsidiaries DebtPayableToBankSubsidiaries	0	USD
CY2015Q4	ally	Debt Payable To Nonbank Subsidiaries DebtPayableToNonbankSubsidiaries	0	USD
CY2016Q4	ally	Debt Payable To Nonbank Subsidiaries DebtPayableToNonbankSubsidiaries	0	USD
CY2016Q4	ally	Deferred Tax Assets Gross Netof Deferred Tax Liabilities DeferredTaxAssetsGrossNetofDeferredTaxLiabilities	1622000000	USD
CY2016Q4	ally	Deferred Tax Assets Gross Valuation Allowance DeferredTaxAssetsGrossValuationAllowance	646000000	USD
CY2015Q4	ally	Deferred Tax Assets Net Inclusiveof Deferred Tax Liabilities DeferredTaxAssetsNetInclusiveofDeferredTaxLiabilities	1359000000	USD
CY2016Q4	ally	Deferred Tax Assets Net Inclusiveof Deferred Tax Liabilities DeferredTaxAssetsNetInclusiveofDeferredTaxLiabilities	976000000	USD
CY2016Q4	ally	Deferred Tax Assets Other Non Attribute DeferredTaxAssetsOtherNonAttribute	978000000	USD
CY2016Q4	ally	Deferred Tax Assets Stateand Local Tax Carryforwards DeferredTaxAssetsStateandLocalTaxCarryforwards	1138000000	USD
CY2015Q4	ally	Deferred Tax Assets Stateandlocaltaxes DeferredTaxAssetsStateandlocaltaxes	194000000	USD
CY2016Q4	ally	Deferred Tax Assets Stateandlocaltaxes DeferredTaxAssetsStateandlocaltaxes	162000000	USD
CY2015Q4	ally	Deferred Tax Assets Tax Loss Carryforward DeferredTaxAssetsTaxLossCarryforward	950000000	USD
CY2016Q4	ally	Deferred Tax Assets Tax Loss Carryforward DeferredTaxAssetsTaxLossCarryforward	936000000	USD
CY2016Q4	ally	Deferred Tax Liabilities Gross Valuation Allowance DeferredTaxLiabilitiesGrossValuationAllowance	0	USD
CY2015Q4	ally	Deferredtaxliabilitiesdeferredexpensedeferredacquisitioncost Deferredtaxliabilitiesdeferredexpensedeferredacquisitioncost	403000000	USD
CY2016Q4	ally	Deferredtaxliabilitiesdeferredexpensedeferredacquisitioncost Deferredtaxliabilitiesdeferredexpensedeferredacquisitioncost	424000000	USD
CY2015Q4	ally	Demand Notes DemandNotes	3369000000	USD
CY2016Q4	ally	Demand Notes DemandNotes	3622000000	USD
CY2014	ally	Depreciation Expense On Operating Lease Assets DepreciationExpenseOnOperatingLeaseAssets	2666000000	USD
CY2015	ally	Depreciation Expense On Operating Lease Assets DepreciationExpenseOnOperatingLeaseAssets	2600000000	USD
CY2016	ally	Depreciation Expense On Operating Lease Assets DepreciationExpenseOnOperatingLeaseAssets	1982000000	USD
CY2016Q4	ally	Derivative Instrument Converting Fixedrate Debtinto Variablerate Obligations DerivativeInstrumentConvertingFixedrateDebtintoVariablerateObligations	2100000000	USD
CY2016Q4	ally	Derivative Instrument Converting Variablerate Debtinto Fixedrate Obligations DerivativeInstrumentConvertingVariablerateDebtintoFixedrateObligations	132000000	USD
CY2014	ally	Disposals Of Operating Lease Assets DisposalsOfOperatingLeaseAssets	5860000000	USD
CY2015	ally	Disposals Of Operating Lease Assets DisposalsOfOperatingLeaseAssets	5546000000	USD
CY2016	ally	Disposals Of Operating Lease Assets DisposalsOfOperatingLeaseAssets	6304000000	USD
CY2014	ally	Dividends From Non Bank Subsidiary DividendsFromNonBankSubsidiary	0	USD
CY2015	ally	Dividends From Non Bank Subsidiary DividendsFromNonBankSubsidiary	0	USD
CY2016	ally	Dividends From Non Bank Subsidiary DividendsFromNonBankSubsidiary	0	USD
CY2014	ally	Dividends Paid And Returns Of Contributed Capital Intercompany DividendsPaidAndReturnsOfContributedCapitalIntercompany	0	USD
CY2015	ally	Dividends Paid And Returns Of Contributed Capital Intercompany DividendsPaidAndReturnsOfContributedCapitalIntercompany	0	USD
CY2016	ally	Dividends Paid And Returns Of Contributed Capital Intercompany DividendsPaidAndReturnsOfContributedCapitalIntercompany	0	USD
CY2014	ally	Dividendsfrom Bank Subsidiary DividendsfromBankSubsidiary	0	USD
CY2015	ally	Dividendsfrom Bank Subsidiary DividendsfromBankSubsidiary	0	USD
CY2014	ally	Effective Income Tax Rate Reconciliation Changein Unrecognized Tax Benefits EffectiveIncomeTaxRateReconciliationChangeinUnrecognizedTaxBenefits	-63000000	USD
CY2015	ally	Effective Income Tax Rate Reconciliation Changein Unrecognized Tax Benefits EffectiveIncomeTaxRateReconciliationChangeinUnrecognizedTaxBenefits	-5000000	USD
CY2016	ally	Effective Income Tax Rate Reconciliation Changein Unrecognized Tax Benefits EffectiveIncomeTaxRateReconciliationChangeinUnrecognizedTaxBenefits	-161000000	USD
CY2014	ally	Effective Income Tax Reconciliation Foreign Capital Loss EffectiveIncomeTaxReconciliationForeignCapitalLoss	-27000000	USD
CY2015	ally	Effective Income Tax Reconciliation Foreign Capital Loss EffectiveIncomeTaxReconciliationForeignCapitalLoss	-13000000	USD
CY2016	ally	Effective Income Tax Reconciliation Foreign Capital Loss EffectiveIncomeTaxReconciliationForeignCapitalLoss	-15000000	USD
CY2015	ally	Financing Receivable Significant Salesand Transfers FinancingReceivableSignificantSalesandTransfers	1317000000	USD
CY2016	ally	Financing Receivable Significant Salesand Transfers FinancingReceivableSignificantSalesandTransfers	4311000000	USD
CY2016Q4	ally	Fromandincluding February152016tobutexcluding February152040distributionswillbepayableatanannualrateequaltothreemonth Londoninterbankofferrateplus FromandincludingFebruary152016tobutexcludingFebruary152040distributionswillbepayableatanannualrateequaltothreemonthLondoninterbankofferrateplus	0.0579
CY2014	ally	Gain Loss On Sales Of Loans Net Including Discontinued Operations GainLossOnSalesOfLoansNetIncludingDiscontinuedOperations	7000000	USD
CY2015	ally	Gain Loss On Sales Of Loans Net Including Discontinued Operations GainLossOnSalesOfLoansNetIncludingDiscontinuedOperations	45000000	USD
CY2016	ally	Gain Loss On Sales Of Loans Net Including Discontinued Operations GainLossOnSalesOfLoansNetIncludingDiscontinuedOperations	11000000	USD
CY2015Q4	ally	Gross Amounts Offsetinthe Condensed Consolidated Balance Sheet GrossAmountsOffsetintheCondensedConsolidatedBalanceSheet	0	USD
CY2016Q4	ally	Gross Amounts Offsetinthe Condensed Consolidated Balance Sheet GrossAmountsOffsetintheCondensedConsolidatedBalanceSheet	0	USD
CY2014	ally	Gross Insurance Premiums Earned GrossInsurancePremiumsEarned	336000000	USD
CY2015	ally	Gross Insurance Premiums Earned GrossInsurancePremiumsEarned	312000000	USD
CY2016	ally	Gross Insurance Premiums Earned GrossInsurancePremiumsEarned	323000000	USD
CY2014	ally	Gross Remarketing Gains Losses GrossRemarketingGainsLosses	433000000	USD
CY2015	ally	Gross Remarketing Gains Losses GrossRemarketingGainsLosses	351000000	USD
CY2016	ally	Gross Remarketing Gains Losses GrossRemarketingGainsLosses	213000000	USD
CY2016Q4	ally	Heldto Maturity Debt Securities Due After Five Years Through Ten Years Yield HeldtoMaturityDebtSecuritiesDueAfterFiveYearsThroughTenYearsYield	0.000
CY2016Q4	ally	Heldto Maturity Debt Securities Due After One Year Through Five Years Yield HeldtoMaturityDebtSecuritiesDueAfterOneYearThroughFiveYearsYield	0.000
CY2016Q4	ally	Heldto Maturity Debt Securities Duein One Yearor Less Yield HeldtoMaturityDebtSecuritiesDueinOneYearorLessYield	0.000
CY2016Q4	ally	Heldto Maturity Debt Securities Yield HeldtoMaturityDebtSecuritiesYield	0.029
CY2016Q4	ally	Heldto Maturity Securities Due After Ten Years Yield HeldtoMaturitySecuritiesDueAfterTenYearsYield	0.029
CY2014Q4	ally	Identifiable Assets IdentifiableAssets	151604000000	USD
CY2015Q4	ally	Identifiable Assets IdentifiableAssets	158554000000	USD
CY2016Q4	ally	Identifiable Assets IdentifiableAssets	163488000000	USD
CY2014	ally	Increase Decreasein Nonmarketableequitysecurities IncreaseDecreaseinNonmarketableequitysecurities	-66000000	USD
CY2015	ally	Increase Decreasein Nonmarketableequitysecurities IncreaseDecreaseinNonmarketableequitysecurities	147000000	USD
CY2016	ally	Increase Decreasein Nonmarketableequitysecurities IncreaseDecreaseinNonmarketableequitysecurities	628000000	USD
CY2014	ally	Insurance Commissionsand Fees Written InsuranceCommissionsandFeesWritten	842000000	USD
CY2015	ally	Insurance Commissionsand Fees Written InsuranceCommissionsandFeesWritten	846000000	USD
CY2016	ally	Insurance Commissionsand Fees Written InsuranceCommissionsandFeesWritten	826000000	USD
CY2014	ally	Insurance Services Revenue Written InsuranceServicesRevenueWritten	1023000000	USD
CY2015	ally	Insurance Services Revenue Written InsuranceServicesRevenueWritten	977000000	USD
CY2016	ally	Insurance Services Revenue Written InsuranceServicesRevenueWritten	948000000	USD
CY2014	ally	Interest And Dividends Exempt From Us Federal Income Tax InterestAndDividendsExemptFromUSFederalIncomeTax	11000000	USD
CY2015	ally	Interest And Dividends Exempt From Us Federal Income Tax InterestAndDividendsExemptFromUSFederalIncomeTax	18000000	USD
CY2016	ally	Interest And Dividends Exempt From Us Federal Income Tax InterestAndDividendsExemptFromUSFederalIncomeTax	19000000	USD
CY2015Q4	ally	Investment In Bank Subsidiaries InvestmentInBankSubsidiaries	0	USD
CY2016Q4	ally	Investment In Bank Subsidiaries InvestmentInBankSubsidiaries	0	USD
CY2015Q4	ally	Investment In Nonbank Subsidiaries InvestmentInNonbankSubsidiaries	0	USD
CY2016Q4	ally	Investment In Nonbank Subsidiaries InvestmentInNonbankSubsidiaries	0	USD
CY2014	ally	Lease And Loan Administration LeaseAndLoanAdministration	122000000	USD
CY2015	ally	Lease And Loan Administration LeaseAndLoanAdministration	126000000	USD
CY2016	ally	Lease And Loan Administration LeaseAndLoanAdministration	136000000	USD
CY2015Q4	ally	Loans And Leases Receivable From Bank Subsidiary LoansAndLeasesReceivableFromBankSubsidiary	0	USD
CY2016Q4	ally	Loans And Leases Receivable From Bank Subsidiary LoansAndLeasesReceivableFromBankSubsidiary	0	USD
CY2015Q4	ally	Loans And Leases Receivable From Nonbank Subsidiary LoansAndLeasesReceivableFromNonbankSubsidiary	0	USD
CY2016Q4	ally	Loans And Leases Receivable From Nonbank Subsidiary LoansAndLeasesReceivableFromNonbankSubsidiary	0	USD
CY2014	ally	Net Change In Debt Intercompany NetChangeInDebtIntercompany	0	USD
CY2015	ally	Net Change In Debt Intercompany NetChangeInDebtIntercompany	0	USD
CY2016	ally	Net Change In Debt Intercompany NetChangeInDebtIntercompany	0	USD
CY2016Q4	ally	Net Deferred Tax Assets Other Non Attribute NetDeferredTaxAssetsOtherNonAttribute	945000000	USD
CY2016Q4	ally	Net Deferred Tax Assets Stateand Local Tax Carryforwards NetDeferredTaxAssetsStateandLocalTaxCarryforwards	1010000000	USD
CY2016Q4	ally	Net Deferred Tax Assets Tax Credit Carryforwards NetDeferredTaxAssetsTaxCreditCarryforwards	1502000000	USD
CY2014	ally	Net Financing Revenue NetFinancingRevenue	3375000000	USD
CY2015Q1	ally	Net Financing Revenue NetFinancingRevenue	850000000	USD
CY2015Q2	ally	Net Financing Revenue NetFinancingRevenue	916000000	USD
CY2015Q3	ally	Net Financing Revenue NetFinancingRevenue	970000000	USD
CY2015Q4	ally	Net Financing Revenue NetFinancingRevenue	983000000	USD
CY2015	ally	Net Financing Revenue NetFinancingRevenue	3719000000	USD
CY2016Q1	ally	Net Financing Revenue NetFinancingRevenue	951000000	USD
CY2016Q2	ally	Net Financing Revenue NetFinancingRevenue	984000000	USD
CY2016Q3	ally	Net Financing Revenue NetFinancingRevenue	996000000	USD
CY2016Q4	ally	Net Financing Revenue NetFinancingRevenue	976000000	USD
CY2016	ally	Net Financing Revenue NetFinancingRevenue	3907000000	USD
CY2014	ally	Net Income Loss From Continuing Operations Attributable To Common Shareholders NetIncomeLossFromContinuingOperationsAttributableToCommonShareholders	657000000	USD
CY2015	ally	Net Income Loss From Continuing Operations Attributable To Common Shareholders NetIncomeLossFromContinuingOperationsAttributableToCommonShareholders	-1674000000	USD
CY2016	ally	Net Income Loss From Continuing Operations Attributable To Common Shareholders NetIncomeLossFromContinuingOperationsAttributableToCommonShareholders	1081000000	USD
CY2015Q4	ally	Non Us Dept Of Treasury Held Preferred Stock And Apic NonUSDeptOfTreasuryHeldPreferredStockAndApic	696000000	USD
CY2016Q4	ally	Non Us Dept Of Treasury Held Preferred Stock And Apic NonUSDeptOfTreasuryHeldPreferredStockAndApic	0	USD
CY2015Q4	ally	Noncash Collateral Received NoncashCollateralReceived	7000000	USD
CY2016Q4	ally	Noncash Collateral Received NoncashCollateralReceived	6000000	USD
CY2015Q4	ally	Nonderivative Cash Collateral Placedwith Counterparties Associatedwiththe Repurchase Agreements NonderivativeCashCollateralPlacedwithCounterpartiesAssociatedwiththeRepurchaseAgreements	21000000	USD
CY2016Q4	ally	Nonderivative Cash Collateral Placedwith Counterparties Associatedwiththe Repurchase Agreements NonderivativeCashCollateralPlacedwithCounterpartiesAssociatedwiththeRepurchaseAgreements	45000000	USD
CY2015Q4	ally	Nonmarketableequitysecurities Nonmarketableequitysecurities	418000000	USD
CY2016Q4	ally	Nonmarketableequitysecurities Nonmarketableequitysecurities	1046000000	USD
CY2014	ally	Originationsandrepaymentsofloansheldforinvestmentandother Originationsandrepaymentsofloansheldforinvestmentandother	4147000000	USD
CY2015	ally	Originationsandrepaymentsofloansheldforinvestmentandother Originationsandrepaymentsofloansheldforinvestmentandother	9344000000	USD
CY2016	ally	Originationsandrepaymentsofloansheldforinvestmentandother Originationsandrepaymentsofloansheldforinvestmentandother	8826000000	USD
CY2014	ally	Other Comprehensive Income Loss Foreign Currency Translation Adjustmentsand Net Investment Hedges Netof Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentsandNetInvestmentHedgesNetofTax	-29000000	USD
CY2015	ally	Other Comprehensive Income Loss Foreign Currency Translation Adjustmentsand Net Investment Hedges Netof Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentsandNetInvestmentHedgesNetofTax	-27000000	USD
CY2016	ally	Other Comprehensive Income Loss Foreign Currency Translation Adjustmentsand Net Investment Hedges Netof Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentsandNetInvestmentHedgesNetofTax	5000000	USD
CY2015	ally	Other Comprehensive Income Loss Net Investment Hedges Attributable To Parent Before Tax OtherComprehensiveIncomeLossNetInvestmentHedgesAttributableToParentBeforeTax	33000000	USD
CY2014	ally	Other Comprehensive Income Loss Net Investment Hedges Attributable To Parent Net Of Tax OtherComprehensiveIncomeLossNetInvestmentHedgesAttributableToParentNetOfTax	8000000	USD
CY2015	ally	Other Comprehensive Income Loss Net Investment Hedges Attributable To Parent Net Of Tax OtherComprehensiveIncomeLossNetInvestmentHedgesAttributableToParentNetOfTax	21000000	USD
CY2016	ally	Other Comprehensive Income Loss Net Investment Hedges Attributable To Parent Net Of Tax OtherComprehensiveIncomeLossNetInvestmentHedgesAttributableToParentNetOfTax	1000000	USD
CY2015	ally	Other Comprehensive Income Loss Net Investment Hedges Attributable To Parent Tax OtherComprehensiveIncomeLossNetInvestmentHedgesAttributableToParentTax	12000000	USD
CY2015	ally	Other Comprehensive Income Loss Reclassification Adjustment For Net Investment Hedges Included In Net Income Discontinued Operation Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForNetInvestmentHedgesIncludedInNetIncomeDiscontinuedOperationBeforeTax	-4000000	USD
CY2014	ally	Other Comprehensive Income Loss Reclassification Adjustment For Net Investment Hedges Included In Net Income Discontinued Operation Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForNetInvestmentHedgesIncludedInNetIncomeDiscontinuedOperationNetOfTax	0	USD
CY2015	ally	Other Comprehensive Income Loss Reclassification Adjustment For Net Investment Hedges Included In Net Income Discontinued Operation Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForNetInvestmentHedgesIncludedInNetIncomeDiscontinuedOperationNetOfTax	-3000000	USD
CY2016	ally	Other Comprehensive Income Loss Reclassification Adjustment For Net Investment Hedges Included In Net Income Discontinued Operation Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForNetInvestmentHedgesIncludedInNetIncomeDiscontinuedOperationNetOfTax	0	USD
CY2015	ally	Other Comprehensive Income Loss Reclassification Adjustment For Net Investment Hedges Included In Net Income Discontinued Operation Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForNetInvestmentHedgesIncludedInNetIncomeDiscontinuedOperationTax	-1000000	USD
CY2014	ally	Other Comprehensive Income Loss Reclassification Adjustmentto Net Income Pensionand Other Postretirement Benefit Plansfor Net Gain Loss Netof Tax OtherComprehensiveIncomeLossReclassificationAdjustmenttoNetIncomePensionandOtherPostretirementBenefitPlansforNetGainLossNetofTax	4000000	USD
CY2015	ally	Other Comprehensive Income Loss Reclassification Adjustmentto Net Income Pensionand Other Postretirement Benefit Plansfor Net Gain Loss Netof Tax OtherComprehensiveIncomeLossReclassificationAdjustmenttoNetIncomePensionandOtherPostretirementBenefitPlansforNetGainLossNetofTax	-1000000	USD
CY2016	ally	Other Comprehensive Income Loss Reclassification Adjustmentto Net Income Pensionand Other Postretirement Benefit Plansfor Net Gain Loss Netof Tax OtherComprehensiveIncomeLossReclassificationAdjustmenttoNetIncomePensionandOtherPostretirementBenefitPlansforNetGainLossNetofTax	2000000	USD
CY2014	ally	Other Comprehensive Income Loss Reclassification Adjustmentto Net Incomefor Saleof Securities Netof Tax OtherComprehensiveIncomeLossReclassificationAdjustmenttoNetIncomeforSaleofSecuritiesNetofTax	167000000	USD
CY2015	ally	Other Comprehensive Income Loss Reclassification Adjustmentto Net Incomefor Saleof Securities Netof Tax OtherComprehensiveIncomeLossReclassificationAdjustmenttoNetIncomeforSaleofSecuritiesNetofTax	99000000	USD
CY2016	ally	Other Comprehensive Income Loss Reclassification Adjustmentto Net Incomefor Saleof Securities Netof Tax OtherComprehensiveIncomeLossReclassificationAdjustmenttoNetIncomeforSaleofSecuritiesNetofTax	147000000	USD
CY2014	ally	Other Comprehensive Income Unrealized Gain Loss On Net Investment Hedges Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnNetInvestmentHedgesArisingDuringPeriodBeforeTax	13000000	USD
CY2015	ally	Other Comprehensive Income Unrealized Gain Loss On Net Investment Hedges Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnNetInvestmentHedgesArisingDuringPeriodBeforeTax	29000000	USD
CY2016	ally	Other Comprehensive Income Unrealized Gain Loss On Net Investment Hedges Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnNetInvestmentHedgesArisingDuringPeriodBeforeTax	1000000	USD
CY2014	ally	Other Comprehensive Income Unrealized Gain Loss On Net Investment Hedges Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnNetInvestmentHedgesArisingDuringPeriodNetOfTax	8000000	USD
CY2015	ally	Other Comprehensive Income Unrealized Gain Loss On Net Investment Hedges Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnNetInvestmentHedgesArisingDuringPeriodNetOfTax	18000000	USD
CY2016	ally	Other Comprehensive Income Unrealized Gain Loss On Net Investment Hedges Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnNetInvestmentHedgesArisingDuringPeriodNetOfTax	1000000	USD
CY2014	ally	Other Comprehensive Income Unrealized Gain Loss On Net Investment Hedges Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnNetInvestmentHedgesArisingDuringPeriodTax	5000000	USD
CY2015	ally	Other Comprehensive Income Unrealized Gain Loss On Net Investment Hedges Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnNetInvestmentHedgesArisingDuringPeriodTax	11000000	USD
CY2016	ally	Other Comprehensive Income Unrealized Gain Loss On Net Investment Hedges Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnNetInvestmentHedgesArisingDuringPeriodTax	0	USD
CY2014	ally	Other Comprehensive Income Unrealized Gain Losson Net Investment Hedges Arising Duringthe Period Netof Tax OtherComprehensiveIncomeUnrealizedGainLossonNetInvestmentHedgesArisingDuringthePeriodNetofTax	8000000	USD
CY2015	ally	Other Comprehensive Income Unrealized Gain Losson Net Investment Hedges Arising Duringthe Period Netof Tax OtherComprehensiveIncomeUnrealizedGainLossonNetInvestmentHedgesArisingDuringthePeriodNetofTax	18000000	USD
CY2016	ally	Other Comprehensive Income Unrealized Gain Losson Net Investment Hedges Arising Duringthe Period Netof Tax OtherComprehensiveIncomeUnrealizedGainLossonNetInvestmentHedgesArisingDuringthePeriodNetofTax	1000000	USD
CY2016Q4	ally	Other Non Attribute Valuation Allowance OtherNonAttributeValuationAllowance	33000000	USD
CY2015Q4	ally	Payables To Bank Subsidiaries PayablesToBankSubsidiaries	0	USD
CY2015Q4	ally	Payables To Nonbank Subsidiaries PayablesToNonbankSubsidiaries	0	USD
CY2016Q4	ally	Payables To Nonbank Subsidiaries PayablesToNonbankSubsidiaries	0	USD
CY2016Q4	ally	Percentofprincipledebtplusaccruedandunpaidinterestistheredemptionpriceif Allyredeemsthe Series2 Trup Sonorafter February152016. PercentofprincipledebtplusaccruedandunpaidinterestistheredemptionpriceifAllyredeemstheSeries2TRUPSonorafterFebruary152016.	1.00
CY2015Q4	ally	Pledged Assets Investment In Operating Leases PledgedAssetsInvestmentInOperatingLeases	5539000000	USD
CY2016Q4	ally	Pledged Assets Investment In Operating Leases PledgedAssetsInvestmentInOperatingLeases	2040000000	USD
CY2015Q4	ally	Pledged Assets Mortgage Assets Held For Investment PledgedAssetsMortgageAssetsHeldForInvestment	9743000000	USD
CY2016Q4	ally	Pledged Assets Mortgage Assets Held For Investment PledgedAssetsMortgageAssetsHeldForInvestment	10954000000	USD
CY2015	ally	Preferredstockredemption Preferredstockredemption	234000000	USD
CY2015Q4	ally	Premiums Receivable And Other Insurance Assets PremiumsReceivableAndOtherInsuranceAssets	1801000000	USD
CY2016Q4	ally	Premiums Receivable And Other Insurance Assets PremiumsReceivableAndOtherInsuranceAssets	1905000000	USD
CY2014	ally	Proceeds From Sales And Repayments Of Mortgage Loans Held For Investment Originally Designated As Held For Sale ProceedsFromSalesAndRepaymentsOfMortgageLoansHeldForInvestmentOriginallyDesignatedAsHeldForSale	38000000	USD
CY2015	ally	Proceeds From Sales And Repayments Of Mortgage Loans Held For Investment Originally Designated As Held For Sale ProceedsFromSalesAndRepaymentsOfMortgageLoansHeldForInvestmentOriginallyDesignatedAsHeldForSale	68000000	USD
CY2016	ally	Proceeds From Sales And Repayments Of Mortgage Loans Held For Investment Originally Designated As Held For Sale ProceedsFromSalesAndRepaymentsOfMortgageLoansHeldForInvestmentOriginallyDesignatedAsHeldForSale	40000000	USD
CY2014	ally	Provision For Loan Losses Expensed Including Discontinued Operations ProvisionForLoanLossesExpensedIncludingDiscontinuedOperations	457000000	USD
CY2015	ally	Provision For Loan Losses Expensed Including Discontinued Operations ProvisionForLoanLossesExpensedIncludingDiscontinuedOperations	707000000	USD
CY2016	ally	Provision For Loan Losses Expensed Including Discontinued Operations ProvisionForLoanLossesExpensedIncludingDiscontinuedOperations	917000000	USD
CY2014	ally	Purchases Of Operating Lease Assets PurchasesOfOperatingLeaseAssets	9884000000	USD
CY2015	ally	Purchases Of Operating Lease Assets PurchasesOfOperatingLeaseAssets	4685000000	USD
CY2016	ally	Purchases Of Operating Lease Assets PurchasesOfOperatingLeaseAssets	3274000000	USD
CY2016Q4	ally	Reductionintotalsharesoutstanding Reductionintotalsharesoutstanding	0.035
CY2014	ally	Remarketing Fees RemarketingFees	112000000	USD
CY2015	ally	Remarketing Fees RemarketingFees	101000000	USD
CY2016	ally	Remarketing Fees RemarketingFees	103000000	USD
CY2015Q4	ally	Restricted Cash Collections For Securitization Trust RestrictedCashCollectionsForSecuritizationTrust	2010000000	USD
CY2016Q4	ally	Restricted Cash Collections For Securitization Trust RestrictedCashCollectionsForSecuritizationTrust	1694000000	USD
CY2014	ally	Returns Of Contributed Capital ReturnsOfContributedCapital	0	USD
CY2015	ally	Returns Of Contributed Capital ReturnsOfContributedCapital	0	USD
CY2016	ally	Returns Of Contributed Capital ReturnsOfContributedCapital	0	USD
CY2015Q4	ally	Securities Collateral Placedwith Counterparties SecuritiesCollateralPlacedwithCounterparties	86000000	USD
CY2016Q4	ally	Securities Collateral Placedwith Counterparties SecuritiesCollateralPlacedwithCounterparties	72000000	USD
CY2016Q4	ally	Shortduration Insurance Contracts Liabilityfor Unpaid Claimsand Allocated Claim Adjustment Expense Separately Presented ShortdurationInsuranceContractsLiabilityforUnpaidClaimsandAllocatedClaimAdjustmentExpenseSeparatelyPresented	1749000000	USD
CY2015Q4	ally	Standbylettersofcreditandotherguarantees Standbylettersofcreditandotherguarantees	13000000	USD
CY2016Q4	ally	Standbylettersofcreditandotherguarantees Standbylettersofcreditandotherguarantees	8000000	USD
CY2016Q4	ally	Stateand Local Tax Carryforwards Valuation Allowance StateandLocalTaxCarryforwardsValuationAllowance	128000000	USD
CY2015	ally	Stock Repurchaseand Redemption Premium StockRepurchaseandRedemptionPremium	2364000000	USD
CY2015Q4	ally	Time Deposits250000or More Domestic TimeDeposits250000orMoreDomestic	3200000000	USD
CY2016Q4	ally	Time Deposits250000or More Domestic TimeDeposits250000orMoreDomestic	3500000000	USD
CY2014	ally	Total Charge Recorded Related To Rescap Bankruptcy TotalChargeRecordedRelatedToRescapBankruptcy	-150000000	USD
CY2015	ally	Total Charge Recorded Related To Rescap Bankruptcy TotalChargeRecordedRelatedToRescapBankruptcy	0	USD
CY2016	ally	Total Charge Recorded Related To Rescap Bankruptcy TotalChargeRecordedRelatedToRescapBankruptcy	0	USD
CY2015Q4	ally	Total Finance Receivables And Loans From Bank Subsidiary TotalFinanceReceivablesAndLoansFromBankSubsidiary	0	USD
CY2016Q4	ally	Total Finance Receivables And Loans From Bank Subsidiary TotalFinanceReceivablesAndLoansFromBankSubsidiary	0	USD
CY2015Q4	ally	Total Finance Receivables And Loans From Nonbank Subsidiary TotalFinanceReceivablesAndLoansFromNonbankSubsidiary	0	USD
CY2016Q4	ally	Total Finance Receivables And Loans From Nonbank Subsidiary TotalFinanceReceivablesAndLoansFromNonbankSubsidiary	0	USD
CY2014	ally	Total Financing Revenue And Other Interest Income TotalFinancingRevenueAndOtherInterestIncome	8391000000	USD
CY2015	ally	Total Financing Revenue And Other Interest Income TotalFinancingRevenueAndOtherInterestIncome	8397000000	USD
CY2016	ally	Total Financing Revenue And Other Interest Income TotalFinancingRevenueAndOtherInterestIncome	8305000000	USD
CY2014	ally	Undistributed Income Of Bank Subsidiaries UndistributedIncomeOfBankSubsidiaries	0	USD
CY2015	ally	Undistributed Income Of Bank Subsidiaries UndistributedIncomeOfBankSubsidiaries	0	USD
CY2016	ally	Undistributed Income Of Bank Subsidiaries UndistributedIncomeOfBankSubsidiaries	0	USD
CY2014	ally	Undistributed Income Of Nonbank Subsidiaries UndistributedIncomeOfNonbankSubsidiaries	0	USD
CY2015	ally	Undistributed Income Of Nonbank Subsidiaries UndistributedIncomeOfNonbankSubsidiaries	0	USD
CY2016	ally	Undistributed Income Of Nonbank Subsidiaries UndistributedIncomeOfNonbankSubsidiaries	0	USD
CY2015Q4	ally	Unusedrevolvingcreditlinecommitmentsandother Unusedrevolvingcreditlinecommitmentsandother	1445000000	USD
CY2016Q4	ally	Unusedrevolvingcreditlinecommitmentsandother Unusedrevolvingcreditlinecommitmentsandother	1995000000	USD
CY2014	ally	Vehicle Remarketing And Repossession VehicleRemarketingAndRepossession	83000000	USD
CY2015	ally	Vehicle Remarketing And Repossession VehicleRemarketingAndRepossession	78000000	USD
CY2016	ally	Vehicle Remarketing And Repossession VehicleRemarketingAndRepossession	95000000	USD
CY2015Q4	ally	Warehouseandconstructionlendingcommitments Warehouseandconstructionlendingcommitments	197000000	USD
CY2016Q4	ally	Warehouseandconstructionlendingcommitments Warehouseandconstructionlendingcommitments	164000000	USD
CY2016	dei	Amendment Flag AmendmentFlag	false
CY2016	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2016	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2016	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2016
CY2016	dei	Document Period End Date DocumentPeriodEndDate	2016-12-31
CY2016	dei	Document Type DocumentType	10-K
CY2016	dei	Entity Central Index Key EntityCentralIndexKey	0000040729
CY2017Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	465035069	shares
CY2016	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2016	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2016Q2	dei	Entity Public Float EntityPublicFloat	8257669855	USD
CY2016	dei	Entity Registrant Name EntityRegistrantName	Ally Financial Inc.
CY2016	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2016	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2015Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	59116000000	USD
CY2016Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	34166000000	USD
CY2015Q4	us-gaap	Accounts And Other Receivables Net Current AccountsAndOtherReceivablesNetCurrent	158000000	USD
CY2016Q4	us-gaap	Accounts And Other Receivables Net Current AccountsAndOtherReceivablesNetCurrent	100000000	USD
CY2015Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	1545000000	USD
CY2016Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	1737000000	USD
CY2015Q4	us-gaap	Accounts Payable Current And Noncurrent AccountsPayableCurrentAndNoncurrent	391000000	USD
CY2016Q4	us-gaap	Accounts Payable Current And Noncurrent AccountsPayableCurrentAndNoncurrent	649000000	USD
CY2015Q4	us-gaap	Accrued Employee Benefits Current And Noncurrent AccruedEmployeeBenefitsCurrentAndNoncurrent	242000000	USD
CY2016Q4	us-gaap	Accrued Employee Benefits Current And Noncurrent AccruedEmployeeBenefitsCurrentAndNoncurrent	232000000	USD
CY2015Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	456000000	USD
CY2016Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	525000000	USD
CY2013Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-269000000	USD
CY2014Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-21000000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-159000000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-273000000	USD
CY2013Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	5000000	USD
CY2014Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	7000000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	8000000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	8000000	USD
CY2013Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	77000000	USD
CY2014Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	88000000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	89000000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	90000000	USD
CY2013Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	65000000	USD
CY2014Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	36000000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	9000000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	14000000	USD
CY2013Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-276000000	USD
CY2014Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-66000000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-231000000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-341000000	USD
CY2014	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	99000000	USD
CY2015	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	62000000	USD
CY2016	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	66000000	USD
CY2015	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	283000000	USD
CY2016	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	341000000	USD
CY2015	us-gaap	Allowance For Loan And Lease Losses Adjustments Net AllowanceForLoanAndLeaseLossesAdjustmentsNet	-21000000	USD
CY2016	us-gaap	Allowance For Loan And Lease Losses Adjustments Net AllowanceForLoanAndLeaseLossesAdjustmentsNet	-26000000	USD
CY2015	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	892000000	USD
CY2016	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	1142000000	USD
CY2015	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	609000000	USD
CY2016	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	801000000	USD
CY2016	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	6000000	USD
CY2014Q4	us-gaap	Assets Assets	151631000000	USD
CY2015Q4	us-gaap	Assets Assets	158581000000	USD
CY2016Q4	us-gaap	Assets Assets	163728000000	USD
CY2014	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	54000000	USD
CY2015	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	16000000	USD
CY2016	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	5000000	USD
CY2014	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	43000000	USD
CY2015	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	2000000	USD
CY2016	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	3000000	USD
CY2015Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	17157000000	USD
CY2016Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	18926000000	USD
CY2015Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	17350000000	USD
CY2016Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	19293000000	USD
CY2015	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses	150000000	USD
CY2016	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses	118000000	USD
CY2015	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses	139000000	USD
CY2016	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses	317000000	USD
CY2015Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	8511000000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	12356000000	USD
CY2015Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	2798000000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	2038000000	USD
CY2014	us-gaap	Available For Sale Securities Gross Realized Gain Loss Net AvailableForSaleSecuritiesGrossRealizedGainLossNet	181000000	USD
CY2015	us-gaap	Available For Sale Securities Gross Realized Gain Loss Net AvailableForSaleSecuritiesGrossRealizedGainLossNet	155000000	USD
CY2016	us-gaap	Available For Sale Securities Gross Realized Gain Loss Net AvailableForSaleSecuritiesGrossRealizedGainLossNet	185000000	USD
CY2014	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	209000000	USD
CY2015	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	184000000	USD
CY2016	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	187000000	USD
CY2014	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	14000000	USD
CY2015	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	15000000	USD
CY2016	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	2000000	USD
CY2015	us-gaap	Available For Sale Securities Gross Unrealized Gains AvailableForSaleSecuritiesGrossUnrealizedGains	96000000	USD
CY2016	us-gaap	Available For Sale Securities Gross Unrealized Gains AvailableForSaleSecuritiesGrossUnrealizedGains	68000000	USD
CY2015	us-gaap	Available For Sale Securities Gross Unrealized Loss AvailableForSaleSecuritiesGrossUnrealizedLoss	289000000	USD
CY2016	us-gaap	Available For Sale Securities Gross Unrealized Loss AvailableForSaleSecuritiesGrossUnrealizedLoss	435000000	USD
CY2014	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	181000000	USD
CY2015	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	155000000	USD
CY2016	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	185000000	USD
CY2016Q2	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount	0	USD
CY2016Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0800
CY2013Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	5531000000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	5576000000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	6380000000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	5934000000	USD
CY2014	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	45000000	USD
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	804000000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-446000000	USD
CY2015Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	2148000000	USD
CY2016Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	1547000000	USD
CY2015Q4	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	1000000000	USD
CY2016Q4	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	300000000	USD
CY2014	us-gaap	Ceded Premiums Earned CededPremiumsEarned	117000000	USD
CY2015	us-gaap	Ceded Premiums Earned CededPremiumsEarned	125000000	USD
CY2016	us-gaap	Ceded Premiums Earned CededPremiumsEarned	141000000	USD
CY2014	us-gaap	Ceded Premiums Written CededPremiumsWritten	156000000	USD
CY2015	us-gaap	Ceded Premiums Written CededPremiumsWritten	184000000	USD
CY2016	us-gaap	Ceded Premiums Written CededPremiumsWritten	198000000	USD
CY2014	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.00
CY2015	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.00
CY2016Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.00
CY2016Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.00
CY2016Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.08
CY2016Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.08
CY2016	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.16
CY2015Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2016Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0
CY2016Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2014Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1100000000.00	shares
CY2015Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1100000000	shares
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1100000000	shares
CY2013Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	479767000	shares
CY2014Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	480136000	shares
CY2015Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	482790696	shares
CY2015Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	482791000	shares
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	485707644	shares
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	485708000	shares
CY2014Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	480095000	shares
CY2015Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	481980000	shares
CY2015Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	481980111	shares
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	467000000	shares
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	467000306	shares
CY2015Q4	us-gaap	Common Stocks Including Additional Paid In Capital Net Of Discount CommonStocksIncludingAdditionalPaidInCapitalNetOfDiscount	21100000000	USD
CY2016Q4	us-gaap	Common Stocks Including Additional Paid In Capital Net Of Discount CommonStocksIncludingAdditionalPaidInCapitalNetOfDiscount	21166000000	USD
CY2014	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	334000000	USD
CY2015	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	267000000	USD
CY2016	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	274000000	USD
CY2014	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1360000000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1124000000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	957000000	USD
CY2014	us-gaap	Contractually Specified Servicing Fees Late Fees And Ancillary Fees Earned In Exchange For Servicing Financial Assets ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets	31000000	USD
CY2015	us-gaap	Contractually Specified Servicing Fees Late Fees And Ancillary Fees Earned In Exchange For Servicing Financial Assets ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets	45000000	USD
CY2016	us-gaap	Contractually Specified Servicing Fees Late Fees And Ancillary Fees Earned In Exchange For Servicing Financial Assets ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets	64000000	USD
CY2015Q4	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	16000000	USD
CY2016Q4	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	14000000	USD
CY2014	us-gaap	Cumulative Translation Adjustment Net Of Tax Period Increase Decrease CumulativeTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease	41000000	USD
CY2015	us-gaap	Cumulative Translation Adjustment Net Of Tax Period Increase Decrease CumulativeTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease	59000000	USD
CY2016	us-gaap	Cumulative Translation Adjustment Net Of Tax Period Increase Decrease CumulativeTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease	4000000	USD
CY2014	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-3000000	USD
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2014	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	8000000	USD
CY2015	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	6000000	USD
CY2016	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	8000000	USD
CY2014	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	10000000	USD
CY2015	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	9000000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	17000000	USD
CY2014	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	5000000	USD
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3000000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	9000000	USD
CY2015Q4	us-gaap	Customer Securities For Which Entity Has Right To Sell Or Repledge Fair Value CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeFairValue	7000000	USD
CY2016Q4	us-gaap	Customer Securities For Which Entity Has Right To Sell Or Repledge Fair Value CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeFairValue	6000000	USD
CY2016Q4	us-gaap	Debt Instrument Interest Rate Stated Percentage DebtInstrumentInterestRateStatedPercentage	0.0813
CY2014	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	270000000	USD
CY2015	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	454000000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	423000000	USD
CY2014	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	2000000	USD
CY2015	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	1000000	USD
CY2016	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0	USD
CY2014	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	311000000	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	487000000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	453000000	USD
CY2015Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1907000000	USD
CY2016Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	2481000000	USD
CY2015Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	1199000000	USD
CY2016Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	1258000000	USD
CY2015Q4	us-gaap	Deferred Revenue DeferredRevenue	108000000	USD
CY2016Q4	us-gaap	Deferred Revenue DeferredRevenue	56000000	USD
CY2014	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	39000000	USD
CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	32000000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	30000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	3848000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	4103000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Hedging Transactions DeferredTaxAssetsHedgingTransactions	99000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Hedging Transactions DeferredTaxAssetsHedgingTransactions	123000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	976000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	3266000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	3457000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	212000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	208000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	1369000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	994000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	1941000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	1987000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	311000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	546000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Premiums Reserve DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve	141000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Premiums Reserve DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve	141000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	582000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	646000000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	2481000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Financing Arrangements DeferredTaxLiabilitiesFinancingArrangements	162000000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Financing Arrangements DeferredTaxLiabilitiesFinancingArrangements	161000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	1273000000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	1789000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	69000000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	107000000	USD
CY2015Q4	us-gaap	Delinquent Amount At End Of Period On Loans Managed And Securitized DelinquentAmountAtEndOfPeriodOnLoansManagedAndSecuritized	721000000	USD
CY2016Q4	us-gaap	Delinquent Amount At End Of Period On Loans Managed And Securitized DelinquentAmountAtEndOfPeriodOnLoansManagedAndSecuritized	841000000	USD
CY2015Q4	us-gaap	Deposit Assets DepositAssets	14000000	USD
CY2016Q4	us-gaap	Deposit Assets DepositAssets	14000000	USD
CY2015Q4	us-gaap	Deposits Deposits	66478000000	USD
CY2016Q4	us-gaap	Deposits Deposits	79022000000	USD
CY2015Q4	us-gaap	Deposits Retail DepositsRetail	229000000	USD
CY2016Q4	us-gaap	Deposits Retail DepositsRetail	167000000	USD
CY2015Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	36386000000	USD
CY2016Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	46976000000	USD
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CY2015	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	2801000000	USD
CY2016	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	2382000000	USD
CY2014	us-gaap	Depreciation Nonproduction DepreciationNonproduction	81000000	USD
CY2015	us-gaap	Depreciation Nonproduction DepreciationNonproduction	82000000	USD
CY2016	us-gaap	Depreciation Nonproduction DepreciationNonproduction	84000000	USD
CY2015Q4	us-gaap	Derivative Amount Of Hedged Item DerivativeAmountOfHedgedItem	331000000	USD
CY2016Q4	us-gaap	Derivative Amount Of Hedged Item DerivativeAmountOfHedgedItem	315000000	USD
CY2015Q4	us-gaap	Derivative Asset Not Subject To Master Netting Arrangement DerivativeAssetNotSubjectToMasterNettingArrangement	78000000	USD
CY2016Q4	us-gaap	Derivative Asset Not Subject To Master Netting Arrangement DerivativeAssetNotSubjectToMasterNettingArrangement	12000000	USD
CY2015Q4	us-gaap	Derivative Assets DerivativeAssets	88000000	USD
CY2016Q4	us-gaap	Derivative Assets DerivativeAssets	74000000	USD
CY2015Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	67000000	USD
CY2016Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	9000000	USD
CY2015Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	2000000	USD
CY2016Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	13000000	USD
CY2015Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	233000000	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	95000000	USD
CY2015Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	233000000	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	95000000	USD
CY2015Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	145000000	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	95000000	USD
CY2015Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	145000000	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	95000000	USD
CY2015Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	65000000	USD
CY2016Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	70000000	USD
CY2015Q4	us-gaap	Derivative Liability Not Subject To Master Netting Arrangement Deduction DerivativeLiabilityNotSubjectToMasterNettingArrangementDeduction	78000000	USD
CY2016Q4	us-gaap	Derivative Liability Not Subject To Master Netting Arrangement Deduction DerivativeLiabilityNotSubjectToMasterNettingArrangementDeduction	12000000	USD
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CY2015	us-gaap	Direct Premiums Earned DirectPremiumsEarned	296000000	USD
CY2016	us-gaap	Direct Premiums Earned DirectPremiumsEarned	318000000	USD
CY2014	us-gaap	Direct Premiums Written DirectPremiumsWritten	294000000	USD
CY2015	us-gaap	Direct Premiums Written DirectPremiumsWritten	313000000	USD
CY2016	us-gaap	Direct Premiums Written DirectPremiumsWritten	317000000	USD
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CY2016	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	0	USD
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CY2016	us-gaap	Dividend Income Operating DividendIncomeOperating	17000000	USD
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CY2016Q4	us-gaap	Dividends Payable Amount Per Share DividendsPayableAmountPerShare	0.08
CY2014	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	268000000	USD
CY2015	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	2571000000	USD
CY2016	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	30000000	USD
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CY2016	us-gaap	Fair Value Assets Measured On Recurring Basis Change In Unrealized Gain Loss FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	0	USD
CY2015	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	10000000	USD
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CY2016	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues	0	USD
CY2015	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	0	USD
CY2016	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	0	USD
CY2015	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales	4000000	USD
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CY2014Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	50000000	USD
CY2015Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	40000000	USD
CY2016Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	29000000	USD
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CY2015Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	4000000000	USD
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CY2015Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	391000000	USD
CY2016Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	577000000	USD
CY2015Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	0	USD
CY2016Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	435000000	USD
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CY2016	us-gaap	Fees And Commissions Other FeesAndCommissionsOther	98000000	USD
CY2015Q4	us-gaap	Financial Instruments Owned And Pledged As Collateral Amount Eligible To Be Repledged By Counterparty FinancialInstrumentsOwnedAndPledgedAsCollateralAmountEligibleToBeRepledgedByCounterparty	745000000	USD
CY2016Q4	us-gaap	Financial Instruments Owned And Pledged As Collateral Amount Eligible To Be Repledged By Counterparty FinancialInstrumentsOwnedAndPledgedAsCollateralAmountEligibleToBeRepledgedByCounterparty	737000000	USD
CY2015Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	968000000	USD
CY2016Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	1059000000	USD
CY2015Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	86000000	USD
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CY2015Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	110942000000	USD
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CY2015Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	658000000	USD
CY2016Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	739000000	USD
CY2015	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	17428000000
CY2016	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	20355
CY2015	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	305000000	USD
CY2016	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	321000000	USD
CY2015	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	348000000	USD
CY2016	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	375000000	USD
CY2015Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	625000000	USD
CY2016Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	663000000	USD
CY2015Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	109186000000	USD
CY2016Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	116185000000	USD
CY2015Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	680000000	USD
CY2016Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	819000000	USD
CY2015Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	2414000000	USD
CY2016Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	2759000000	USD
CY2015	us-gaap	Financing Receivable Significant Purchases FinancingReceivableSignificantPurchases	4397000000	USD
CY2016	us-gaap	Financing Receivable Significant Purchases FinancingReceivableSignificantPurchases	3768000000	USD
CY2014	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	63000000	USD
CY2015	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	35000000	USD
CY2016	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-7000000	USD
CY2014	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	7000000	USD
CY2015	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	45000000	USD
CY2016	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	11000000	USD
CY2014	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-202000000	USD
CY2015	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-357000000	USD
CY2016	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-5000000	USD
CY2015Q4	us-gaap	Goodwill Goodwill	27000000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	240000000	USD
CY2015Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	0	USD
CY2016Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	839000000	USD
CY2015Q4	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	0	USD
CY2016Q4	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	839000000	USD
CY2016Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	0	USD
CY2016Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	0	USD
CY2016Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	839000000	USD
CY2016Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	0	USD
CY2015Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	0	USD
CY2016Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	789000000	USD
CY2014	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	1316000000	USD
CY2015	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	654000000	USD
CY2016	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	701000000	USD
CY2014	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	37000000	USD
CY2015	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	29000000	USD
CY2016	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	28000000	USD
CY2015Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	658000000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	739000000	USD
CY2015Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	86000000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	85000000	USD
CY2015Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	661000000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	795000000	USD
CY2015Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	69000000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	199000000	USD
CY2015Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	589000000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	540000000	USD
CY2014	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	925000000	USD
CY2015Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	179000000	USD
CY2015Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	169000000	USD
CY2015Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	273000000	USD
CY2015Q4	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	276000000	USD
CY2015	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	897000000	USD
CY2016Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	247000000	USD
CY2016Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	357000000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	261000000	USD
CY2016Q4	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	246000000	USD
CY2016	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	1111000000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1246000000	USD
CY2015Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	282000000	USD
CY2015Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	263000000	USD
CY2015Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	417000000	USD
CY2015Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	431000000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1393000000	USD
CY2016Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	397000000	USD
CY2016Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	413000000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	391000000	USD
CY2016Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	380000000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1581000000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.36
CY2015Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.23
CY2015Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-2.24
CY2015Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.49
CY2015Q4	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-1.94
CY2015	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-3.47
CY2016Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.48
CY2016Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.70
CY2016Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.54
CY2016Q4	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.52
CY2016	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.25
CY2014	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.36
CY2015Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.23
CY2015Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-2.24
CY2015Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.49
CY2015Q4	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-1.94
CY2015	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-3.47
CY2016Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.48
CY2016Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.70
CY2016Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.54
CY2016Q4	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.52
CY2016	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.24
CY2014	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	225000000	USD
CY2015Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	397000000	USD
CY2015Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	13000000	USD
CY2015Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-5000000	USD
CY2015Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-13000000	USD
CY2015	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	392000000	USD
CY2016Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	3000000	USD
CY2016Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	3000000	USD
CY2016Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-52000000	USD
CY2016Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	2000000	USD
CY2016	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-44000000	USD
CY2014	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.47
CY2015Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	1.06
CY2015Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-2.22
CY2015Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.48
CY2015Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-1.97
CY2015	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.81
CY2016Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.49
CY2016Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.71
CY2016Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.43
CY2016Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.53
CY2016	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.09
CY2014	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.47
CY2015Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	1.06
CY2015Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-2.22
CY2015Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.47
CY2015Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-1.97
CY2015	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.81
CY2016Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.49
CY2016Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.71
CY2016Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.43
CY2016Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.52
CY2016	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.09
CY2014	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	18000000	USD
CY2015	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	52000000	USD
CY2016	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	18000000	USD
CY2014	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	321000000	USD
CY2015Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	103000000	USD
CY2015Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	94000000	USD
CY2015Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	144000000	USD
CY2015Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	155000000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	496000000	USD
CY2016Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	150000000	USD
CY2016Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	56000000	USD
CY2016Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	130000000	USD
CY2016Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	134000000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	470000000	USD
CY2014	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-47000000	USD
CY2015	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-25000000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	51000000	USD
CY2014	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-39000000	USD
CY2015	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2014	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	31000000	USD
CY2015	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	14000000	USD
CY2016	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	7000000	USD
CY2014	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	436000000	USD
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	488000000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	553000000	USD
CY2014	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-18000000	USD
CY2015	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1000000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	0	USD
CY2014	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	48000000	USD
CY2015	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	38000000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	35000000	USD
CY2014	us-gaap	Income Taxes Paid IncomeTaxesPaid	8000000	USD
CY2015	us-gaap	Income Taxes Paid IncomeTaxesPaid	96000000	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	19000000	USD
CY2014	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-117000000	USD
CY2015	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-565000000	USD
CY2016	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-458000000	USD
CY2014	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	4851000000	USD
CY2015	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	8247000000	USD
CY2016	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	12508000000	USD
CY2014	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-411000000	USD
CY2015	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-127000000	USD
CY2016	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	1000000	USD
CY2014	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	132000000	USD
CY2015	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-526000000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	120000000	USD
CY2014	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	247000000	USD
CY2015	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-4000000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-160000000	USD
CY2014	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-400000000	USD
CY2015	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-247000000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-206000000	USD
CY2014	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-1625000000	USD
CY2015	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-264000000	USD
CY2016	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-392000000	USD
CY2014	us-gaap	Insurance Commissions InsuranceCommissions	374000000	USD
CY2015	us-gaap	Insurance Commissions InsuranceCommissions	378000000	USD
CY2016	us-gaap	Insurance Commissions InsuranceCommissions	389000000	USD
CY2014	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	760000000	USD
CY2015	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	753000000	USD
CY2016	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	763000000	USD
CY2014	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	979000000	USD
CY2015	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	940000000	USD
CY2016	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	945000000	USD
CY2014	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	367000000	USD
CY2015	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	381000000	USD
CY2016	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	418000000	USD
CY2014	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	4457000000	USD
CY2015	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	4570000000	USD
CY2016	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	5162000000	USD
CY2014	us-gaap	Interest And Fee Income Loans And Leases Held For Sale InterestAndFeeIncomeLoansAndLeasesHeldForSale	1000000	USD
CY2015	us-gaap	Interest And Fee Income Loans And Leases Held For Sale InterestAndFeeIncomeLoansAndLeasesHeldForSale	40000000	USD
CY2016	us-gaap	Interest And Fee Income Loans And Leases Held For Sale InterestAndFeeIncomeLoansAndLeasesHeldForSale	0	USD
CY2015Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	66389000000	USD
CY2016Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	78938000000	USD
CY2015Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	4232000000	USD
CY2016Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	4387000000	USD
CY2014	us-gaap	Interest Expense InterestExpense	2783000000	USD
CY2015	us-gaap	Interest Expense InterestExpense	2429000000	USD
CY2016	us-gaap	Interest Expense InterestExpense	2629000000	USD
CY2014	us-gaap	Interest Expense Deposits InterestExpenseDeposits	664000000	USD
CY2015	us-gaap	Interest Expense Deposits InterestExpenseDeposits	718000000	USD
CY2016	us-gaap	Interest Expense Deposits InterestExpenseDeposits	830000000	USD
CY2014	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	2067000000	USD
CY2015	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	1662000000	USD
CY2016	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	1742000000	USD
CY2014	us-gaap	Interest Expense Related Party InterestExpenseRelatedParty	0	USD
CY2015	us-gaap	Interest Expense Related Party InterestExpenseRelatedParty	0	USD
CY2016	us-gaap	Interest Expense Related Party InterestExpenseRelatedParty	0	USD
CY2014	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	52000000	USD
CY2015	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	49000000	USD
CY2016	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	57000000	USD
CY2014	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	8000000	USD
CY2015	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	8000000	USD
CY2016	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	14000000	USD
CY2014	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	2918000000	USD
CY2015	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	3012000000	USD
CY2014	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	336000000	USD
CY2015	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	340000000	USD
CY2016	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	375000000	USD
CY2014	us-gaap	Interest Paid InterestPaid	3090000000	USD
CY2015	us-gaap	Interest Paid InterestPaid	2632000000	USD
CY2016	us-gaap	Interest Paid InterestPaid	2647000000	USD
CY2015Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	350000000	USD
CY2016Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	351000000	USD
CY2015Q4	us-gaap	Interest Receivable InterestReceivable	402000000	USD
CY2016Q4	us-gaap	Interest Receivable InterestReceivable	476000000	USD
CY2014	us-gaap	Labor And Related Expense LaborAndRelatedExpense	947000000	USD
CY2015	us-gaap	Labor And Related Expense LaborAndRelatedExpense	963000000	USD
CY2016	us-gaap	Labor And Related Expense LaborAndRelatedExpense	992000000	USD
CY2014	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	50000000	USD
CY2015	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	51000000	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	51000000	USD
CY2015Q4	us-gaap	Liabilities Liabilities	145142000000	USD
CY2016Q4	us-gaap	Liabilities Liabilities	150411000000	USD
CY2015Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	158581000000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	163728000000	USD
CY2015Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	169000000	USD
CY2016Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	149000000	USD
CY2016	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	320000000	USD
CY2016	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	30000000	USD
CY2016	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	342000000	USD
CY2015Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	49000000	USD
CY2016Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	41000000	USD
CY2016	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	52000000	USD
CY2014Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	977000000	USD
CY2015Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	1054000000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	1144000000	USD
CY2015Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	111600000000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	118944000000	USD
CY2015Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	110546000000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	117800000000	USD
CY2015Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	105000000	USD
CY2016Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	0	USD
CY2015Q4	us-gaap	Long Term Debt LongTermDebt	66234000000	USD
CY2016Q4	us-gaap	Long Term Debt LongTermDebt	54128000000	USD
CY2015Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	11256000000	USD
CY2016Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	14553000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	9032000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	14553000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	3076000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	6421000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	8976000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	11755000000	USD
CY2015Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	54647000000	USD
CY2016Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	39260000000	USD
CY2014	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	111000000	USD
CY2015	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	107000000	USD
CY2016	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	112000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-145000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	5444000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	3670000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-3212000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-9747000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-8684000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3403000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	5111000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4567000000	USD
CY2015	us-gaap	Net Credit Loss On Loans Managed Or Securitized Or Assetbacked Financing Arrangement NetCreditLossOnLoansManagedOrSecuritizedOrAssetbackedFinancingArrangement	614000000	USD
CY2016	us-gaap	Net Credit Loss On Loans Managed Or Securitized Or Assetbacked Financing Arrangement NetCreditLossOnLoansManagedOrSecuritizedOrAssetbackedFinancingArrangement	812000000	USD
CY2014	us-gaap	Net Income Loss NetIncomeLoss	1150000000	USD
CY2015Q1	us-gaap	Net Income Loss NetIncomeLoss	576000000	USD
CY2015Q2	us-gaap	Net Income Loss NetIncomeLoss	182000000	USD
CY2015Q3	us-gaap	Net Income Loss NetIncomeLoss	268000000	USD
CY2015Q4	us-gaap	Net Income Loss NetIncomeLoss	263000000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	1289000000	USD
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	250000000	USD
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	360000000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	209000000	USD
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	248000000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	1067000000	USD
CY2014	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	882000000	USD
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-1282000000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1037000000	USD
CY2014Q4	us-gaap	Noncurrent Assets NoncurrentAssets	19735000000	USD
CY2015Q4	us-gaap	Noncurrent Assets NoncurrentAssets	16506000000	USD
CY2016Q4	us-gaap	Noncurrent Assets NoncurrentAssets	11846000000	USD
CY2015Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	89000000	USD
CY2016Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	84000000	USD
CY2014	us-gaap	Noninterest Expense NoninterestExpense	2948000000	USD
CY2015Q1	us-gaap	Noninterest Expense NoninterestExpense	695000000	USD
CY2015Q2	us-gaap	Noninterest Expense NoninterestExpense	724000000	USD
CY2015Q3	us-gaap	Noninterest Expense NoninterestExpense	674000000	USD
CY2015Q4	us-gaap	Noninterest Expense NoninterestExpense	668000000	USD
CY2015	us-gaap	Noninterest Expense NoninterestExpense	2761000000	USD
CY2016Q1	us-gaap	Noninterest Expense NoninterestExpense	710000000	USD
CY2016Q2	us-gaap	Noninterest Expense NoninterestExpense	773000000	USD
CY2016Q3	us-gaap	Noninterest Expense NoninterestExpense	735000000	USD
CY2016Q4	us-gaap	Noninterest Expense NoninterestExpense	721000000	USD
CY2016	us-gaap	Noninterest Expense NoninterestExpense	2939000000	USD
CY2014	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	311000000	USD
CY2015	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	359000000	USD
CY2016	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	394000000	USD
CY2014	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	1276000000	USD
CY2015Q1	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	243000000	USD
CY2015Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	211000000	USD
CY2015Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	332000000	USD
CY2015Q4	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	356000000	USD
CY2015	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	1142000000	USD
CY2016Q1	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	376000000	USD
CY2016Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	374000000	USD
CY2016Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	388000000	USD
CY2016Q4	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	392000000	USD
CY2016	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	1530000000	USD
CY2014	us-gaap	Occupancy Net OccupancyNet	47000000	USD
CY2015	us-gaap	Occupancy Net OccupancyNet	50000000	USD
CY2016	us-gaap	Occupancy Net OccupancyNet	51000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	240000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	36000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	25000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	33000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	35000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	36000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	75000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Receivable OperatingLeasesFutureMinimumPaymentsReceivable	2933000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Receivable Current OperatingLeasesFutureMinimumPaymentsReceivableCurrent	1759000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Four Years OperatingLeasesFutureMinimumPaymentsReceivableInFourYears	44000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Three Years OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears	307000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Two Years OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears	821000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Receivable Thereafter OperatingLeasesFutureMinimumPaymentsReceivableThereafter	2000000	USD
CY2014	us-gaap	Operating Leases Income Statement Depreciation Expense On Property Subject To Or Held For Lease OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease	2233000000	USD
CY2015	us-gaap	Operating Leases Income Statement Depreciation Expense On Property Subject To Or Held For Lease OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease	2249000000	USD
CY2016	us-gaap	Operating Leases Income Statement Depreciation Expense On Property Subject To Or Held For Lease OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease	1769000000	USD
CY2014	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	3558000000	USD
CY2015	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	3398000000	USD
CY2016	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	2711000000	USD
CY2015Q4	us-gaap	Other Accrued Liabilities Current And Noncurrent OtherAccruedLiabilitiesCurrentAndNoncurrent	408000000	USD
CY2016Q4	us-gaap	Other Accrued Liabilities Current And Noncurrent OtherAccruedLiabilitiesCurrentAndNoncurrent	546000000	USD
CY2015Q4	us-gaap	Other Assets OtherAssets	6321000000	USD
CY2016Q4	us-gaap	Other Assets OtherAssets	6854000000	USD
CY2015Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	972000000	USD
CY2016Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	1371000000	USD
CY2016Q4	us-gaap	Other Commitment OtherCommitment	111000000	USD
CY2016Q4	us-gaap	Other Commitment Due In Fourth Year OtherCommitmentDueInFourthYear	4000000	USD
CY2016Q4	us-gaap	Other Commitment Due In Next Twelve Months OtherCommitmentDueInNextTwelveMonths	94000000	USD
CY2016Q4	us-gaap	Other Commitment Due In Second And Third Year OtherCommitmentDueInSecondAndThirdYear	13000000	USD
CY2014	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent	376000000	USD
CY2015	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent	-220000000	USD
CY2016	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent	-172000000	USD
CY2014	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	248000000	USD
CY2015	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-138000000	USD
CY2016	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-114000000	USD
CY2014	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	128000000	USD
CY2015	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-82000000	USD
CY2016	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-58000000	USD
CY2014	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent	17000000	USD
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent	1000000	USD
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent	1000000	USD
CY2014	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	11000000	USD
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	1000000	USD
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	1000000	USD
CY2014	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-15000000	USD
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	0	USD
CY2016Q4	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-3000000	USD
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-3000000	USD
CY2014	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-9000000	USD
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	0	USD
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-2000000	USD
CY2014	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	-6000000	USD
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	0	USD
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	0	USD
CY2014	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	2000000	USD
CY2015	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	1000000	USD
CY2016	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	0	USD
CY2014	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent	-50000000	USD
CY2015	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent	-81000000	USD
CY2016Q4	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent	6000000	USD
CY2014	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-37000000	USD
CY2015	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-48000000	USD
CY2016Q4	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	4000000	USD
CY2016	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	4000000	USD
CY2014	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-17000000	USD
CY2015	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-26000000	USD
CY2016	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	3000000	USD
CY2014	us-gaap	Other Comprehensive Income Foreign Currency Translation Adjustment Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTranslationAdjustmentTaxPortionAttributableToParent	-13000000	USD
CY2015	us-gaap	Other Comprehensive Income Foreign Currency Translation Adjustment Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTranslationAdjustmentTaxPortionAttributableToParent	-33000000	USD
CY2016Q4	us-gaap	Other Comprehensive Income Foreign Currency Translation Adjustment Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTranslationAdjustmentTaxPortionAttributableToParent	2000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	324000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-267000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-166000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-27000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-39000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	5000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-29000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-27000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	5000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax	23000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax	42000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax	-1000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax	20000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax	22000000	USD
CY2016Q4	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax	-1000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax	1000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationTax	3000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationTax	20000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationTax	0	USD
CY2014	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-10000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-13000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	2000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	210000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-165000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-110000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	210000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-165000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-110000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-24000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	0	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-5000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	181000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	155000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	185000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	167000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	99000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	147000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	14000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	56000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	38000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	7000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-1000000	USD
CY2016Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	4000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	4000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-1000000	USD
CY2016Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	2000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-3000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	0	USD
CY2016Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-2000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	114000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-102000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-56000000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	2000000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	2000000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	2000000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	1000000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	0	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	0	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	1000000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	557000000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-65000000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	13000000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	415000000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-39000000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	33000000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	142000000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-26000000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-20000000	USD
CY2014	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	212000000	USD
CY2015	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	216000000	USD
CY2016	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	242000000	USD
CY2014	us-gaap	Other Income OtherIncome	62000000	USD
CY2015	us-gaap	Other Income OtherIncome	71000000	USD
CY2016	us-gaap	Other Income OtherIncome	111000000	USD
CY2014	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1591000000	USD
CY2015	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1505000000	USD
CY2016	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1605000000	USD
CY2015Q4	us-gaap	Other Short Term Borrowings OtherShortTermBorrowings	84000000	USD
CY2016Q4	us-gaap	Other Short Term Borrowings OtherShortTermBorrowings	0	USD
CY2014	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities	14000000	USD
CY2015	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities	14000000	USD
CY2016	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities	0	USD
CY2016	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	350000000	USD
CY2014	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	0	USD
CY2015	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	1770000000	USD
CY2016	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	141000000	USD
CY2014	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-6000000	USD
CY2016Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	439000000	USD
CY2015	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	5000000	USD
CY2016	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	312000000	USD
CY2014	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2015	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	16000000	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	341000000	USD
CY2014	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	0	USD
CY2015	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	559000000	USD
CY2016	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	696000000	USD
CY2014	us-gaap	Payments Of Dividends PaymentsOfDividends	268000000	USD
CY2015	us-gaap	Payments Of Dividends PaymentsOfDividends	2571000000	USD
CY2016	us-gaap	Payments Of Dividends PaymentsOfDividends	108000000	USD
CY2014	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	5417000000	USD
CY2015	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	12250000000	USD
CY2016	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	16031000000	USD
CY2014	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	USD
CY2015	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	USD
CY2016	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	841000000	USD
CY2014	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	0	USD
CY2015	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	0	USD
CY2016	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	309000000	USD
CY2014	us-gaap	Payments To Acquire Loans Held For Investment PaymentsToAcquireLoansHeldForInvestment	877000000	USD
CY2015	us-gaap	Payments To Acquire Loans Held For Investment PaymentsToAcquireLoansHeldForInvestment	4501000000	USD
CY2016	us-gaap	Payments To Acquire Loans Held For Investment PaymentsToAcquireLoansHeldForInvestment	3859000000	USD
CY2015Q4	us-gaap	Pledged Assets Not Separately Reported On Statement Of Financial Position PledgedAssetsNotSeparatelyReportedOnStatementOfFinancialPosition	71649000000	USD
CY2016Q4	us-gaap	Pledged Assets Not Separately Reported On Statement Of Financial Position PledgedAssetsNotSeparatelyReportedOnStatementOfFinancialPosition	65222000000	USD
CY2015Q4	us-gaap	Pledged Assets Separately Reported Securities Pledged For Federal Home Loan Bank At Fair Value PledgedAssetsSeparatelyReportedSecuritiesPledgedForFederalHomeLoanBankAtFairValue	2506000000	USD
CY2016Q4	us-gaap	Pledged Assets Separately Reported Securities Pledged For Federal Home Loan Bank At Fair Value PledgedAssetsSeparatelyReportedSecuritiesPledgedForFederalHomeLoanBankAtFairValue	4881000000	USD
CY2015Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Other Debt Securities Available For Sale Or Held For Investment PledgedFinancialInstrumentsNotSeparatelyReportedOtherDebtSecuritiesAvailableForSaleOrHeldForInvestment	2420000000	USD
CY2016Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Other Debt Securities Available For Sale Or Held For Investment PledgedFinancialInstrumentsNotSeparatelyReportedOtherDebtSecuritiesAvailableForSaleOrHeldForInvestment	4895000000	USD
CY2014	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	410000000	USD
CY2015	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	293000000	USD
CY2016	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	342000000	USD
CY2016Q4	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	25
CY2014	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	219000000	USD
CY2015	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	187000000	USD
CY2016	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	182000000	USD
CY2015Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	82000000	USD
CY2016Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	80000000	USD
CY2014	us-gaap	Premiums Written Gross PremiumsWrittenGross	337000000	USD
CY2015	us-gaap	Premiums Written Gross PremiumsWrittenGross	315000000	USD
CY2016	us-gaap	Premiums Written Gross PremiumsWrittenGross	320000000	USD
CY2014	us-gaap	Premiums Written Net PremiumsWrittenNet	181000000	USD
CY2015	us-gaap	Premiums Written Net PremiumsWrittenNet	131000000	USD
CY2016	us-gaap	Premiums Written Net PremiumsWrittenNet	122000000	USD
CY2015Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	382000000	USD
CY2015Q4	us-gaap	Principal Amount Outstanding On Loans Managed And Securitized PrincipalAmountOutstandingOnLoansManagedAndSecuritized	116486000000	USD
CY2016Q4	us-gaap	Principal Amount Outstanding On Loans Managed And Securitized PrincipalAmountOutstandingOnLoansManagedAndSecuritized	124500000000	USD
CY2014	us-gaap	Proceeds From Contributions From Parent ProceedsFromContributionsFromParent	0	USD
CY2015	us-gaap	Proceeds From Contributions From Parent ProceedsFromContributionsFromParent	0	USD
CY2016	us-gaap	Proceeds From Contributions From Parent ProceedsFromContributionsFromParent	0	USD
CY2014	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	47000000	USD
CY2015	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	1049000000	USD
CY2016	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2014	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	27192000000	USD
CY2015	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	30665000000	USD
CY2016	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	14155000000	USD
CY2014	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	2657000000	USD
CY2015	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	4255000000	USD
CY2016	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	3379000000	USD
CY2014	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-1494000000	USD
CY2015	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	1028000000	USD
CY2016	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	4564000000	USD
CY2014	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	4260000000	USD
CY2015	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	6874000000	USD
CY2016	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	11036000000	USD
CY2014	us-gaap	Proceeds From Sale Of Loans And Leases Held For Investment ProceedsFromSaleOfLoansAndLeasesHeldForInvestment	2592000000	USD
CY2015	us-gaap	Proceeds From Sale Of Loans And Leases Held For Investment ProceedsFromSaleOfLoansAndLeasesHeldForInvestment	3197000000	USD
CY2016	us-gaap	Proceeds From Sale Of Loans And Leases Held For Investment ProceedsFromSaleOfLoansAndLeasesHeldForInvestment	4285000000	USD
CY2014	us-gaap	Proceeds From Sale Of Loans Held For Investment ProceedsFromSaleOfLoansHeldForInvestment	2592000000	USD
CY2015	us-gaap	Proceeds From Sale Of Loans Held For Investment ProceedsFromSaleOfLoansHeldForInvestment	3197000000	USD
CY2016	us-gaap	Proceeds From Sale Of Loans Held For Investment ProceedsFromSaleOfLoansHeldForInvestment	4285000000	USD
CY2014	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	62000000	USD
CY2015	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	1658000000	USD
CY2016	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	240000000	USD
CY2014	us-gaap	Professional Fees ProfessionalFees	100000000	USD
CY2015	us-gaap	Professional Fees ProfessionalFees	93000000	USD
CY2016	us-gaap	Professional Fees ProfessionalFees	103000000	USD
CY2015Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	691000000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	901000000	USD
CY2015Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	235000000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	376000000	USD
CY2015Q4	us-gaap	Property Subject To Or Available For Operating Lease Accumulated Depreciation PropertySubjectToOrAvailableForOperatingLeaseAccumulatedDepreciation	3940000000	USD
CY2016Q4	us-gaap	Property Subject To Or Available For Operating Lease Accumulated Depreciation PropertySubjectToOrAvailableForOperatingLeaseAccumulatedDepreciation	3114000000	USD
CY2015Q4	us-gaap	Property Subject To Or Available For Operating Lease Gross PropertySubjectToOrAvailableForOperatingLeaseGross	20211000000	USD
CY2016Q4	us-gaap	Property Subject To Or Available For Operating Lease Gross PropertySubjectToOrAvailableForOperatingLeaseGross	14584000000	USD
CY2015Q4	us-gaap	Property Subject To Or Available For Operating Lease Net PropertySubjectToOrAvailableForOperatingLeaseNet	16271000000	USD
CY2016Q4	us-gaap	Property Subject To Or Available For Operating Lease Net PropertySubjectToOrAvailableForOperatingLeaseNet	11470000000	USD
CY2015	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	707000000	USD
CY2016	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	917000000	USD
CY2014	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	457000000	USD
CY2015Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	116000000	USD
CY2015Q2	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	140000000	USD
CY2015Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	211000000	USD
CY2015Q4	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	240000000	USD
CY2015	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	707000000	USD
CY2016Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	220000000	USD
CY2016Q2	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	172000000	USD
CY2016Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	258000000	USD
CY2016Q4	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	267000000	USD
CY2016	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	917000000	USD
CY2015Q4	us-gaap	Qualitative And Quantitative Information Transferors Continuing Involvement Arrangements Of Financial Support Amount QualitativeAndQuantitativeInformationTransferorsContinuingInvolvementArrangementsOfFinancialSupportAmount	99000000	USD
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CY2015Q4	us-gaap	Reinsurance Receivables Incurred But Not Reported Claims ReinsuranceReceivablesIncurredButNotReportedClaims	120000000	USD
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CY2016	us-gaap	Loss Contingency Disclosures LossContingencyDisclosures	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:10px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Contingencies and Other Risks</font></div><div style="line-height:120%;padding-top:2px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Concentration with GM and Chrysler</font></div><div style="line-height:120%;padding-top:2px;text-align:left;text-indent:24px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">While we are continuing to diversify our automotive finance and insurance businesses and to expand into other financial services, General Motors Company (GM) and Fiat Chrysler Automobiles US LLC (Chrysler) dealers and their retail customers continue to constitute a significant portion of our customer base. GM, Chrysler, and their captive finance companies compete forcefully with us and could take further actions that negatively impact the amount of business that we do with GM and Chrysler dealers and their customers. Further, a significant adverse change in GM’s or Chrysler’s business—including, for example, in the production or sale of GM or Chrysler vehicles, the quality or resale value of GM or Chrysler vehicles, GM’s or Chrysler’s relationships with its key suppliers, or the rate or volume of recalls of GM or Chrysler vehicles—could negatively impact our GM and Chrysler dealer and retail customer bases. Any future reductions in GM and Chrysler business that we are not able to offset could adversely affect our business and financial results.</font></div><div style="line-height:120%;padding-top:10px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Legal Matters</font></div><div style="line-height:120%;padding-top:2px;text-align:left;text-indent:24px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Ally and its subsidiaries, including Ally Bank, </font><font style="font-family:inherit;font-size:9pt;">are or may be subject to potential liability in connection with pending or threatened legal proceedings and other matters. These legal matters may be formal or informal and include litigation and arbitration with one or more identified claimants, certified or purported class actions with yet-to-be-identified claimants, and regulatory or other governmental information-gathering requests, examinations, investigations, and enforcement proceedings. Our legal matters exist in varying stages of adjudication, arbitration, negotiation, or investigation and span our lines of business and operations. Claims may be based in law or equity—such as those arising under contracts or in tort and those involving banking, consumer-protection, securities, tax, employment, and other laws—and some can present novel legal theories and allege substantial or indeterminate damages.</font></div><div style="line-height:120%;padding-top:10px;text-align:left;text-indent:24px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">We accrue for a legal matter when a loss becomes probable and the amount of loss can be reasonably estimated. Accruals are evaluated each quarter and may be adjusted, upward or downward, based on our best judgment after consultation with counsel. No assurance exists that our accruals will not need to be adjusted in the future.</font></div><div style="line-height:120%;padding-top:10px;text-align:left;text-indent:24px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">The course and outcome of legal matters are inherently unpredictable. This is especially so when a matter is still in its early stages, the damages sought are indeterminate or unsupported, significant facts are unclear or disputed, novel questions of law or other meaningful legal uncertainties exist, a request to certify a proceeding as a class action is outstanding or granted, multiple parties are named, or regulatory or other governmental entities are involved. As a result, we cannot state with confidence how or when threatened or pending legal matters will be resolved and what losses may be incurred. Actual losses may be higher or lower than any amounts accrued for those matters, possibly to a significant degree.</font></div><div style="line-height:120%;padding-top:10px;text-align:left;text-indent:24px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">On the basis of information currently available, advice of counsel, available insurance coverage, and established reserves, it is the opinion of management that, except as described in the next paragraph, the eventual outcome of our existing legal matters will not have a material adverse effect on our consolidated financial condition, results of operations, or cash flows. It is possible, however, that an unfavorable resolution of legal matters may be material to our consolidated financial condition, results of operations, or cash flows in a particular period.</font></div><div style="line-height:120%;padding-top:10px;text-align:left;text-indent:24px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Descriptions of our material legal matters follow. In each case, the matter </font><font style="font-family:inherit;font-size:9pt;">could have material adverse consequences for us, including substantial damages or settlements, injunctions, governmental fines or penalties, and reputational or operational risks.</font><font style="font-family:inherit;font-size:9pt;"> We do not believe, however, that an estimate of reasonably possible losses or a range of reasonably possible losses in excess of established reserves—whether in excess of any related accrual or where no accrual exists—can be made for any of these matters.</font></div><div style="line-height:120%;padding-top:10px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Securities Litigation</font></div><div style="line-height:120%;padding-top:2px;text-align:left;text-indent:24px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">In October 2016, a purported class action—Bucks County Employees Retirement Fund v. Ally Financial Inc. et al.—was filed in the Circuit Court for Wayne County in the State of Michigan. This matter was removed to the U.S. District Court for the Eastern District of Michigan on November 18, 2016, and is currently pending there as Case No. 2:16-CV-14104. The complaint alleges material misstatements and omissions in connection with Ally’s initial public offering in April 2014, including a failure to adequately disclose the severity of rising subprime automotive loan delinquency rates, deficient underwriting measures employed in the origination of subprime automotive loans, and aggressive tactics used with low-income borrowers. The request for relief includes an indeterminate amount of damages, fees, and costs and other remedies. In January 2017, another purported class action—National Shopmen Pension Fund v. Ally Financial Inc. et al.—was filed in the Circuit Court for Oakland County in the State of Michigan. This matter was removed to the U.S. District Court for the Eastern District of Michigan on January 30, 2017, and is currently pending there as Case No. 2:17-CV-10289. The allegations and requested relief in the complaint are substantially similar to those included in the complaint filed by Bucks County Employees Retirement Fund. We intend to vigorously defend against these actions.</font></div><div style="line-height:120%;padding-top:10px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Automotive Subprime Matters</font></div><div style="line-height:120%;padding-top:2px;text-align:left;text-indent:24px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">In October 2014, we received a document request from the SEC in connection with its investigation related to subprime automotive finance and related securitization activities. Separately, in December 2014, we received a subpoena from the DOJ requesting similar information. In May 2015 and December 2016, we received information requests from the New York Department of Financial Services requesting similar information. We have cooperated with each of these agencies with respect to these matters.</font></div><div style="line-height:120%;padding-top:10px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Indirect Automotive Finance Matters</font></div><div style="line-height:120%;padding-top:2px;text-align:left;text-indent:24px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">In December 2013, Ally Financial Inc. and Ally Bank entered into a Consent Order issued by the U.S. Consumer Financial Protection Bureau (CFPB) and a Consent Order jointly submitted with the DOJ and entered by the U.S. District Court for the Eastern District of Michigan (United States v. Ally Financial Inc. and Ally Bank, Civil Action No. 13-15180), in each case, pertaining to allegations of discrimination involving the automotive finance business. The Consent Orders require Ally to create a compliance plan addressing, at a minimum, the communication of Ally’s expectations of Equal Credit Opportunity Act (ECOA) compliance to our automotive dealer clients, maintenance of Ally’s existing limits on dealer finance income for contracts acquired by Ally, and monitoring for potential discrimination both at the dealer level and within our portfolio of contracts acquired across all of our automotive dealer clients. Ally formed a compliance committee consisting of certain Ally Financial Inc. and Ally Bank directors to oversee Ally’s execution of the Consent Orders’ terms. Ally is required to meet certain stipulations under the Consent Orders, including a requirement to make monetary payments when ongoing remediation targets are not attained.</font></div><div style="line-height:120%;padding-top:10px;text-align:left;text-indent:24px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Since 2013, Ally has recognized expenses of approximately </font><font style="font-family:inherit;font-size:9pt;">$240 million</font><font style="font-family:inherit;font-size:9pt;"> for judgments, fines, and monetary remuneration payments to customers related to the Consent Orders. The Consent Orders terminate, according to their terms, in 2017, and preclude the CFPB and the DOJ from pursuing any potential violations of the ECOA against Ally Financial Inc. or Ally Bank for conduct undertaken pursuant to the Consent Orders during the period of the Consent Orders. If the CFPB or the DOJ were to assert that Ally Financial Inc. or Ally Bank is violating the ECOA after the Consent Orders terminate, further legal proceedings could occur.</font></div><div style="line-height:120%;padding-top:10px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Mortgage Matters</font></div><div style="line-height:120%;padding-top:2px;text-align:left;text-indent:24px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">We previously disclosed investigations by the DOJ relating to residential mortgage-backed securities issued by our former mortgage subsidiary, Residential Capital, LLC and its subsidiaries (ResCap RMBS). The DOJ was investigating potential fraud and other potential legal claims related to ResCap RMBS, including potential claims under the Financial Institutions Reform, Recovery, and Enforcement Act of 1989, as well as potential claims under the False Claims Act related to representations made by us in connection with investments in Ally Financial Inc. made by the U.S. Department of the Treasury pursuant to the Troubled Asset Relief Program in 2008 and 2009 regarding certain claims against Residential Capital, LLC or its subsidiaries at that time.</font></div><div style="line-height:120%;padding-top:10px;text-align:left;text-indent:24px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">On November 21, 2016, we comprehensively resolved these investigations and potential claims with the DOJ and entered into a settlement agreement. Under the agreement, we in 2016 (1) paid </font><font style="font-family:inherit;font-size:9pt;">$52 million</font><font style="font-family:inherit;font-size:9pt;"> to the DOJ, which is included in discontinued operations, (2) withdrew the broker-dealer registration for Ally Securities LLC (formerly known as Residential Funding Securities LLC) (Ally Securities), which is one of our wholly-owned subsidiaries, and (3) began to wind down the affairs of Ally Securities.</font></div><div style="line-height:120%;padding-top:10px;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Other Contingencies</font></div><div style="line-height:120%;padding-top:2px;text-align:left;text-indent:24px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Ally and its subsidiaries, including Ally Bank, </font><font style="font-family:inherit;font-size:9pt;">are or may be subject to potential liability under various other contingent exposures, including indemnification, tax, self-insurance, and other miscellaneous contingencies. We accrue for a contingent exposure when a loss becomes probable and the amount of loss can be reasonably estimated. Accruals are evaluated each quarter and may be adjusted, upward or downward, based on our best judgment. No assurance exists that our accruals will not need to be adjusted in the future, and actual losses may be higher or lower than any amounts accrued for those exposures, possibly to a significant degree. On the basis of information currently available, available insurance coverage, and established reserves, it is the opinion of management that the eventual outcome of our other contingent exposures will not have a material adverse effect on our consolidated financial condition, results of operations, or cash flows.</font></div></div>
CY2016	us-gaap	Premiums Receivable Note PremiumsReceivableNote	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:10px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Premiums Receivable and Other Insurance Assets</font></div><div style="line-height:120%;padding-top:2px;text-indent:24px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Premiums receivable and other insurance assets consisted of the following.</font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="9" rowspan="1"></td></tr><tr><td style="width:76%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:9%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:9%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">December 31, (</font><font style="font-family:inherit;font-size:9pt;font-style:italic;">$ in millions</font><font style="font-family:inherit;font-size:9pt;">)</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">2016</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">2015</font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Prepaid reinsurance premiums</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">439</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">382</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Reinsurance recoverable on unpaid losses</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">108</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">120</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Reinsurance recoverable on paid losses</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">20</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">18</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Premiums receivable</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">80</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">82</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Deferred policy acquisition costs</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">1,258</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">1,199</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Total premiums receivable and other insurance assets</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">$</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">1,905</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">1,801</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr></table></div></div></div>
CY2016	us-gaap	Revenue Recognition Deferred Revenue RevenueRecognitionDeferredRevenue	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:2px;text-indent:24px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Insurance premiums, net of premiums ceded to reinsurers, and service revenue are earned over the terms of the policies. The portion of premiums and service revenue written applicable to the unexpired terms of the policies is recorded as unearned insurance premiums or unearned service revenue. For extended service and maintenance contracts, premiums and service revenues are earned on a basis proportionate to the anticipated cost emergence. For other short duration contracts, premiums and unearned service revenue are earned on a pro rata basis. For further information, refer to </font><font style="font-family:inherit;font-size:9pt;">Note 4</font><font style="font-family:inherit;font-size:9pt;"> to the </font><font style="font-family:inherit;font-size:9pt;">Consolidated Financial Statements</font><font style="font-family:inherit;font-size:9pt;">.</font></div></div>
CY2016	us-gaap	Revenue Recognition Leases Operating RevenueRecognitionLeasesOperating	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:2px;text-align:left;text-indent:24px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Investment in operating leases, net, represents the automobiles that are underlying the automotive lease contracts and is reported at cost, less accumulated depreciation and net of impairment charges and origination fees or costs. Depreciation of vehicles is recorded on a straight-line basis to an estimated residual value over the lease term. Manufacturer support payments that we receive upfront are treated as a reduction to the cost-basis in the underlying lease asset, which has the effect of reducing depreciation expense over the life of the contract. We periodically evaluate our depreciation rate for leased vehicles based on expected residual values and adjust depreciation expense over the remaining life of the lease if deemed appropriate. Income from operating lease assets that includes lease origination fees, net of lease origination costs, is recognized as operating lease revenue on a straight-line basis over the scheduled lease term.</font></div><div style="line-height:120%;padding-top:10px;text-indent:24px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">We have significant investments in the residual values of the assets in our operating lease portfolio. The residual values represent an estimate of the values of the assets at the end of the lease contracts. At contract inception, we determine pricing based on the projected residual value of the lease vehicle. This evaluation is primarily based on a proprietary model, which includes variables such as age, expected mileage, seasonality, segment factors, vehicle type, economic indicators, production cycle, automotive manufacturer incentives, and shifts in used vehicle supply. This internally-generated data is compared against third-party, independent data for reasonableness. Realization of the residual values is dependent on our future ability to market the vehicles under the prevailing market conditions. Over the life of the lease, we evaluate the adequacy of our estimate of the residual value and may make adjustments to the depreciation rates to the extent the expected value of the vehicle at lease termination changes. In addition to estimating the residual value at lease termination, we also evaluate the current value of the operating lease asset and test for impairment to the extent necessary based on market considerations and portfolio characteristics. Impairment is determined to exist if fair value of the leased asset is less than carrying value and it is determined that the net carrying value is not recoverable. The net carrying value of a leased asset is not recoverable if it exceeds the sum of the undiscounted expected future cash flows expected to result from the lease payments and the estimated residual value upon eventual disposition. No impairment was recognized in</font><font style="font-family:inherit;font-size:9pt;"> </font><font style="font-family:inherit;font-size:9pt;">2016</font><font style="font-family:inherit;font-size:9pt;">, </font><font style="font-family:inherit;font-size:9pt;">2015</font><font style="font-family:inherit;font-size:9pt;">, or </font><font style="font-family:inherit;font-size:9pt;">2014</font><font style="font-family:inherit;font-size:9pt;">.</font><font style="font-family:inherit;font-size:9pt;"> If our operating lease assets are considered to be impaired, the impairment is measured as the amount by which the carrying amount of the assets exceeds the fair value as estimated by discounted cash flows. We accrue rental income on our operating leases when collection is reasonably assured. We generally discontinue the accrual of revenue on operating leases at the time an account is determined to be uncollectible, at the earliest of time of repossession, within 60 days of bankruptcy notification and greater than 60 days past due, or greater than 120 days past due.</font></div><div style="line-height:120%;padding-top:10px;text-indent:24px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">When a lease vehicle is returned to us, the asset is reclassified from investment in operating leases, net, to other assets and recorded at the lower-of-cost or estimated fair value, less costs to sell, on our Consolidated Balance Sheet. Any losses recognized at this time are recorded as depreciation expense. Any gain or loss recognized at the time of sale of an off lease or repossessed lease vehicle is recognized as a remarketing gain or loss and presented as a component of depreciation expense.</font></div></div>
CY2016	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:2px;text-indent:24px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and that affect income and expenses during the reporting period and related disclosures. In developing the estimates and assumptions, management uses all available evidence; however, actual results could differ because of uncertainties associated with estimating the amounts, timing, and likelihood of possible outcomes. Our most significant estimates pertain to the allowance for loan losses, valuations of automotive lease assets and residuals, fair value of financial instruments, legal and regulatory reserves, and the determination of the provision for income taxes.</font></div></div>
CY2016	us-gaap	Schedule Of Liability For Unpaid Claims And Claims Adjustment Expense ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:10px;text-align:left;text-indent:24px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">The following table shows a rollforward of our reserves for insurance losses and loss adjustment expenses.</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="4" rowspan="1"></td></tr><tr><td style="width:89%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:9%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-style:italic;">($ in millions)</font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Total gross reserves for insurance losses and loss adjustment expenses at January 1, 2016</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">169</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Less: Reinsurance recoverable</font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">120</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Net reserves for insurance losses and loss adjustment expenses at January 1, 2016</font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">49</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Net insurance losses and loss adjustment expenses incurred related to:</font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-indent:12px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Current year</font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">345</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-indent:12px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Prior years (a)</font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">(3</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">)</font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Total net insurance losses and loss adjustment expenses incurred</font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">342</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Net insurance losses and loss adjustment expenses paid or payable related to:</font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-indent:12px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Current year</font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">(320</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">)</font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-indent:12px;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Prior years</font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">(30</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">)</font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Total net insurance losses and loss adjustment expenses paid or payable</font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">(350</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">)</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Net reserves for insurance losses and loss adjustment expenses at December 31, 2016</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">41</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Plus: Reinsurance recoverable</font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">108</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Total gross reserves for insurance losses and loss adjustment expenses at December 31, 2016</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">$</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">149</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr></table></div></div><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:8pt;padding-left:0px;"><font style="font-family:inherit;font-size:8pt;">(a)</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:left;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;">There have been no material adverse changes to the reserve for prior years.</font></div></td></tr></table></div>

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2016 Form 10-K Financial Statement

#000004072917000067 Filed on February 27, 2017

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$ALLY Ally Financial Inc. Stock $ally

2016 Form 10-K Financial Statement

#000004072917000067 Filed on February 27, 2017

Income Statement

Balance Sheet

Cashflow Statement

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Files In Submission

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Ally Financial Inc. Stock $ally