$DFS
Discover Financial Services Stock $dfs

$dfs Overview Financials Valuation SEC Filings Company Website

2017 Q4 Form 10-K Financial Statement

#000139361219000011 Filed on February 20, 2019

Income Statement

Concept	2017 Q4	2017 Q3	2017 Q2
Revenue	$2.556B	$2.476B	$2.338B
YoY Change	13.2%	13.37%	11.87%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development		$78.00M	$77.00M
YoY Change		-3.7%	-13.48%
% of Gross Profit
Depreciation & Amortization	$104.0M	$101.0M	$95.00M
YoY Change	16.85%	17.44%	3.26%
% of Gross Profit
Operating Expenses		$78.00M	$77.00M
YoY Change		-3.7%	-13.48%
Operating Profit
YoY Change
Interest Expense	$436.0M	$426.0M	$400.0M
YoY Change	19.13%	18.66%	17.99%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$899.0M	$903.0M	$867.0M
YoY Change	1.81%	-6.04%	-3.45%
Income Tax	$512.0M	$301.0M	$321.0M
% Of Pretax Income	56.95%	33.33%	37.02%
Net Earnings	$387.0M	$602.0M	$546.0M
YoY Change	-31.26%	-5.79%	-11.36%
Net Earnings / Revenue	15.14%	24.31%	23.35%
Basic Earnings Per Share	$0.99	$1.59	$1.41
Diluted Earnings Per Share	$0.99	$1.59	$1.40
COMMON SHARES
Basic Shares Outstanding	363.4M shares	371.0M shares	379.0M shares
Diluted Shares Outstanding		371.0M shares	379.0M shares

Balance Sheet

Concept	2017 Q4	2017 Q3	2017 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$14.87B	$14.88B	$14.63B
YoY Change	8.8%	6.78%	11.77%
Cash & Equivalents	$13.31B	$13.25B	$12.95B
Short-Term Investments	$1.568B	$1.627B	$1.679B
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$825.0M	$800.0M	$774.0M
YoY Change	12.4%	10.8%	9.32%
Goodwill	$255.0M	$255.0M	$255.0M
YoY Change	0.0%	0.0%	0.0%
Intangibles	$163.0M	$163.0M	$164.0M
YoY Change	-1.81%	-1.81%	-1.8%
Long-Term Investments	$297.0M	$349.0M	$332.0M
YoY Change	-8.9%	17.11%	6.41%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$100.1B	$97.61B	$93.76B
YoY Change	8.43%	7.81%	7.14%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$4.105B	$3.549B	$3.196B
YoY Change	15.63%	13.79%	9.98%
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due	$5.272B	$1.201B	$2.201B
YoY Change	3.37%	-3.92%	76.08%
Total Short-Term Liabilities	$9.377B	$4.750B	$5.397B
YoY Change	8.4%	8.72%	29.86%
LONG-TERM LIABILITIES
Long-Term Debt	$21.05B	$25.54B	$24.24B
YoY Change	3.5%	-0.17%	3.44%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$21.05B	$25.54B	$24.24B
YoY Change	3.5%	-0.17%	3.44%
TOTAL LIABILITIES
Total Short-Term Liabilities	$9.377B	$4.750B	$5.397B
Total Long-Term Liabilities	$21.05B	$25.54B	$24.24B
Total Liabilities	$89.20B	$86.42B	$82.50B
YoY Change	10.14%	9.13%	8.39%
SHAREHOLDERS EQUITY
Retained Earnings	$16.69B	$16.45B	$15.99B
YoY Change	10.29%	11.95%	12.69%
Common Stock	$6.000M	$6.000M	$6.000M
YoY Change	20.0%	20.0%	20.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$10.25B	$9.699B	$9.143B
YoY Change	25.46%	26.04%	28.52%
Treasury Stock Shares	205.6M shares	197.4M shares	188.3M shares
Shareholders Equity	$10.89B	$11.19B	$11.26B
YoY Change
Total Liabilities & Shareholders Equity	$100.1B	$97.61B	$93.76B
YoY Change	8.43%	7.81%	7.14%

Cashflow Statement

Concept	2017 Q4	2017 Q3	2017 Q2
OPERATING ACTIVITIES
Net Income	$387.0M	$602.0M	$546.0M
YoY Change	-31.26%	-5.79%	-11.36%
Depreciation, Depletion And Amortization	$104.0M	$101.0M	$95.00M
YoY Change	16.85%	17.44%	3.26%
Cash From Operating Activities	$1.624B	$1.552B	$1.019B
YoY Change	25.7%	17.84%	54.86%
INVESTING ACTIVITIES
Capital Expenditures	-$57.00M	-$58.00M	-$56.00M
YoY Change	21.28%	26.09%	40.0%
Acquisitions
YoY Change
Other Investing Activities	-$4.230B	-$2.861B	-$1.512B
YoY Change	88.17%	45.89%	-1.69%
Cash From Investing Activities	-$4.287B	-$2.919B	-$1.568B
YoY Change	86.8%	45.44%	-0.63%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	1.522B	2.850B	-1.664B
YoY Change	81.84%	32.62%	178.26%
NET CHANGE
Cash From Operating Activities	1.624B	1.552B	1.019B
Cash From Investing Activities	-4.287B	-2.919B	-1.568B
Cash From Financing Activities	1.522B	2.850B	-1.664B
Net Change In Cash	-1.141B	1.483B	-2.213B
YoY Change	587.35%	1.64%	45.78%
FREE CASH FLOW
Cash From Operating Activities	$1.624B	$1.552B	$1.019B
Capital Expenditures	-$57.00M	-$58.00M	-$56.00M
Free Cash Flow	$1.681B	$1.610B	$1.075B
YoY Change	25.54%	18.12%	54.01%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2018	dei	Amendment Flag AmendmentFlag	false
CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
CY2018	dei	Document Type DocumentType	10-K
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CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2018	dei	Entity Registrant Name EntityRegistrantName	Discover Financial Services
CY2018	dei	Entity Shell Company EntityShellCompany	false
CY2018	dei	Entity Small Business EntitySmallBusiness	false
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CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	13299000000	USD
CY2017Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	1300000000	USD
CY2018Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	728000000	USD
CY2015Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	9671000000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	12009000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	13387000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	15145000000	USD
CY2016	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	2338000000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	1378000000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	1758000000	USD
CY2015Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	965000000	USD
CY2016Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	796000000	USD
CY2017Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	669000000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	548000000	USD
CY2016	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	185000000	USD
CY2017	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	159000000	USD
CY2018	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	139000000	USD
CY2016	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications To From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference	16000000	USD
CY2017	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications To From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference	32000000	USD
CY2018	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications To From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference	18000000	USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2016	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.16
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.3
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.5
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2000000000	shares
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2000000000	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	563497702	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	564851848	shares
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	6000000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	6000000	USD
CY2016	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	339000000	USD
CY2017	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	315000000	USD
CY2018	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	350000000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2392000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2108000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2767000000	USD
CY2018Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More After12 Months ContractualMaturitiesTimeDeposits100000OrMoreAfter12Months	2363000000	USD
CY2018Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Six Months Through12 Months ContractualMaturitiesTimeDeposits100000OrMoreSixMonthsThrough12Months	2459000000	USD
CY2018Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Or Less ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsOrLess	994000000	USD
CY2018Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Through Six Months ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsThroughSixMonths	1025000000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1066000000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1056000000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	839000000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1215000000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1152000000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1045000000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	149000000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	96000000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	206000000	USD
CY2016	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2017	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2018	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2017Q4	us-gaap	Deferred Costs Credit Card Origination Costs Amount DeferredCostsCreditCardOriginationCostsAmount	125000000	USD
CY2018Q4	us-gaap	Deferred Costs Credit Card Origination Costs Amount DeferredCostsCreditCardOriginationCostsAmount	138000000	USD
CY2017Q4	us-gaap	Deferred Discounts Finance Charges And Interest Included In Receivables DeferredDiscountsFinanceChargesAndInterestIncludedInReceivables	47000000	USD
CY2018Q4	us-gaap	Deferred Discounts Finance Charges And Interest Included In Receivables DeferredDiscountsFinanceChargesAndInterestIncludedInReceivables	52000000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	45000000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	288000000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-163000000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	48000000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	286000000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-190000000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	372000000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	404000000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	3000000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-2000000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-27000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	628000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	839000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	253000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	434000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	625000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	838000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	40000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	44000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	66000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	65000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	522000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	730000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	3000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	24000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	26000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	53000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	48000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	109000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	137000000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Expected Future Employer Contributions Next Fiscal Year DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear	0	USD
CY2016	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	59000000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	64000000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	69000000	USD
CY2017Q4	us-gaap	Deposits Deposits	58764000000	USD
CY2018Q4	us-gaap	Deposits Deposits	67759000000	USD
CY2017Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	28413000000	USD
CY2018Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	32296000000	USD
CY2016	us-gaap	Depreciation And Amortization DepreciationAndAmortization	77000000	USD
CY2017	us-gaap	Depreciation And Amortization DepreciationAndAmortization	76000000	USD
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	75000000	USD
CY2017Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	1000000	USD
CY2018Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	8000000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	6000000	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	13000000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	5000000	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	5000000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	3000000	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	2000000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	0	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	0	USD
CY2016	us-gaap	Dividends Common Stock DividendsCommonStock	476000000	USD
CY2017	us-gaap	Dividends Common Stock DividendsCommonStock	490000000	USD
CY2018	us-gaap	Dividends Common Stock DividendsCommonStock	521000000	USD
CY2016	us-gaap	Dividends Preferred Stock DividendsPreferredStock	37000000	USD
CY2017	us-gaap	Dividends Preferred Stock DividendsPreferredStock	37000000	USD
CY2018	us-gaap	Dividends Preferred Stock DividendsPreferredStock	31000000	USD
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.77
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.43
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.41
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.59
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.99
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.43
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.82
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.91
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.05
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.04
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	7.81
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.77
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CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.40
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.59
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.99
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.42
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.82
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.91
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.05
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.03
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	7.79
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.345
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.407
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.238
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.014
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.012
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.005
CY2016	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.027
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.031
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.036
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.018
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.013
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.013
CY2016	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	24000000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	28000000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	15000000	USD
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	2306000000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	2646000000	USD
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	286000000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	370000000	USD
CY2016	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	473000000	USD
CY2017	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	499000000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	570000000	USD
CY2016	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	2034000000	USD
CY2017	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	2618000000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	3182000000	USD
CY2017Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	80547000000	USD
CY2018Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	86237000000	USD
CY2017Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	1617000000	USD
CY2018Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	2638000000	USD
CY2017Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	754000000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	851000000	USD
CY2017Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	233000000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	302000000	USD
CY2017Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	1806000000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	2049000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	69000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	71000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	77000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	77000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	8000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	6000000	USD
CY2016	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-57000000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-55000000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-45000000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	255000000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	255000000	USD
CY2017Q4	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018Q4	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2017Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	173000000	USD
CY2018Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	237000000	USD
CY2017Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	1000000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	0	USD
CY2017Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	1000000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	4000000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	0	USD
CY2018Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	0	USD
CY2018Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	0	USD
CY2018Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	0	USD
CY2018Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	233000000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	237000000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	0	USD
CY2018Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	0	USD
CY2017Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	173000000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	233000000	USD
CY2017Q4	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2018Q4	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	3656000000	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	868000000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	867000000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	903000000	USD
CY2017Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	899000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	3537000000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	856000000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	877000000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	967000000	USD
CY2018Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	897000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	3597000000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1263000000	USD
CY2017Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	304000000	USD
CY2017Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	321000000	USD
CY2017Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	301000000	USD
CY2017Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	512000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1438000000	USD
CY2018Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	190000000	USD
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	208000000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	247000000	USD
CY2018Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	210000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	855000000	USD
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1300000000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1424000000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	650000000	USD
CY2016	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	4453000000	USD
CY2017	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	6753000000	USD
CY2018	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	8961000000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	187000000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	502000000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	7000000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	234000000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	622000000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-549000000	USD
CY2017Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	155000000	USD
CY2018Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	155000000	USD
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	163000000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	161000000	USD
CY2016	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	8616000000	USD
CY2017Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	2278000000	USD
CY2017Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	2338000000	USD
CY2017Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	2476000000	USD
CY2017Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	2556000000	USD
CY2017	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9648000000	USD
CY2018Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	2569000000	USD
CY2018Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	2636000000	USD
CY2018Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	2781000000	USD
CY2018Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	2907000000	USD
CY2018	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10893000000	USD
CY2016	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	38000000	USD
CY2017	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	27000000	USD
CY2018	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	40000000	USD
CY2016	us-gaap	Interest And Fee Income Loans Consumer Installment Credit Card InterestAndFeeIncomeLoansConsumerInstallmentCreditCard	7155000000	USD
CY2017	us-gaap	Interest And Fee Income Loans Consumer Installment Credit Card InterestAndFeeIncomeLoansConsumerInstallmentCreditCard	7907000000	USD
CY2018	us-gaap	Interest And Fee Income Loans Consumer Installment Credit Card InterestAndFeeIncomeLoansConsumerInstallmentCreditCard	8835000000	USD
CY2016	us-gaap	Interest And Fee Income Loans Other Consumer InterestAndFeeIncomeLoansOtherConsumer	1361000000	USD
CY2017	us-gaap	Interest And Fee Income Loans Other Consumer InterestAndFeeIncomeLoansOtherConsumer	1560000000	USD
CY2018	us-gaap	Interest And Fee Income Loans Other Consumer InterestAndFeeIncomeLoansOtherConsumer	1726000000	USD
CY2017Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	58165000000	USD
CY2018Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	67084000000	USD
CY2017Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	12000000000	USD
CY2018Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	12600000000	USD
CY2016	us-gaap	Interest Expense InterestExpense	1398000000	USD
CY2017Q1	us-gaap	Interest Expense InterestExpense	386000000	USD
CY2017Q2	us-gaap	Interest Expense InterestExpense	400000000	USD
CY2017Q3	us-gaap	Interest Expense InterestExpense	426000000	USD
CY2017Q4	us-gaap	Interest Expense InterestExpense	436000000	USD
CY2017	us-gaap	Interest Expense InterestExpense	1648000000	USD
CY2018Q1	us-gaap	Interest Expense InterestExpense	469000000	USD
CY2018Q2	us-gaap	Interest Expense InterestExpense	507000000	USD
CY2018Q3	us-gaap	Interest Expense InterestExpense	558000000	USD
CY2018Q4	us-gaap	Interest Expense InterestExpense	605000000	USD
CY2018	us-gaap	Interest Expense InterestExpense	2139000000	USD
CY2016	us-gaap	Interest Expense Deposits InterestExpenseDeposits	687000000	USD
CY2017	us-gaap	Interest Expense Deposits InterestExpenseDeposits	846000000	USD
CY2018	us-gaap	Interest Expense Deposits InterestExpenseDeposits	1238000000	USD
CY2016	us-gaap	Interest Expense Domestic Deposit Liabilities Withdrawal Penalties InterestExpenseDomesticDepositLiabilitiesWithdrawalPenalties	2000000	USD
CY2017	us-gaap	Interest Expense Domestic Deposit Liabilities Withdrawal Penalties InterestExpenseDomesticDepositLiabilitiesWithdrawalPenalties	2000000	USD
CY2018	us-gaap	Interest Expense Domestic Deposit Liabilities Withdrawal Penalties InterestExpenseDomesticDepositLiabilitiesWithdrawalPenalties	3000000	USD
CY2016	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	711000000	USD
CY2017	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	802000000	USD
CY2018	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	901000000	USD
CY2016	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	5359000000	USD
CY2017	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	5421000000	USD
CY2018	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	5719000000	USD
CY2016	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	7218000000	USD
CY2017Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1892000000	USD
CY2017Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1938000000	USD
CY2017Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	2050000000	USD
CY2017Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	2120000000	USD
CY2017	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8000000000	USD
CY2018Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	2100000000	USD
CY2018Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	2129000000	USD
CY2018Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	2223000000	USD
CY2018Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	2302000000	USD
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8754000000	USD
CY2016	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	0	USD
CY2017	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	0	USD
CY2018	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	0	USD
CY2016	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	38000000	USD
CY2017	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	27000000	USD
CY2018	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	40000000	USD
CY2016	us-gaap	Interest Paid Net InterestPaidNet	1211000000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	1396000000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	1847000000	USD
CY2016	us-gaap	Labor And Related Expense LaborAndRelatedExpense	1379000000	USD
CY2017	us-gaap	Labor And Related Expense LaborAndRelatedExpense	1512000000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	1627000000	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	15000000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	14000000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	15000000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	89195000000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	98423000000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	100087000000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	109553000000	USD
CY2015Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	1869000000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	2167000000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	2621000000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	3041000000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	84248000000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	90512000000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	81627000000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	87471000000	USD
CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	26326000000	USD
CY2018Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	27228000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	6493000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	6511000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	3328000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	2806000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	3383000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	4707000000	USD
CY2017Q4	us-gaap	Marketable Securities MarketableSecurities	1568000000	USD
CY2018Q4	us-gaap	Marketable Securities MarketableSecurities	3370000000	USD
CY2016	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	731000000	USD
CY2017	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	776000000	USD
CY2018	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	857000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	2811000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	4961000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	7146000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-4898000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-8791000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-10579000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4425000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	5208000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	5191000000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	2393000000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	564000000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	546000000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	602000000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	387000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	2099000000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	666000000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	669000000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	720000000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	687000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	2742000000	USD
CY2016	us-gaap	Net Income Loss Attributable To Parent Diluted NetIncomeLossAttributableToParentDiluted	2339000000	USD
CY2017	us-gaap	Net Income Loss Attributable To Parent Diluted NetIncomeLossAttributableToParentDiluted	2031000000	USD
CY2018	us-gaap	Net Income Loss Attributable To Parent Diluted NetIncomeLossAttributableToParentDiluted	2689000000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2356000000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2047000000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2711000000	USD
CY2017Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	599000000	USD
CY2018Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	675000000	USD
CY2016	us-gaap	Noninterest Expense NoninterestExpense	3584000000	USD
CY2017Q1	us-gaap	Noninterest Expense NoninterestExpense	885000000	USD
CY2017Q2	us-gaap	Noninterest Expense NoninterestExpense	912000000	USD
CY2017Q3	us-gaap	Noninterest Expense NoninterestExpense	948000000	USD
CY2017Q4	us-gaap	Noninterest Expense NoninterestExpense	1036000000	USD
CY2017	us-gaap	Noninterest Expense NoninterestExpense	3781000000	USD
CY2018Q1	us-gaap	Noninterest Expense NoninterestExpense	968000000	USD
CY2018Q2	us-gaap	Noninterest Expense NoninterestExpense	984000000	USD
CY2018Q3	us-gaap	Noninterest Expense NoninterestExpense	1015000000	USD
CY2018Q4	us-gaap	Noninterest Expense NoninterestExpense	1110000000	USD
CY2018	us-gaap	Noninterest Expense NoninterestExpense	4077000000	USD
CY2016	us-gaap	Noninterest Income NoninterestIncome	1881000000	USD
CY2017Q1	us-gaap	Noninterest Income NoninterestIncome	447000000	USD
CY2017Q2	us-gaap	Noninterest Income NoninterestIncome	481000000	USD
CY2017Q3	us-gaap	Noninterest Income NoninterestIncome	475000000	USD
CY2017Q4	us-gaap	Noninterest Income NoninterestIncome	494000000	USD
CY2017	us-gaap	Noninterest Income NoninterestIncome	1897000000	USD
CY2018Q1	us-gaap	Noninterest Income NoninterestIncome	475000000	USD
CY2018Q2	us-gaap	Noninterest Income NoninterestIncome	474000000	USD
CY2018Q3	us-gaap	Noninterest Income NoninterestIncome	501000000	USD
CY2018Q4	us-gaap	Noninterest Income NoninterestIncome	505000000	USD
CY2018	us-gaap	Noninterest Income NoninterestIncome	1955000000	USD
CY2016	us-gaap	Noninterest Income Other NoninterestIncomeOther	89000000	USD
CY2017	us-gaap	Noninterest Income Other NoninterestIncomeOther	92000000	USD
CY2018	us-gaap	Noninterest Income Other NoninterestIncomeOther	97000000	USD
CY2018	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
CY2016	us-gaap	Occupancy Net OccupancyNet	95000000	USD
CY2017	us-gaap	Occupancy Net OccupancyNet	99000000	USD
CY2018	us-gaap	Occupancy Net OccupancyNet	102000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	83000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	13000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	8000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	8000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	10000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	11000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	33000000	USD
CY2017Q4	us-gaap	Other Assets OtherAssets	2262000000	USD
CY2018Q4	us-gaap	Other Assets OtherAssets	2215000000	USD
CY2016	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-3000000	USD
CY2017	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-2000000	USD
CY2018	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	16000000	USD
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	5000000	USD
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	12000000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	0	USD
CY2016	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-4000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-3000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	23000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-3000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-2000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	16000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-1000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-1000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	7000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	7000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	23000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	9000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	7000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	23000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	9000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	12000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	38000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	11000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	5000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	15000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	2000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-15000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	14000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	13000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-23000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	23000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	17000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	-8000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	9000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	4000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-22000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-9000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	4000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-35000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-15000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	6000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	-13000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	-6000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	2000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	9000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	25000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	9000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	25000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	9000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	15000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	5000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	12000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	9000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	15000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	5000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	12000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax	4000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax	3000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	4000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	3000000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-4000000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-3000000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	23000000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-3000000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-2000000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	16000000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-1000000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-1000000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	7000000	USD
CY2016	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	351000000	USD
CY2017	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	393000000	USD
CY2018	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	435000000	USD
CY2016	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	62000000	USD
CY2017	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	154000000	USD
CY2018	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	292000000	USD
CY2016	us-gaap	Other Noninterest Expense OtherNoninterestExpense	435000000	USD
CY2017	us-gaap	Other Noninterest Expense OtherNoninterestExpense	424000000	USD
CY2018	us-gaap	Other Noninterest Expense OtherNoninterestExpense	469000000	USD
CY2016	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	113000000	USD
CY2017	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	361000000	USD
CY2018	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-107000000	USD
CY2016	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale Recognized In Earnings OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSaleRecognizedInEarnings	0	USD
CY2017	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale Recognized In Earnings OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSaleRecognizedInEarnings	0	USD
CY2018	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale Recognized In Earnings OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSaleRecognizedInEarnings	0	USD
CY2016	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	17000000	USD
CY2017	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	16000000	USD
CY2018	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	22000000	USD
CY2016	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Diluted ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted	17000000	USD
CY2017	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Diluted ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted	16000000	USD
CY2018	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Diluted ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted	22000000	USD
CY2016	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	0	USD
CY2017	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	-17000000	USD
CY2018	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	0	USD
CY2016	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	5978000000	USD
CY2017	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	8701000000	USD
CY2018	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	8480000000	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1908000000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2081000000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2065000000	USD
CY2016	us-gaap	Payments For Repurchase Of Preferred Stock And Preference Stock PaymentsForRepurchaseOfPreferredStockAndPreferenceStock	0	USD
CY2017	us-gaap	Payments For Repurchase Of Preferred Stock And Preference Stock PaymentsForRepurchaseOfPreferredStockAndPreferenceStock	575000000	USD
CY2018	us-gaap	Payments For Repurchase Of Preferred Stock And Preference Stock PaymentsForRepurchaseOfPreferredStockAndPreferenceStock	0	USD
CY2016	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	514000000	USD
CY2017	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	527000000	USD
CY2018	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	552000000	USD
CY2016	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	0	USD
CY2017	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	0	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	2554000000	USD
CY2016	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	56000000	USD
CY2017	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	40000000	USD
CY2018	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	82000000	USD
CY2016	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	51000000	USD
CY2017	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	65000000	USD
CY2018	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	65000000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	179000000	USD
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CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	254000000	USD
CY2016	us-gaap	Postage Expense PostageExpense	81000000	USD
CY2017	us-gaap	Postage Expense PostageExpense	78000000	USD
CY2018	us-gaap	Postage Expense PostageExpense	86000000	USD
CY2016	us-gaap	Preferred Stock Dividends Per Share Declared PreferredStockDividendsPerShareDeclared	65
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CY2018	us-gaap	Preferred Stock Dividends Per Share Declared PreferredStockDividendsPerShareDeclared	5500
CY2017Q4	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	570000000	USD
CY2018Q4	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	570000000	USD
CY2017Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
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CY2016	us-gaap	Preferred Stock Redemption Premium PreferredStockRedemptionPremium	0	USD
CY2017	us-gaap	Preferred Stock Redemption Premium PreferredStockRedemptionPremium	15000000	USD
CY2018	us-gaap	Preferred Stock Redemption Premium PreferredStockRedemptionPremium	0	USD
CY2017Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	200000000	shares
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	200000000	shares
CY2017Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	5700	shares
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	5700	shares
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CY2018Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	5700	shares
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CY2018Q4	us-gaap	Preferred Stock Value PreferredStockValue	563000000	USD
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CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	6000000	USD
CY2016	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	0	USD
CY2017	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	563000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	0	USD
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CY2017	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	5059000000	USD
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CY2018	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	2233000000	USD
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CY2017	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	200000000	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	838000000	USD
CY2016	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
CY2016	us-gaap	Professional Fees ProfessionalFees	605000000	USD
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CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	936000000	USD
CY2016	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1859000000	USD
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CY2017Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	674000000	USD
CY2017Q4	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	679000000	USD
CY2017	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	2579000000	USD
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CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	233406005	shares
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	10254000000	USD
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	12319000000	USD
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CY2018Q4	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	800000000	USD
CY2018	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	3035000000	USD
CY2017Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	66000000	USD
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CY2016	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	3419000000	USD
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CY2018	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	4447000000	USD
CY2016	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	0	USD
CY2017	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	404000000	USD
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CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	16687000000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	18906000000	USD
CY2016	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	4000000	USD
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CY2018	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	6000000	USD
CY2016	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	73000000	USD
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CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	82000000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	11275000000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	11323000000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	10892000000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	11130000000	USD
CY2016	us-gaap	Supplies Expense SuppliesExpense	41000000	USD
CY2017	us-gaap	Supplies Expense SuppliesExpense	39000000	USD
CY2018	us-gaap	Supplies Expense SuppliesExpense	29000000	USD
CY2018Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.04
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CY2018Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	2351000000	USD
CY2018Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	1840000000	USD
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CY2018Q4	us-gaap	Time Deposits TimeDeposits	34788000000	USD
CY2017Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	5984000000	USD
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CY2017Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	1400000000	USD
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CY2017Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	23768000000	USD
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CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	205577507	shares
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	123000000	USD
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CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	139000000	USD
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CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	2065000000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	286000000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	158000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	17000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	17000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	25000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	25000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	27000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	15000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	13000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	9000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	5000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	22000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	23000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	6000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	7000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	1000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	9000000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	110000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	105000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	74000000	USD
CY2016	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1000000	shares
CY2017	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2018	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1000000	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	406000000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	374000000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	345000000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	405000000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	374000000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	344000000	shares
CY2018	us-gaap	Advertising Cost Policy Expensed Advertising Cost AdvertisingCostPolicyExpensedAdvertisingCost	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:6px;padding-top:20px;text-align:left;font-size:10pt;"><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;font-style:italic;font-weight:bold;">Advertising Costs</font></div><div style="line-height:120%;padding-bottom:13px;text-align:left;text-indent:36px;font-size:10pt;"><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;">The Company expenses television and radio advertising costs in the period in which the advertising is first aired and all other advertising costs as incurred. Advertising costs are recorded in marketing and business development and were </font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;color:#000000;text-decoration:none;">$258 million</font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;">, </font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;color:#000000;text-decoration:none;">$219 million</font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;"> and </font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;color:#000000;text-decoration:none;">$196 million</font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;"> for the </font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;">years ended December 31, 2018, 2017 and 2016</font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;">, respectively.</font></div></div>
CY2018	us-gaap	Revenue Recognition Interest RevenueRecognitionInterest	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:6px;padding-top:6px;text-align:left;font-size:10pt;"><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;font-style:italic;">Loan Interest and Fee Income</font></div><div style="line-height:120%;padding-bottom:13px;text-align:left;text-indent:36px;font-size:10pt;"><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;">Interest on loans is comprised largely of interest on credit card loans and is recognized based on the amount of loans outstanding and their contractual interest rate. Interest on credit card loans is included in loan receivables when billed to the customer. The Company accrues unbilled interest revenue each month from a customer’s billing cycle date to the end of the month. The Company applies an estimate of the percentage of loans that will revolve in the next cycle in the estimation of the accrued unbilled portion of interest revenue that is included in accrued interest receivable on the consolidated statements of financial condition. Interest on other loan receivables is accrued monthly in accordance with their contractual terms and recorded in accrued interest receivable, which is included in other assets, in the consolidated statements of financial condition. Interest related to PCI loans is discussed in Note 4: Loan Receivables.</font></div><div style="line-height:120%;padding-bottom:13px;text-align:left;text-indent:36px;font-size:10pt;"><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;">The Company recognizes fees (except balance transfer fees and certain product fees) on loan receivables in interest income or loan fee income as the fees are assessed. Balance transfer fees and certain product fees are recognized in interest income or loan fee income ratably over the periods to which they relate. Balance transfer fees are accreted to interest income over the life of the related balance. As of </font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;color:#000000;">December 31, 2018</font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;"> and </font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;">2017</font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;">, deferred revenues related to balance transfer fees, recorded as a reduction of loan receivables, were </font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;color:#000000;font-style:normal;font-weight:normal;text-decoration:none;">$52 million</font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;"> and </font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;color:#000000;font-style:normal;font-weight:normal;text-decoration:none;">$47 million</font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;">, respectively. Loan fee income consists of fees on credit card loans and includes late, cash advance, returned check and other miscellaneous fees and is reflected net of waivers and charge-offs.</font></div><div style="line-height:120%;padding-bottom:13px;text-align:left;text-indent:36px;font-size:10pt;"><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;">Direct loan origination costs on credit card loans are deferred and amortized on a straight-line basis over a </font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;">one year</font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;"> period and recorded in interest income from credit card loans. Direct loan origination costs on other loan receivables are deferred and amortized over the life of the loan using the interest method and are recorded in interest income from other loans. As of </font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;color:#000000;">December 31, 2018</font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;"> and </font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;">2017</font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;">, the remaining unamortized deferred costs related to loan origination were </font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;color:#000000;font-style:normal;font-weight:normal;text-decoration:none;">$138 million</font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;"> and </font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;color:#000000;font-style:normal;font-weight:normal;text-decoration:none;">$125 million</font><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;">, respectively, and were recorded in loan receivables. </font></div><div style="line-height:120%;padding-bottom:13px;text-align:left;text-indent:36px;font-size:10pt;"><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;">The Company accrues interest and fees on loan receivables until the loans are paid or charged off, except in instances of customer bankruptcy, death or fraud, where no further interest and fee accruals occur following notification. Credit card and closed-end consumer loan receivables are placed on non-accrual status upon receipt of notification of the bankruptcy or death of a customer or suspected fraudulent activity on an account. Upon completion of the fraud investigation, non-fraudulent credit card and closed-end consumer loan receivables may resume accruing interest. Payments received on non-accrual loans are allocated according to the same payment hierarchy methodology applied to loans that are accruing interest. When loan receivables are charged off, unpaid accrued interest and fees are reversed against the income line items in which they were originally recorded in the consolidated statements of income. Charge-offs and recoveries of amounts that relate to capitalized interest on student loans are treated as principal charge-offs and recoveries, affecting the provision for loan losses rather than interest income. The Company considers uncollectible interest and fee revenues in assessing the adequacy of the allowance for loan losses. </font></div><div style="line-height:120%;text-indent:36px;font-size:10pt;"><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;">Interest income from loans individually evaluated for impairment, including loans accounted for as troubled debt restructurings, is accounted for in the same manner as other accruing loans. Cash collections on these loans are allocated according to the same payment hierarchy methodology applied to loans that are not in such programs.</font></div></div>
CY2018	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:13px;text-align:left;text-indent:36px;font-size:10pt;"><font style="font-family:Futura LT Medium,sans-serif;font-size:10pt;">The preparation of financial statements in conformity with GAAP requires the Company to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and related disclosures. These estimates are based on information available as of the date of the consolidated financial statements. The Company believes that the estimates used in the preparation of the consolidated financial statements are reasonable. Actual results could differ from these estimates.</font></div></div>

Files In Submission

Name	View Source	Status
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dfs-20181231.xml	Edgar Link	completed
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2017 Q4 Form 10-K Financial Statement

#000139361219000011 Filed on February 20, 2019

Income Statement

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$DFS Discover Financial Services Stock $dfs

2017 Q4 Form 10-K Financial Statement

#000139361219000011 Filed on February 20, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DFS
Discover Financial Services Stock $dfs