$WFC
WELLS FARGO & COMPANY/MN Stock $wfc

$wfc Overview Financials Valuation SEC Filings Company Website

2017 Q4 Form 8-K Financial Statement

#000007297119000225 Filed on February 26, 2019

Income Statement

Concept	2017 Q4	2016 Q4	2016
Revenue			$88.27B
YoY Change			79.12%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$1.612B	$1.372B	$4.970B
YoY Change	17.49%	53.81%	51.16%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense			$5.909B
YoY Change			48.62%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$4.599B	$7.562B	$32.12B
YoY Change	-39.18%	-7.28%	-4.52%
Income Tax	$775.0M	$2.258B	$10.08B
% Of Pretax Income	16.85%	29.86%	31.37%
Net Earnings	$6.151B	$5.274B	$21.94B
YoY Change	16.63%	-5.4%	-4.18%
Net Earnings / Revenue			24.85%
Basic Earnings Per Share			$4.03
Diluted Earnings Per Share	$1.239M	$1.038M	$3.99
COMMON SHARES
Basic Shares Outstanding	4.924B shares	5.022B shares	5.053B shares
Diluted Shares Outstanding			5.108B shares

Balance Sheet

Concept	2017 Q4	2016 Q4	2016
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$215.9B	$221.4B
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$8.847B	$8.333B	$8.333B
YoY Change	6.17%	-4.26%	-4.26%
Goodwill	$26.59B	$26.69B
YoY Change	-0.4%	4.56%
Intangibles
YoY Change
Long-Term Investments	$16.35B	$15.71B	$15.71B
YoY Change	4.1%	15.1%	15.1%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$1952B	$1930B	$1930B
YoY Change	1.12%	7.97%	7.97%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$70.62B	$57.19B	$50.14B
YoY Change	23.48%	-3.8%	-3.91%
Deferred Revenue
YoY Change
Short-Term Debt	$103.3B	$96.78B	$96.78B
YoY Change	6.69%	-0.77%	-0.77%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$70.62B	$57.19B	$50.14B
YoY Change	23.48%	-3.8%	-3.91%
LONG-TERM LIABILITIES
Long-Term Debt	$225.0B	$255.1B	$255.1B
YoY Change	-11.78%	27.84%	27.84%
Other Long-Term Liabilities	$8.796B	$14.49B	$14.49B
YoY Change	-39.3%	4.11%	4.11%
Total Long-Term Liabilities	$233.8B	$269.6B	$269.6B
YoY Change	-13.26%	26.29%	26.29%
TOTAL LIABILITIES
Total Short-Term Liabilities	$70.62B	$57.19B	$50.14B
Total Long-Term Liabilities	$233.8B	$269.6B	$269.6B
Total Liabilities	$1744B	$1730B	$1731B
YoY Change	0.81%	8.53%	8.52%
SHAREHOLDERS EQUITY
Retained Earnings	$145.3B	$133.1B
YoY Change	9.16%	10.1%
Common Stock	$9.136B	$9.136B
YoY Change	0.0%	0.0%
Preferred Stock	$122.0M	$126.0M
YoY Change	-3.17%	14.55%
Treasury Stock (at cost)	$29.89B	$22.71B
YoY Change	31.61%	20.38%
Treasury Stock Shares	590.2M shares	465.7M shares
Shareholders Equity	$206.9B	$199.6B	$199.6B
YoY Change
Total Liabilities & Shareholders Equity	$1952B	$1930B	$1930B
YoY Change	1.12%	7.97%	7.97%

Cashflow Statement

Concept	2017 Q4	2016 Q4	2016
OPERATING ACTIVITIES
Net Income	$6.151B	$5.274B	$21.94B
YoY Change	16.63%	-5.4%	-4.18%
Depreciation, Depletion And Amortization	$1.612B	$1.372B	$4.970B
YoY Change	17.49%	53.81%	51.16%
Cash From Operating Activities	$275.0M	$4.764B	$1.008B
YoY Change	-94.23%	-222.25%	-93.66%
INVESTING ACTIVITIES
Capital Expenditures
YoY Change
Acquisitions			$30.58B
YoY Change			1019366.67%
Other Investing Activities	-$27.94B	-$12.93B	$508.0M
YoY Change	116.04%	-62.84%	-77.15%
Cash From Investing Activities	-$27.94B	-$12.93B	-$141.9B
YoY Change	116.04%	-62.84%	32.34%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$6.701B
YoY Change			-3.87%
Debt Paid & Issued, Net			$34.46B
YoY Change			26.08%
Cash From Financing Activities	18.40B	9.609B	122.8B
YoY Change	91.46%	-76.22%	35.13%
NET CHANGE
Cash From Operating Activities	275.0M	4.764B	1.008B
Cash From Investing Activities	-27.94B	-12.93B	-141.9B
Cash From Financing Activities	18.40B	9.609B	122.8B
Net Change In Cash	-9.264B	1.442B	-$18.12B
YoY Change	-742.44%	-15.97%	-2585.6%
FREE CASH FLOW
Cash From Operating Activities	$275.0M	$4.764B	$1.008B
Capital Expenditures
Free Cash Flow
YoY Change

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2017	dei	Amendment Flag AmendmentFlag	false
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017	dei	Document Type DocumentType	8-K
CY2017	dei	Entity Central Index Key EntityCentralIndexKey	0000072971
CY2017	dei	Entity Registrant Name EntityRegistrantName	WELLS FARGO & COMPANY/MN
CY2017	invest	Investment Warrants Exercise Price InvestmentWarrantsExercisePrice	33.701
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CY2015	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference	1166000000	usd
CY2016	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference	1221000000	usd
CY2017	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference	642000000	usd
CY2017Q4	us-gaap	Class Of Warrant Or Right Outstanding ClassOfWarrantOrRightOutstanding	23327854	shares
CY2016Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	8900000000	usd
CY2017Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	7100000000	usd
CY2017Q4	us-gaap	Common Stock Capital Shares Reserved For Future Issuance CommonStockCapitalSharesReservedForFutureIssuance	560454295	shares
CY2015	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.475
CY2016	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.515
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.540
CY2016Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1.666602371
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1.666602371
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	9000000000	shares
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	9000000000	shares
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	9000000000	shares
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	5481811474	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	5481811474	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	5481811474	shares
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	9136000000	usd
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	9136000000	usd
CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	19673000000	usd
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	18504000000	usd
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	23008000000	usd
CY2015	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	449000000	usd
CY2016	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	90000000	usd
CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	215000000	usd
CY2015	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	20122000000	usd
CY2016	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	18594000000	usd
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	23223000000	usd
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CY2017Q4	us-gaap	Continuing Involvement With Transferred Financial Assets Principal Amount Outstanding ContinuingInvolvementWithTransferredFinancialAssetsPrincipalAmountOutstanding	1227083000000	usd
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CY2017Q4	us-gaap	Cost Method Investments CostMethodInvestments	7163000000	usd
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CY2017Q4	us-gaap	Credit Derivative Maximum Exposure Undiscounted CreditDerivativeMaximumExposureUndiscounted	9021000000	usd
CY2016Q4	us-gaap	Credit Risk Derivative Liabilities At Fair Value CreditRiskDerivativeLiabilitiesAtFairValue	389000000	usd
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CY2016	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	175000000	usd
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	183000000	usd
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CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	8282000000	usd
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CY2016Q4	us-gaap	Federal Funds Sold And Securities Purchased Under Agreements To Resell FederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	58215000000	usd
CY2017Q4	us-gaap	Federal Funds Sold And Securities Purchased Under Agreements To Resell FederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	78999000000	usd
CY2015	us-gaap	Fees And Commissions Credit And Debit Cards FeesAndCommissionsCreditAndDebitCards	3720000000	usd
CY2016	us-gaap	Fees And Commissions Credit And Debit Cards FeesAndCommissionsCreditAndDebitCards	3936000000	usd
CY2017	us-gaap	Fees And Commissions Credit And Debit Cards FeesAndCommissionsCreditAndDebitCards	3960000000	usd
CY2015	us-gaap	Fees And Commissions Fiduciary And Trust Activities FeesAndCommissionsFiduciaryAndTrustActivities	14468000000	usd
CY2016	us-gaap	Fees And Commissions Fiduciary And Trust Activities FeesAndCommissionsFiduciaryAndTrustActivities	14243000000	usd
CY2017	us-gaap	Fees And Commissions Fiduciary And Trust Activities FeesAndCommissionsFiduciaryAndTrustActivities	14495000000	usd
CY2015	us-gaap	Fees And Commissions Other FeesAndCommissionsOther	4324000000	usd
CY2016	us-gaap	Fees And Commissions Other FeesAndCommissionsOther	3727000000	usd
CY2017	us-gaap	Fees And Commissions Other FeesAndCommissionsOther	3557000000	usd
CY2016Q4	us-gaap	Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	82104000000	usd
CY2017Q4	us-gaap	Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	99753000000	usd
CY2016Q4	us-gaap	Financial Instruments Owned And Pledged As Collateral Amount Not Eligible To Be Repledged By Counterparty FinancialInstrumentsOwnedAndPledgedAsCollateralAmountNotEligibleToBeRepledgedByCounterparty	6600000000	usd
CY2017Q4	us-gaap	Financial Instruments Owned And Pledged As Collateral Amount Not Eligible To Be Repledged By Counterparty FinancialInstrumentsOwnedAndPledgedAsCollateralAmountNotEligibleToBeRepledgedByCounterparty	5200000000	usd
CY2012Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	17477000000	usd
CY2013Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	14971000000	usd
CY2014Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	13169000000	usd
CY2015Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	12512000000	usd
CY2016Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	12540000000	usd
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	11960000000	usd
CY2016Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	9945000000	usd
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	10070000000	usd
CY2016Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	2593000000	usd
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	1890000000	usd
CY2016Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	928496000000	usd
CY2017Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	925261000000	usd
CY2016Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	22377000000	usd
CY2017Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	18674000000	usd
CY2015	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	6272000000	usd
CY2016	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	6718000000	usd
CY2017	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	5578000000	usd
CY2015	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	446000000	usd
CY2016	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	424000000	usd
CY2017	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	466000000	usd
CY2016	us-gaap	Financing Receivable Reclassification To Held For Sale FinancingReceivableReclassificationToHeldForSale	312000000	usd
CY2017	us-gaap	Financing Receivable Reclassification To Held For Sale FinancingReceivableReclassificationToHeldForSale	738000000	usd
CY2016	us-gaap	Financing Receivable Significant Purchases FinancingReceivableSignificantPurchases	32715000000	usd
CY2017	us-gaap	Financing Receivable Significant Purchases FinancingReceivableSignificantPurchases	3677000000	usd
CY2016	us-gaap	Financing Receivable Significant Sales FinancingReceivableSignificantSales	2820000000	usd
CY2017	us-gaap	Financing Receivable Significant Sales FinancingReceivableSignificantSales	2491000000	usd
CY2015	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	198000000	usd
CY2016	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	485000000	usd
CY2017	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	262000000	usd
CY2016Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	16242000000	usd
CY2017Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	17670000000	usd
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	1323000000	usd
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	220000000	usd
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	254000000	usd
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	296000000	usd
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	339000000	usd
CY2016Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	20357000000	usd
CY2017Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	20704000000	usd
CY2016Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	4115000000	usd
CY2017Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	3034000000	usd
CY2015	us-gaap	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet	-7000000	usd
CY2016	us-gaap	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet	-13000000	usd
CY2017	us-gaap	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet	-3000000	usd
CY2015	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	75000000	usd
CY2016	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	44000000	usd
CY2017	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	128000000	usd
CY2015	us-gaap	Gain Loss On Sale Of Debt Investments GainLossOnSaleOfDebtInvestments	952000000	usd
CY2016	us-gaap	Gain Loss On Sale Of Debt Investments GainLossOnSaleOfDebtInvestments	942000000	usd
CY2017	us-gaap	Gain Loss On Sale Of Debt Investments GainLossOnSaleOfDebtInvestments	479000000	usd
CY2015	us-gaap	Gain Loss On Securitization Of Financial Assets GainLossOnSecuritizationOfFinancialAssets	506000000	usd
CY2016	us-gaap	Gain Loss On Securitization Of Financial Assets GainLossOnSecuritizationOfFinancialAssets	524000000	usd
CY2017	us-gaap	Gain Loss On Securitization Of Financial Assets GainLossOnSecuritizationOfFinancialAssets	701000000	usd
CY2015Q4	us-gaap	Goodwill Goodwill	25529000000	usd
CY2016Q4	us-gaap	Goodwill Goodwill	26693000000	usd
CY2017Q4	us-gaap	Goodwill Goodwill	26587000000	usd
CY2016	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	1254000000	usd
CY2017	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	24000000	usd
CY2016	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	90000000	usd
CY2017	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	117000000	usd
CY2016Q4	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	71823000000	usd
CY2017Q4	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	76129000000	usd
CY2016Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	99583000000	usd
CY2017Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	139335000000	usd
CY2016Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	599000000	usd
CY2017Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	478000000	usd
CY2016Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	1027000000	usd
CY2017Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	828000000	usd
CY2016Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	2000000	usd
CY2017Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	556000000	usd
CY2016Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	1027000000	usd
CY2017Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	828000000	usd
CY2016Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	52216000000	usd
CY2017Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	72885000000	usd
CY2016Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	1025000000	usd
CY2017Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	272000000	usd
CY2016Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	51317000000	usd
CY2017Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	41468000000	usd
CY2016Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	899000000	usd
CY2017Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	31417000000	usd
CY2016Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	99155000000	usd
CY2017Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	138985000000	usd
CY2015	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	24537000000	usd
CY2016	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	23875000000	usd
CY2017	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	20633000000	usd
CY2015	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	948000000	usd
CY2016	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	898000000	usd
CY2017	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	831000000	usd
CY2015	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	412000000	usd
CY2016	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	353000000	usd
CY2017	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	299000000	usd
CY2016Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	22377000000	usd
CY2017Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	18674000000	usd
CY2016Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	2593000000	usd
CY2017Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	1890000000	usd
CY2016Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	26547000000	usd
CY2017Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	22110000000	usd
CY2016Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	16604000000	usd
CY2017Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	11639000000	usd
CY2016	us-gaap	Income Loss From Affordable Housing Projects Equity Method Investments IncomeLossFromAffordableHousingProjectsEquityMethodInvestments	-816000000	usd
CY2017	us-gaap	Income Loss From Affordable Housing Projects Equity Method Investments IncomeLossFromAffordableHousingProjectsEquityMethodInvestments	-1200000000	usd
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	33641000000	usd
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	32120000000	usd
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	27377000000	usd
CY2015	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	23276000000	usd
CY2016	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	22045000000	usd
CY2017	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	22460000000	usd
CY2016Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	589000000	usd
CY2017Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	726000000	usd
CY2016	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	136000000	usd
CY2017	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	96000000	usd
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10365000000	usd
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10075000000	usd
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4917000000	usd
CY2017	us-gaap	Income Tax Expense Benefit Continuing Operations Adjustment Of Deferred Tax Asset Liability IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability	-3900000000	usd
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	11641000000	usd
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	11204000000	usd
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	9485000000	usd
CY2015	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	25000000	usd
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	81000000	usd
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	1320000000	usd
CY2015	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-577000000	usd
CY2016	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-238000000	usd
CY2017	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-870000000	usd
CY2017	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	173000000	usd
CY2015	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1025000000	usd
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1004000000	usd
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	926000000	usd
CY2015	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	1108000000	usd
CY2016	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	1251000000	usd
CY2017	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	1419000000	usd
CY2015	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	641000000	usd
CY2016	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	725000000	usd
CY2017	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	812000000	usd
CY2015	us-gaap	Income Taxes Paid IncomeTaxesPaid	13688000000	usd
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	8446000000	usd
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	6592000000	usd
CY2015	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	2265000000	usd
CY2016	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-1793000000	usd
CY2017	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-666000000	usd
CY2015	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	54867000000	usd
CY2016	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	82767000000	usd
CY2017	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	29912000000	usd
CY2015	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	354000000	usd
CY2016	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	-2089000000	usd
CY2017	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	5025000000	usd
CY2015	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-1503000000	usd
CY2016	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-211000000	usd
CY2017	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	4837000000	usd
CY2015	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2165000000	usd
CY2016	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	14232000000	usd
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1174000000	usd
CY2016Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	14000000	usd
CY2017Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	14000000	usd
CY2015	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	985000000	usd
CY2016	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	888000000	usd
CY2017	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	891000000	usd
CY2015	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1694000000	usd
CY2016	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1268000000	usd
CY2017	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1049000000	usd
CY2015	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	49277000000	usd
CY2016	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	53663000000	usd
CY2017	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	58909000000	usd
CY2015	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	8937000000	usd
CY2016	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	9248000000	usd
CY2017	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	10664000000	usd
CY2015	us-gaap	Interest And Dividend Income Securities Trading Or Measured At Fair Value InterestAndDividendIncomeSecuritiesTradingOrMeasuredAtFairValue	1971000000	usd
CY2016	us-gaap	Interest And Dividend Income Securities Trading Or Measured At Fair Value InterestAndDividendIncomeSecuritiesTradingOrMeasuredAtFairValue	2506000000	usd
CY2017	us-gaap	Interest And Dividend Income Securities Trading Or Measured At Fair Value InterestAndDividendIncomeSecuritiesTradingOrMeasuredAtFairValue	2928000000	usd
CY2015	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	36575000000	usd
CY2016	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	39505000000	usd
CY2017	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	41388000000	usd
CY2015	us-gaap	Interest And Fee Income Loans Held For Sale Mortgages InterestAndFeeIncomeLoansHeldForSaleMortgages	785000000	usd
CY2016	us-gaap	Interest And Fee Income Loans Held For Sale Mortgages InterestAndFeeIncomeLoansHeldForSaleMortgages	784000000	usd
CY2017	us-gaap	Interest And Fee Income Loans Held For Sale Mortgages InterestAndFeeIncomeLoansHeldForSaleMortgages	786000000	usd
CY2015	us-gaap	Interest And Fee Income Nonmortgage Loans And Leases Held For Sale InterestAndFeeIncomeNonmortgageLoansAndLeasesHeldForSale	19000000	usd
CY2016	us-gaap	Interest And Fee Income Nonmortgage Loans And Leases Held For Sale InterestAndFeeIncomeNonmortgageLoansAndLeasesHeldForSale	9000000	usd
CY2017	us-gaap	Interest And Fee Income Nonmortgage Loans And Leases Held For Sale InterestAndFeeIncomeNonmortgageLoansAndLeasesHeldForSale	12000000	usd
CY2016Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	930112000000	usd
CY2017Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	962269000000	usd
CY2016Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	200671000000	usd
CY2017Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	192580000000	usd
CY2015	us-gaap	Interest Expense InterestExpense	3976000000	usd
CY2016	us-gaap	Interest Expense InterestExpense	5909000000	usd
CY2017	us-gaap	Interest Expense InterestExpense	9352000000	usd
CY2015	us-gaap	Interest Expense Deposits InterestExpenseDeposits	963000000	usd
CY2016	us-gaap	Interest Expense Deposits InterestExpenseDeposits	1395000000	usd
CY2017	us-gaap	Interest Expense Deposits InterestExpenseDeposits	3013000000	usd
CY2015	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	2592000000	usd
CY2016	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	3830000000	usd
CY2017	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	5157000000	usd
CY2015	us-gaap	Interest Expense Other InterestExpenseOther	357000000	usd
CY2016	us-gaap	Interest Expense Other InterestExpenseOther	354000000	usd
CY2017	us-gaap	Interest Expense Other InterestExpenseOther	424000000	usd
CY2015	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	64000000	usd
CY2016	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	330000000	usd
CY2017	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	758000000	usd
CY2015	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	42859000000	usd
CY2016	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	43984000000	usd
CY2017	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	47029000000	usd
CY2015	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	45301000000	usd
CY2016	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	47754000000	usd
CY2017	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	49557000000	usd
CY2015	us-gaap	Interest Paid Net InterestPaidNet	3816000000	usd
CY2016	us-gaap	Interest Paid Net InterestPaidNet	5573000000	usd
CY2017	us-gaap	Interest Paid Net InterestPaidNet	9103000000	usd
CY2016Q4	us-gaap	Interest Receivable InterestReceivable	5339000000	usd
CY2017Q4	us-gaap	Interest Receivable InterestReceivable	5688000000	usd
CY2017	us-gaap	Investment Advisory Fees InvestmentAdvisoryFees	1765000000	usd
CY2017	us-gaap	Investment Advisory Management And Administrative Fees InvestmentAdvisoryManagementAndAdministrativeFees	9358000000	usd
CY2015	us-gaap	Late Fee Income Generated By Servicing Financial Assets Amount LateFeeIncomeGeneratedByServicingFinancialAssetsAmount	198000000	usd
CY2016	us-gaap	Late Fee Income Generated By Servicing Financial Assets Amount LateFeeIncomeGeneratedByServicingFinancialAssetsAmount	180000000	usd
CY2017	us-gaap	Late Fee Income Generated By Servicing Financial Assets Amount LateFeeIncomeGeneratedByServicingFinancialAssetsAmount	172000000	usd
CY2016Q4	us-gaap	Liabilities Liabilities	1729618000000	usd
CY2017Q4	us-gaap	Liabilities Liabilities	1743678000000	usd
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1930115000000	usd
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1951757000000	usd
CY2016Q4	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	19325000000	usd
CY2017Q4	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	19549000000	usd
CY2013Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	14502000000	usd
CY2014Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	12319000000	usd
CY2015Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	11545000000	usd
CY2016Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	11419000000	usd
CY2017Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	11004000000	usd
CY2016Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	4400000000	usd
CY2017Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	3900000000	usd
CY2016Q4	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	403000000	usd
CY2017Q4	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	579000000	usd
CY2013	us-gaap	Loans And Leases Receivable Impaired Interest Income Recognized Change In Present Value Attributable To Passage Of Time LoansAndLeasesReceivableImpairedInterestIncomeRecognizedChangeInPresentValueAttributableToPassageOfTime	264000000	usd
CY2014	us-gaap	Loans And Leases Receivable Impaired Interest Income Recognized Change In Present Value Attributable To Passage Of Time LoansAndLeasesReceivableImpairedInterestIncomeRecognizedChangeInPresentValueAttributableToPassageOfTime	211000000	usd
CY2015	us-gaap	Loans And Leases Receivable Impaired Interest Income Recognized Change In Present Value Attributable To Passage Of Time LoansAndLeasesReceivableImpairedInterestIncomeRecognizedChangeInPresentValueAttributableToPassageOfTime	198000000	usd
CY2016	us-gaap	Loans And Leases Receivable Impaired Interest Income Recognized Change In Present Value Attributable To Passage Of Time LoansAndLeasesReceivableImpairedInterestIncomeRecognizedChangeInPresentValueAttributableToPassageOfTime	205000000	usd
CY2017	us-gaap	Loans And Leases Receivable Impaired Interest Income Recognized Change In Present Value Attributable To Passage Of Time LoansAndLeasesReceivableImpairedInterestIncomeRecognizedChangeInPresentValueAttributableToPassageOfTime	186000000	usd
CY2013Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	822286000000	usd
CY2014Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	862551000000	usd
CY2015Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	916559000000	usd
CY2016Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	967604000000	usd
CY2017Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	956770000000	usd
CY2016Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	956185000000	usd
CY2017Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	945766000000	usd
CY2016Q4	us-gaap	Loans Pledged As Collateral LoansPledgedAsCollateral	516112000000	usd
CY2017Q4	us-gaap	Loans Pledged As Collateral LoansPledgedAsCollateral	469554000000	usd
CY2016Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	758000000	usd
CY2017Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	376000000	usd
CY2016Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group Mortgage LoansReceivableHeldForSaleNetNotPartOfDisposalGroupMortgage	26309000000	usd
CY2017Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group Mortgage LoansReceivableHeldForSaleNetNotPartOfDisposalGroupMortgage	20070000000	usd
CY2016Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group Other LoansReceivableHeldForSaleNetNotPartOfDisposalGroupOther	80000000	usd
CY2017Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group Other LoansReceivableHeldForSaleNetNotPartOfDisposalGroupOther	108000000	usd
CY2016Q4	us-gaap	Long Term Debt LongTermDebt	255077000000	usd
CY2017Q4	us-gaap	Long Term Debt LongTermDebt	225020000000	usd
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	91242000000	usd
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	39826000000	usd
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	18477000000	usd
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	27745000000	usd
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	16343000000	usd
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	31387000000	usd
CY2017	us-gaap	Maximum Length Of Time Hedged In Cash Flow Hedge1 MaximumLengthOfTimeHedgedInCashFlowHedge1	P4Y
CY2016Q4	us-gaap	Minority Interest MinorityInterest	916000000	usd
CY2017Q4	us-gaap	Minority Interest MinorityInterest	1143000000	usd
CY2016Q4	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	22042000000	usd
CY2017Q4	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	16116000000	usd
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	90871000000	usd
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	122791000000	usd
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-10920000000	usd
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-106046000000	usd
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-141857000000	usd
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-13255000000	usd
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	15904000000	usd
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	946000000	usd
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	18722000000	usd
CY2016	us-gaap	Net Credit Loss On Loans Managed Or Securitized Or Assetbacked Financing Arrangement NetCreditLossOnLoansManagedOrSecuritizedOrAssetbackedFinancingArrangement	1290000000	usd
CY2017	us-gaap	Net Credit Loss On Loans Managed Or Securitized Or Assetbacked Financing Arrangement NetCreditLossOnLoansManagedOrSecuritizedOrAssetbackedFinancingArrangement	1762000000	usd
CY2015	us-gaap	Net Income Loss NetIncomeLoss	22894000000	usd
CY2016	us-gaap	Net Income Loss NetIncomeLoss	21938000000	usd
CY2017	us-gaap	Net Income Loss NetIncomeLoss	22183000000	usd
CY2015	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	382000000	usd
CY2016	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	107000000	usd
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	277000000	usd
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	21470000000	usd
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	20373000000	usd
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	20554000000	usd
	us-gaap	New Accounting Pronouncement Or Change In Accounting Principle Effect Of Change On Net Income NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnNetIncome	169000000	usd
CY2016Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	375967000000	usd
CY2017Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	373722000000	usd
CY2015	us-gaap	Noninterest Expense NoninterestExpense	49974000000	usd
CY2016	us-gaap	Noninterest Expense NoninterestExpense	52377000000	usd
CY2017	us-gaap	Noninterest Expense NoninterestExpense	58484000000	usd
CY2015	us-gaap	Noninterest Income NoninterestIncome	40756000000	usd
CY2016	us-gaap	Noninterest Income NoninterestIncome	40513000000	usd
CY2017	us-gaap	Noninterest Income NoninterestIncome	38832000000	usd
CY2017	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3	segment
CY2015	us-gaap	Occupancy Net OccupancyNet	2886000000	usd
CY2016	us-gaap	Occupancy Net OccupancyNet	2855000000	usd
CY2017	us-gaap	Occupancy Net OccupancyNet	2849000000	usd
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	6585000000	usd
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	1172000000	usd
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Future Minimum Sublease Rentals OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals	469000000	usd
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	605000000	usd
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	776000000	usd
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	961000000	usd
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	1095000000	usd
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	1976000000	usd
CY2015	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	621000000	usd
CY2016	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	1927000000	usd
CY2017	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	1907000000	usd
CY2015	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	1300000000	usd
CY2016	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	1300000000	usd
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	1300000000	usd
CY2015	us-gaap	Operating Leases Rent Expense Sublease Rentals1 OperatingLeasesRentExpenseSubleaseRentals1	103000000	usd
CY2016	us-gaap	Operating Leases Rent Expense Sublease Rentals1 OperatingLeasesRentExpenseSubleaseRentals1	86000000	usd
CY2017	us-gaap	Operating Leases Rent Expense Sublease Rentals1 OperatingLeasesRentExpenseSubleaseRentals1	76000000	usd
CY2016Q4	us-gaap	Other Assets OtherAssets	114541000000	usd
CY2017Q4	us-gaap	Other Assets OtherAssets	118381000000	usd
CY2016Q4	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	3275000000	usd
CY2017Q4	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	4867000000	usd
CY2016Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	17469000000	usd
CY2017Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	13540000000	usd
CY2015	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	74000000	usd
CY2016	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	-17000000	usd
CY2017	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	-66000000	usd
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	0	usd
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	0	usd
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	0	usd
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-319000000	usd
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-92000000	usd
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	37000000	usd
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-193000000	usd
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	40000000	usd
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	12000000	usd
CY2015	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToNoncontrollingInterest	0	usd
CY2016	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToNoncontrollingInterest	0	usd
CY2017	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToNoncontrollingInterest	0	usd
CY2015	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	-7000000	usd
CY2016	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	0	usd
CY2017	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	4000000	usd
CY2015	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-149000000	usd
CY2016	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	1000000	usd
CY2017	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	99000000	usd
CY2015	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax	-137000000	usd
CY2016	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax	-3000000	usd
CY2017	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax	96000000	usd
CY2015	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	12000000	usd
CY2016	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	-4000000	usd
CY2017	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	-3000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-4848000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-4698000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	1982000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-3039000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-2929000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1204000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-1809000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-1769000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	778000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-4928000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-5447000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	1197000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	460000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	-852000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	-1083000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	287000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-531000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-675000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	173000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	-321000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	-408000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-142000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-3000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	96000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-154000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	1000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	99000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax	5000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax	0	usd
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax	0	usd
CY2015	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	12000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-4000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-3000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3154000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3451000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	763000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	67000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	-17000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	-62000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-3221000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-3434000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	825000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	398000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-106000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-202000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	248000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-8000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-135000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-512000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-52000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	49000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	150000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-98000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-67000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax	1089000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax	1029000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax	543000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	678000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	641000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	338000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-122000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-153000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-150000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-76000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-96000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-93000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-46000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-57000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-57000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	71000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	100000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	98000000	usd
CY2015	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-1774000000	usd
CY2016	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-1996000000	usd
CY2017	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	434000000	usd
CY2015	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	1549000000	usd
CY2016	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	177000000	usd
CY2017	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	-540000000	usd
CY2015	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	965000000	usd
CY2016	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	110000000	usd
CY2017	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-337000000	usd
CY2015	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-3318000000	usd
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-3458000000	usd
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	2719000000	usd
CY2015	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-2081000000	usd
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-2156000000	usd
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1663000000	usd
CY2015	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-1237000000	usd
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-1302000000	usd
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	1056000000	usd
CY2015	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	990000000	usd
CY2016	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	1611000000	usd
CY2017	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	3131000000	usd
CY2015	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	4446000000	usd
CY2016	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	5094000000	usd
CY2017	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	5566000000	usd
CY2015	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	6496000000	usd
CY2016	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	6086000000	usd
CY2017	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	973000000	usd
CY2015	us-gaap	Other Noninterest Expense OtherNoninterestExpense	12125000000	usd
CY2016	us-gaap	Other Noninterest Expense OtherNoninterestExpense	13115000000	usd
CY2017	us-gaap	Other Noninterest Expense OtherNoninterestExpense	17588000000	usd
CY2016Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	7152000000	usd
CY2017Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	1026000000	usd
CY2015	us-gaap	Other Than Temporary Impairment Losses Investments Heldtomaturity Securities OtherThanTemporaryImpairmentLossesInvestmentsHeldtomaturitySecurities	0	usd
CY2016	us-gaap	Other Than Temporary Impairment Losses Investments Heldtomaturity Securities OtherThanTemporaryImpairmentLossesInvestmentsHeldtomaturitySecurities	0	usd
CY2017	us-gaap	Other Than Temporary Impairment Losses Investments Heldtomaturity Securities OtherThanTemporaryImpairmentLossesInvestmentsHeldtomaturitySecurities	0	usd
CY2015	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	2223000000	usd
CY2016	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	508000000	usd
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	709000000	usd
CY2015	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	8697000000	usd
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	8116000000	usd
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	9908000000	usd
CY2015	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	7400000000	usd
CY2016	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	7472000000	usd
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	7480000000	usd
CY2015	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	1426000000	usd
CY2016	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	1566000000	usd
CY2017	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	1629000000	usd
CY2015	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	679000000	usd
CY2016	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	494000000	usd
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	393000000	usd
CY2015	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	79778000000	usd
CY2016	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	120980000000	usd
CY2017	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	103671000000	usd
CY2015	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	3000000	usd
CY2016	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	30584000000	usd
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	320000000	usd
CY2015	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	25424000000	usd
CY2016	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	23593000000	usd
CY2017	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	usd
CY2015	us-gaap	Payments To Acquire Loans And Leases Held For Investment PaymentsToAcquireLoansAndLeasesHeldForInvestment	13759000000	usd
CY2016	us-gaap	Payments To Acquire Loans And Leases Held For Investment PaymentsToAcquireLoansAndLeasesHeldForInvestment	6221000000	usd
CY2017	us-gaap	Payments To Acquire Loans And Leases Held For Investment PaymentsToAcquireLoansAndLeasesHeldForInvestment	3702000000	usd
CY2016Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Loans Receivable Pledged As Collateral PledgedFinancialInstrumentsNotSeparatelyReportedLoansReceivablePledgedAsCollateral	15800000000	usd
CY2017Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Loans Receivable Pledged As Collateral PledgedFinancialInstrumentsNotSeparatelyReportedLoansReceivablePledgedAsCollateral	2600000000	usd
CY2016Q4	us-gaap	Preferred Stock Discount On Shares PreferredStockDiscountOnShares	1399000000	usd
CY2017Q4	us-gaap	Preferred Stock Discount On Shares PreferredStockDiscountOnShares	1399000000	usd
CY2015	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	1424000000	usd
CY2016	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	1565000000	usd
CY2017	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	1629000000	usd
CY2016Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	11532712	shares
CY2017Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	11677235	shares
CY2016Q4	us-gaap	Preferred Stock Value PreferredStockValue	24551000000	usd
CY2017Q4	us-gaap	Preferred Stock Value PreferredStockValue	25358000000	usd
CY2016Q4	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	24551000000	usd
CY2017Q4	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	25358000000	usd
CY2017	us-gaap	Preferred Stock Voting Rights PreferredStockVotingRights	If issued, preference shares would be limited to one vote per share
CY2015	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1726000000	usd
CY2016	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1415000000	usd
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1211000000	usd
CY2015	us-gaap	Proceeds From Issuance Of Long Term Debt And Capital Securities Net ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet	43030000000	usd
CY2016	us-gaap	Proceeds From Issuance Of Long Term Debt And Capital Securities Net ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet	90111000000	usd
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt And Capital Securities Net ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet	43575000000	usd
CY2015	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	2972000000	usd
CY2016	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	2101000000	usd
CY2017	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	677000000	usd
CY2015	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	33912000000	usd
CY2016	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	41105000000	usd
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	45710000000	usd
CY2015	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	5290000000	usd
CY2016	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	7957000000	usd
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	10673000000	usd
CY2015	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	33000000	usd
CY2016	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-107000000	usd
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-133000000	usd
CY2015	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-232000000	usd
CY2016	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-188000000	usd
CY2017	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	30000000	usd
CY2017	us-gaap	Proceeds From Repayments Of Long Term Debt And Capital Securities ProceedsFromRepaymentsOfLongTermDebtAndCapitalSecurities	30100000000	usd
CY2015	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	34010000000	usd
CY2016	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-1198000000	usd
CY2017	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	14020000000	usd
CY2015	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	25431000000	usd
CY2016	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	31584000000	usd
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	42714000000	usd
CY2015	us-gaap	Proceeds From Sale Of Loans And Leases Held For Investment ProceedsFromSaleOfLoansAndLeasesHeldForInvestment	11672000000	usd
CY2016	us-gaap	Proceeds From Sale Of Loans And Leases Held For Investment ProceedsFromSaleOfLoansAndLeasesHeldForInvestment	10061000000	usd
CY2017	us-gaap	Proceeds From Sale Of Loans And Leases Held For Investment ProceedsFromSaleOfLoansAndLeasesHeldForInvestment	10439000000	usd
CY2015	us-gaap	Professional And Contract Services Expense ProfessionalAndContractServicesExpense	278000000	usd
CY2016	us-gaap	Professional And Contract Services Expense ProfessionalAndContractServicesExpense	1329000000	usd
CY2017	us-gaap	Professional And Contract Services Expense ProfessionalAndContractServicesExpense	1351000000	usd
CY2015	us-gaap	Professional Fees ProfessionalFees	1871000000	usd
CY2016	us-gaap	Professional Fees ProfessionalFees	1608000000	usd
CY2017	us-gaap	Professional Fees ProfessionalFees	5492000000	usd
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	19185000000	usd
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	20147000000	usd
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	8333000000	usd
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	8847000000	usd
CY2016Q4	us-gaap	Property Subject To Or Available For Operating Lease Net PropertySubjectToOrAvailableForOperatingLeaseNet	10089000000	usd
CY2017Q4	us-gaap	Property Subject To Or Available For Operating Lease Net PropertySubjectToOrAvailableForOperatingLeaseNet	9666000000	usd
CY2013	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	2309000000	usd
CY2014	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	1395000000	usd
CY2015	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	2442000000	usd
CY2016	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	3770000000	usd
CY2017	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	2528000000	usd
CY2016Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	3600000000	usd
CY2017Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	3600000000	usd
CY2015	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	27333000000	usd
CY2016	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	34462000000	usd
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	80802000000	usd
CY2015	us-gaap	Restricted Stock Expense RestrictedStockExpense	675000000	usd
CY2016	us-gaap	Restricted Stock Expense RestrictedStockExpense	692000000	usd
CY2017	us-gaap	Restricted Stock Expense RestrictedStockExpense	743000000	usd
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	133075000000	usd
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	145263000000	usd
CY2017	us-gaap	Revenues Revenues	88389000000	usd
CY2015	us-gaap	Salaries Wages And Officers Compensation SalariesWagesAndOfficersCompensation	15883000000	usd
CY2016	us-gaap	Salaries Wages And Officers Compensation SalariesWagesAndOfficersCompensation	16552000000	usd
CY2017	us-gaap	Salaries Wages And Officers Compensation SalariesWagesAndOfficersCompensation	17363000000	usd
CY2016Q4	us-gaap	Secured Borrowings Gross Including Not Subject To Master Netting Arrangement SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement	89111000000	usd
CY2017Q4	us-gaap	Secured Borrowings Gross Including Not Subject To Master Netting Arrangement SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement	111488000000	usd
CY2016Q4	us-gaap	Securities Borrowed Fair Value Of Collateral SecuritiesBorrowedFairValueOfCollateral	102300000000	usd
CY2017Q4	us-gaap	Securities Borrowed Fair Value Of Collateral SecuritiesBorrowedFairValueOfCollateral	130800000000	usd
CY2016Q4	us-gaap	Securities Loaned And Securities Sold Under Agreement To Repurchase Gross Including Not Subject To Master Netting Arrangement SecuritiesLoanedAndSecuritiesSoldUnderAgreementToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	89111000000	usd
CY2017Q4	us-gaap	Securities Loaned And Securities Sold Under Agreement To Repurchase Gross Including Not Subject To Master Netting Arrangement SecuritiesLoanedAndSecuritiesSoldUnderAgreementToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	111488000000	usd
CY2016Q4	us-gaap	Securities Loaned Fair Value Of Collateral SecuritiesLoanedFairValueOfCollateral	91400000000	usd
CY2017Q4	us-gaap	Securities Loaned Fair Value Of Collateral SecuritiesLoanedFairValueOfCollateral	113600000000	usd
CY2016Q4	us-gaap	Securities Loaned Including Not Subject To Master Netting Arrangement And Assets Other Than Securities Transferred SecuritiesLoanedIncludingNotSubjectToMasterNettingArrangementAndAssetsOtherThanSecuritiesTransferred	7007000000	usd
CY2017Q4	us-gaap	Securities Loaned Including Not Subject To Master Netting Arrangement And Assets Other Than Securities Transferred SecuritiesLoanedIncludingNotSubjectToMasterNettingArrangementAndAssetsOtherThanSecuritiesTransferred	11735000000	usd
CY2016Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	1406000000	usd
CY2017Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	1424000000	usd
CY2016Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	12959000000	usd
CY2017Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	13625000000	usd
CY2015	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	214000000	usd
CY2016	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	565000000	usd
CY2017	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	-126000000	usd
CY2015	us-gaap	Servicing Asset At Fair Value Other Changes In Fair Value ServicingAssetAtFairValueOtherChangesInFairValue	-2084000000	usd
CY2016	us-gaap	Servicing Asset At Fair Value Other Changes In Fair Value ServicingAssetAtFairValueOtherChangesInFairValue	-2160000000	usd
CY2017	us-gaap	Servicing Asset At Fair Value Other Changes In Fair Value ServicingAssetAtFairValueOtherChangesInFairValue	-1989000000	usd
CY2015	us-gaap	Servicing Asset At Fair Value Period Increase Decrease ServicingAssetAtFairValuePeriodIncreaseDecrease	-1870000000	usd
CY2016	us-gaap	Servicing Asset At Fair Value Period Increase Decrease ServicingAssetAtFairValuePeriodIncreaseDecrease	-1595000000	usd
CY2017	us-gaap	Servicing Asset At Fair Value Period Increase Decrease ServicingAssetAtFairValuePeriodIncreaseDecrease	-2115000000	usd
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	844000000	usd
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	779000000	usd
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	849000000	usd
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	147000000	shares
CY2015Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	97528000000	usd
CY2016Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	96781000000	usd
CY2017Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	103256000000	usd
CY2015Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0017
CY2016Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0019
CY2017Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0122
CY2015	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	87465000000	usd
CY2016	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	115187000000	usd
CY2017	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	98922000000	usd
CY2017Q4	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Amount Of Unrecorded Benefit SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit	1000000000	usd
CY2017	us-gaap	Stock Granted During Period Value Sharebased Compensation Forfeited StockGrantedDuringPeriodValueSharebasedCompensationForfeited	26000000	usd
CY2015	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	0	usd
CY2016	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	0	usd
CY2017	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	0	usd
CY2015	us-gaap	Stock Issued During Period Value Employee Stock Ownership Plan StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan	0	usd
CY2016	us-gaap	Stock Issued During Period Value Employee Stock Ownership Plan StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan	0	usd
CY2017	us-gaap	Stock Issued During Period Value Employee Stock Ownership Plan StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan	0	usd
CY2015	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	2644000000	usd
CY2016	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	2386000000	usd
CY2017	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	2348000000	usd
CY2015	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	0	usd
CY2016	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	0	usd
CY2017	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	-6000000	usd
CY2015	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	8697000000	usd
CY2016	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	8116000000	usd
CY2017	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	9908000000	usd
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	199581000000	usd
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	206936000000	usd
CY2014Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	185262000000	usd
CY2015Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	193891000000	usd
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	200497000000	usd
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	208079000000	usd
CY2015Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest Adjusted Balance1 StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	194012000000	usd
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest Adjusted Balance1 StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	200284000000	usd
CY2015	us-gaap	Stockholders Equity Period Increase Decrease StockholdersEquityPeriodIncreaseDecrease	8629000000	usd
CY2016	us-gaap	Stockholders Equity Period Increase Decrease StockholdersEquityPeriodIncreaseDecrease	6485000000	usd
CY2017	us-gaap	Stockholders Equity Period Increase Decrease StockholdersEquityPeriodIncreaseDecrease	7795000000	usd
CY2017	us-gaap	Tax Credit Carryforward Expiration Date TaxCreditCarryforwardExpirationDate	2037-12-31
CY2017Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	5515000000	usd
CY2017Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	2138000000	usd
CY2017Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	2864000000	usd
CY2017Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	106089000000	usd
CY2017Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	3556000000	usd
CY2017Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	8432000000	usd
CY2016Q4	us-gaap	Time Deposits TimeDeposits	107900000000	usd
CY2017Q4	us-gaap	Time Deposits TimeDeposits	128600000000	usd
CY2017Q4	us-gaap	Time Deposits TimeDeposits	128594000000	usd
CY2015	us-gaap	Trading Gains Losses TradingGainsLosses	614000000	usd
CY2016	us-gaap	Trading Gains Losses TradingGainsLosses	834000000	usd
CY2017	us-gaap	Trading Gains Losses TradingGainsLosses	1053000000	usd
CY2016Q4	us-gaap	Trading Securities Pledged As Collateral TradingSecuritiesPledgedAsCollateral	84603000000	usd
CY2017Q4	us-gaap	Trading Securities Pledged As Collateral TradingSecuritiesPledgedAsCollateral	109279000000	usd
CY2016	us-gaap	Trading Securities Unrealized Holding Gain Loss TradingSecuritiesUnrealizedHoldingGainLoss	820000000	usd
CY2017	us-gaap	Trading Securities Unrealized Holding Gain Loss TradingSecuritiesUnrealizedHoldingGainLoss	2100000000	usd
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	465702148	shares
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	590194846	shares
CY2016Q4	us-gaap	Treasury Stock Value TreasuryStockValue	22713000000	usd
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	29892000000	usd
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4806000000	usd
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5029000000	usd
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5167000000	usd
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	127000000	usd
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	319000000	usd
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	84000000	usd
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	20000000	usd
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	284000000	usd
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	367000000	usd
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	177000000	usd
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	158000000	usd
CY2016	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	27000000	usd
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	48000000	usd
CY2017Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	3500000000	usd
CY2013	us-gaap	Valuation Allowances And Reserves Recoveries ValuationAllowancesAndReservesRecoveries	1901000000	usd
CY2014	us-gaap	Valuation Allowances And Reserves Recoveries ValuationAllowancesAndReservesRecoveries	1779000000	usd
CY2015	us-gaap	Valuation Allowances And Reserves Recoveries ValuationAllowancesAndReservesRecoveries	1562000000	usd
CY2016	us-gaap	Valuation Allowances And Reserves Recoveries ValuationAllowancesAndReservesRecoveries	1727000000	usd
CY2017	us-gaap	Valuation Allowances And Reserves Recoveries ValuationAllowancesAndReservesRecoveries	1659000000	usd
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	5209800000	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	5108300000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	5017300000	shares
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5136500000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5052800000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	4964600000	shares
CY2016Q4	wfc	Accumulated Other Comprehensive Income Loss Availableforsale Securities Netof Tax Adjusted Balance AccumulatedOtherComprehensiveIncomeLossAvailableforsaleSecuritiesNetofTaxAdjustedBalance	-1099000000	usd
CY2016Q4	wfc	Accumulated Other Comprehensive Income Loss Cumulative Changesin Net Gain Lossfrom Cash Flow Hedges Effect Netof Tax Adjusted Balance AccumulatedOtherComprehensiveIncomeLossCumulativeChangesinNetGainLossfromCashFlowHedgesEffectNetofTaxAdjustedBalance	257000000	usd
CY2016Q4	wfc	Accumulated Other Comprehensive Income Loss Defined Benefit Planafter Tax Adjusted Balance AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlanafterTaxAdjustedBalance	1943000000	usd
CY2016Q4	wfc	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Netof Tax Adjusted Balance AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetofTaxAdjustedBalance	-184000000	usd
CY2016Q4	wfc	Accumulated Other Comprehensive Income Loss Netof Tax Adjusted Balance AccumulatedOtherComprehensiveIncomeLossNetofTaxAdjustedBalance	-2969000000	usd
CY2016	wfc	Affordable Housing Tax Credits Amount AffordableHousingTaxCreditsAmount	939000000	usd
CY2017	wfc	Affordable Housing Tax Credits Amount AffordableHousingTaxCreditsAmount	1100000000	usd
CY2017	wfc	Affordable Housing Tax Credits Commitment Payment Period AffordableHousingTaxCreditsCommitmentPaymentPeriod	P3Y
CY2016Q4	wfc	Aggregate Fair Value Of Derivative Loan Commitments Net Asset Liability AggregateFairValueOfDerivativeLoanCommitmentsNetAssetLiability	-6000000	usd
CY2017Q4	wfc	Aggregate Fair Value Of Derivative Loan Commitments Net Asset Liability AggregateFairValueOfDerivativeLoanCommitmentsNetAssetLiability	17000000	usd
CY2013Q4	wfc	Allowance For Credit Losses As Percentage Of Loans AllowanceForCreditLossesAsPercentageOfLoans	0.0182
CY2014Q4	wfc	Allowance For Credit Losses As Percentage Of Loans AllowanceForCreditLossesAsPercentageOfLoans	0.0153
CY2015Q4	wfc	Allowance For Credit Losses As Percentage Of Loans AllowanceForCreditLossesAsPercentageOfLoans	0.0137
CY2016Q4	wfc	Allowance For Credit Losses As Percentage Of Loans AllowanceForCreditLossesAsPercentageOfLoans	0.0130
CY2017Q4	wfc	Allowance For Credit Losses As Percentage Of Loans AllowanceForCreditLossesAsPercentageOfLoans	0.0125
CY2013Q4	wfc	Allowance For Loan Losses As Percentage Of Loans AllowanceForLoanLossesAsPercentageOfLoans	0.0176
CY2014Q4	wfc	Allowance For Loan Losses As Percentage Of Loans AllowanceForLoanLossesAsPercentageOfLoans	0.0143
CY2015Q4	wfc	Allowance For Loan Losses As Percentage Of Loans AllowanceForLoanLossesAsPercentageOfLoans	0.0126
CY2016Q4	wfc	Allowance For Loan Losses As Percentage Of Loans AllowanceForLoanLossesAsPercentageOfLoans	0.0118
CY2017Q4	wfc	Allowance For Loan Losses As Percentage Of Loans AllowanceForLoanLossesAsPercentageOfLoans	0.0115
CY2013Q4	wfc	Allowance For Unfunded Credit Commitments AllowanceForUnfundedCreditCommitments	469000000	usd
CY2014Q4	wfc	Allowance For Unfunded Credit Commitments AllowanceForUnfundedCreditCommitments	850000000	usd
CY2015Q4	wfc	Allowance For Unfunded Credit Commitments AllowanceForUnfundedCreditCommitments	967000000	usd
CY2016Q4	wfc	Allowance For Unfunded Credit Commitments AllowanceForUnfundedCreditCommitments	1121000000	usd
CY2017Q4	wfc	Allowance For Unfunded Credit Commitments AllowanceForUnfundedCreditCommitments	956000000	usd
CY2015	wfc	Amount Paid To Repurchase Loans From Securitization Vehicles AmountPaidToRepurchaseLoansFromSecuritizationVehicles	11300000000	usd
CY2016	wfc	Amount Paid To Repurchase Loans From Securitization Vehicles AmountPaidToRepurchaseLoansFromSecuritizationVehicles	9900000000	usd
CY2017	wfc	Amount Paid To Repurchase Loans From Securitization Vehicles AmountPaidToRepurchaseLoansFromSecuritizationVehicles	8600000000	usd
CY2015	wfc	Amount Paid To Third Party Investors To Settle Repurchase Liabilities AmountPaidToThirdPartyInvestorsToSettleRepurchaseLiabilities	19000000	usd
CY2016	wfc	Amount Paid To Third Party Investors To Settle Repurchase Liabilities AmountPaidToThirdPartyInvestorsToSettleRepurchaseLiabilities	11000000	usd
CY2017	wfc	Amount Paid To Third Party Investors To Settle Repurchase Liabilities AmountPaidToThirdPartyInvestorsToSettleRepurchaseLiabilities	0	usd
CY2017Q4	wfc	Amountof Undistributed Earningsof Foreign Subsidiaries AmountofUndistributedEarningsofForeignSubsidiaries	4000000000	usd
CY2017	wfc	Annual Sales Of Small Business Community Banking Customers AnnualSalesOfSmallBusinessCommunityBankingCustomers	5000000	usd
CY2017	wfc	Annual Sales Of Wholesale Banking Customers AnnualSalesOfWholesaleBankingCustomers	5000000	usd
CY2016	wfc	Average Cash Reserve Deposit Required And Made Federal Reserve Banks AverageCashReserveDepositRequiredAndMadeFederalReserveBanks	10747000000	usd
CY2017	wfc	Average Cash Reserve Deposit Required And Made Federal Reserve Banks AverageCashReserveDepositRequiredAndMadeFederalReserveBanks	12306000000	usd
CY2017Q4	wfc	Capital Conservation Buffer CapitalConservationBuffer	0.0125
CY2016Q4	wfc	Carrying Value Of Delinquent Loans Eligible For Repurchase CarryingValueOfDelinquentLoansEligibleForRepurchase	1200000000	usd
CY2017Q4	wfc	Carrying Value Of Delinquent Loans Eligible For Repurchase CarryingValueOfDelinquentLoansEligibleForRepurchase	2200000000	usd
	wfc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion Into Interest Income CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretionIntoInterestIncome	12783000000	usd
CY2015	wfc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion Into Interest Income CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretionIntoInterestIncome	1429000000	usd
CY2016	wfc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion Into Interest Income CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretionIntoInterestIncome	1365000000	usd
CY2017	wfc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion Into Interest Income CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretionIntoInterestIncome	1406000000	usd
	wfc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion Into Noninterest Income Due To Sales CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretionIntoNoninterestIncomeDueToSales	430000000	usd
CY2015	wfc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion Into Noninterest Income Due To Sales CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretionIntoNoninterestIncomeDueToSales	28000000	usd
CY2016	wfc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion Into Noninterest Income Due To Sales CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretionIntoNoninterestIncomeDueToSales	9000000	usd
CY2017	wfc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion Into Noninterest Income Due To Sales CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretionIntoNoninterestIncomeDueToSales	334000000	usd
	wfc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Addition Due To Acquisitions CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditionDueToAcquisitions	132000000	usd
CY2015	wfc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Addition Due To Acquisitions CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditionDueToAcquisitions	0	usd
CY2016	wfc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Addition Due To Acquisitions CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditionDueToAcquisitions	27000000	usd
CY2017	wfc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Addition Due To Acquisitions CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditionDueToAcquisitions	2000000	usd
	wfc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Changes In Expected Cash Flows That Do Not Affect Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesChangesInExpectedCashFlowsThatDoNotAffectNonaccretableDifference	11856000000	usd
CY2015	wfc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Changes In Expected Cash Flows That Do Not Affect Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesChangesInExpectedCashFlowsThatDoNotAffectNonaccretableDifference	-1198000000	usd
CY2016	wfc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Changes In Expected Cash Flows That Do Not Affect Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesChangesInExpectedCashFlowsThatDoNotAffectNonaccretableDifference	-4959000000	usd
CY2017	wfc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Changes In Expected Cash Flows That Do Not Affect Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesChangesInExpectedCashFlowsThatDoNotAffectNonaccretableDifference	-1233000000	usd
CY2015	wfc	Commission And Incentive Compensation CommissionAndIncentiveCompensation	10352000000	usd
CY2016	wfc	Commission And Incentive Compensation CommissionAndIncentiveCompensation	10247000000	usd
CY2017	wfc	Commission And Incentive Compensation CommissionAndIncentiveCompensation	10442000000	usd
CY2017Q4	wfc	Commonstockcapitalsharesnotreserved Commonstockcapitalsharesnotreserved	2957734231	shares
CY2015	wfc	Cost And Equity Method Other Than Temporary Impairment CostAndEquityMethodOtherThanTemporaryImpairment	374000000	usd
CY2016	wfc	Cost And Equity Method Other Than Temporary Impairment CostAndEquityMethodOtherThanTemporaryImpairment	448000000	usd
CY2017	wfc	Cost And Equity Method Other Than Temporary Impairment CostAndEquityMethodOtherThanTemporaryImpairment	339000000	usd
CY2017Q4	wfc	Credit And Non Credit Transactions With All Nonbank Affiliates Maximum Percent Of Bank Capital And Surplus CreditAndNonCreditTransactionsWithAllNonbankAffiliatesMaximumPercentOfBankCapitalAndSurplus	0.2
CY2016Q4	wfc	Credit Derivative Notional Amount Net Protection Sold And Purchased CreditDerivativeNotionalAmountNetProtectionSoldAndPurchased	6365000000	usd
CY2017Q4	wfc	Credit Derivative Notional Amount Net Protection Sold And Purchased CreditDerivativeNotionalAmountNetProtectionSoldAndPurchased	6463000000	usd
CY2016Q4	wfc	Credit Derivative Notional Amount Purchased Credit Protection Other CreditDerivativeNotionalAmountPurchasedCreditProtectionOther	16328000000	usd
CY2017Q4	wfc	Credit Derivative Notional Amount Purchased Credit Protection Other CreditDerivativeNotionalAmountPurchasedCreditProtectionOther	14959000000	usd
CY2016Q4	wfc	Credit Derivatives Notional Amount Purchased Credit Protection CreditDerivativesNotionalAmountPurchasedCreditProtection	4118000000	usd
CY2017Q4	wfc	Credit Derivatives Notional Amount Purchased Credit Protection CreditDerivativesNotionalAmountPurchasedCreditProtection	2558000000	usd
CY2016Q4	wfc	Deb Securities Af Sand Htm Gross Unrealized Gain2 DebSecuritiesAFSandHTMGrossUnrealizedGain2	4217000000	usd
CY2017Q4	wfc	Deb Securities Af Sand Htm Gross Unrealized Gain2 DebSecuritiesAFSandHTMGrossUnrealizedGain2	3823000000	usd
CY2016Q4	wfc	Debt Securities Af Sand Htm Amortized Cost Basis DebtSecuritiesAFSandHTMAmortizedCostBasis	409736000000	usd
CY2017Q4	wfc	Debt Securities Af Sand Htm Amortized Cost Basis DebtSecuritiesAFSandHTMAmortizedCostBasis	414963000000	usd
CY2016Q4	wfc	Debt Securities Af Sand Htm Continuous Unrealized Loss Position12 Monthsor Longer Aggregate Loss2 DebtSecuritiesAFSandHTMContinuousUnrealizedLossPosition12MonthsorLongerAggregateLoss2	1549000000	usd
CY2017Q4	wfc	Debt Securities Af Sand Htm Continuous Unrealized Loss Position12 Monthsor Longer Aggregate Loss2 DebtSecuritiesAFSandHTMContinuousUnrealizedLossPosition12MonthsorLongerAggregateLoss2	2140000000	usd
CY2016Q4	wfc	Debt Securities Af Sand Htm Continuous Unrealized Loss Position Aggregate Loss2 DebtSecuritiesAFSandHTMContinuousUnrealizedLossPositionAggregateLoss2	6434000000	usd
CY2017Q4	wfc	Debt Securities Af Sand Htm Continuous Unrealized Loss Position Aggregate Loss2 DebtSecuritiesAFSandHTMContinuousUnrealizedLossPositionAggregateLoss2	2716000000	usd
CY2016Q4	wfc	Debt Securities Af Sand Htm Continuous Unrealized Loss Position Fair Value DebtSecuritiesAFSandHTMContinuousUnrealizedLossPositionFairValue	234384000000	usd
CY2017Q4	wfc	Debt Securities Af Sand Htm Continuous Unrealized Loss Position Fair Value DebtSecuritiesAFSandHTMContinuousUnrealizedLossPositionFairValue	196667000000	usd
CY2016Q4	wfc	Debt Securities Af Sand Htm Continuous Unrealized Loss Position Lessthan12 Months Aggregate Loss2 DebtSecuritiesAFSandHTMContinuousUnrealizedLossPositionLessthan12MonthsAggregateLoss2	4885000000	usd
CY2017Q4	wfc	Debt Securities Af Sand Htm Continuous Unrealized Loss Position Lessthan12 Months Aggregate Loss2 DebtSecuritiesAFSandHTMContinuousUnrealizedLossPositionLessthan12MonthsAggregateLoss2	576000000	usd
CY2016Q4	wfc	Debt Securities Af Sand Htm Continuous Unrealized Loss Position Lessthan Twelve Months Fair Value DebtSecuritiesAFSandHTMContinuousUnrealizedLossPositionLessthanTwelveMonthsFairValue	206123000000	usd
CY2017Q4	wfc	Debt Securities Af Sand Htm Continuous Unrealized Loss Position Lessthan Twelve Months Fair Value DebtSecuritiesAFSandHTMContinuousUnrealizedLossPositionLessthanTwelveMonthsFairValue	105183000000	usd
CY2016Q4	wfc	Debt Securities Af Sand Htm Continuous Unrealized Loss Position Twelve Monthsor Longer Fair Value DebtSecuritiesAFSandHTMContinuousUnrealizedLossPositionTwelveMonthsorLongerFairValue	28261000000	usd
CY2017Q4	wfc	Debt Securities Af Sand Htm Continuous Unrealized Loss Position Twelve Monthsor Longer Fair Value DebtSecuritiesAFSandHTMContinuousUnrealizedLossPositionTwelveMonthsorLongerFairValue	91484000000	usd
CY2016Q4	wfc	Debt Securities Af Sand Htm Gross Unrealized Losses2 DebtSecuritiesAFSandHTMGrossUnrealizedLosses2	6434000000	usd
CY2017Q4	wfc	Debt Securities Af Sand Htm Gross Unrealized Losses2 DebtSecuritiesAFSandHTMGrossUnrealizedLosses2	2716000000	usd
CY2016Q4	wfc	Debt Securitiesandothers Pledgedas Collateral DebtSecuritiesandothersPledgedasCollateral	90946000000	usd
CY2017Q4	wfc	Debt Securitiesandothers Pledgedas Collateral DebtSecuritiesandothersPledgedasCollateral	73467000000	usd
CY2016Q4	wfc	Deferred Tax Assets Tax Deferred Adjustments Related To Certain Loans Acquired In Transfer Not Accounted For As Debt Securities DeferredTaxAssetsTaxDeferredAdjustmentsRelatedToCertainLoansAcquiredInTransferNotAccountedForAsDebtSecurities	1762000000	usd
CY2017Q4	wfc	Deferred Tax Assets Tax Deferred Adjustments Related To Certain Loans Acquired In Transfer Not Accounted For As Debt Securities DeferredTaxAssetsTaxDeferredAdjustmentsRelatedToCertainLoansAcquiredInTransferNotAccountedForAsDebtSecurities	1057000000	usd
CY2016Q4	wfc	Deferred Tax Assets Tax Deferred Adjustments Related To Net Operating Loss And Tax Credit Carry Forwards DeferredTaxAssetsTaxDeferredAdjustmentsRelatedToNetOperatingLossAndTaxCreditCarryForwards	391000000	usd
CY2017Q4	wfc	Deferred Tax Assets Tax Deferred Adjustments Related To Net Operating Loss And Tax Credit Carry Forwards DeferredTaxAssetsTaxDeferredAdjustmentsRelatedToNetOperatingLossAndTaxCreditCarryForwards	341000000	usd
CY2016Q4	wfc	Deferred Tax Liabilities Insurance Reserves DeferredTaxLiabilitiesInsuranceReserves	1588000000	usd
CY2017Q4	wfc	Deferred Tax Liabilities Insurance Reserves DeferredTaxLiabilitiesInsuranceReserves	750000000	usd
CY2016Q4	wfc	Deferred Tax Liabilities Tax Deferred Adjustments Related To Mark To Market Adjustments On Available For Sale Securities DeferredTaxLiabilitiesTaxDeferredAdjustmentsRelatedToMarkToMarketAdjustmentsOnAvailableForSaleSecurities	5511000000	usd
CY2017Q4	wfc	Deferred Tax Liabilities Tax Deferred Adjustments Related To Mark To Market Adjustments On Available For Sale Securities DeferredTaxLiabilitiesTaxDeferredAdjustmentsRelatedToMarkToMarketAdjustmentsOnAvailableForSaleSecurities	5816000000	usd
CY2017	wfc	Defined Benefit Plan Health Care Cost Trend Rate Assumed For Next Fiscal Year Periodic Benefit Cost DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYearPeriodicBenefitCost	0.0890
CY2017Q4	wfc	Defined Benefit Plan Health Care Cost Trend Rate Assumed For Next Fiscal Year Postretirement Projected Benefit Obligation DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYearPostretirementProjectedBenefitObligation	0.0900
CY2017	wfc	Defined Benefit Plan Ultimate Health Care Cost Trend Rate Periodic Benefit Cost DefinedBenefitPlanUltimateHealthCareCostTrendRatePeriodicBenefitCost	0.0450
CY2017Q4	wfc	Defined Benefit Plan Ultimate Health Care Cost Trend Rate Projected Benefit Obligation DefinedBenefitPlanUltimateHealthCareCostTrendRateProjectedBenefitObligation	0.0450
CY2017	wfc	Defined Benefit Plan Year That Rate Reaches Ultimate Trend Rate Periodic Benefit Cost DefinedBenefitPlanYearThatRateReachesUltimateTrendRatePeriodicBenefitCost	2026
CY2017	wfc	Defined Benefit Plan Year That Rate Reaches Ultimate Trend Rate Projected Benefit Obligation DefinedBenefitPlanYearThatRateReachesUltimateTrendRateProjectedBenefitObligation	2026
CY2016Q4	wfc	Delinquent Amountat Endof Periodon Loansand Foreclosed Assets Managedand Securitizedor Assetbacked Financing Arrangement DelinquentAmountatEndofPeriodonLoansandForeclosedAssetsManagedandSecuritizedorAssetbackedFinancingArrangement	19778000000	usd
CY2017Q4	wfc	Delinquent Amountat Endof Periodon Loansand Foreclosed Assets Managedand Securitizedor Assetbacked Financing Arrangement DelinquentAmountatEndofPeriodonLoansandForeclosedAssetsManagedandSecuritizedorAssetbackedFinancingArrangement	16232000000	usd
CY2016Q4	wfc	Derivative Asset Amount Offset Against Collateral DerivativeAssetAmountOffsetAgainstCollateral	70631000000	usd
CY2017Q4	wfc	Derivative Asset Amount Offset Against Collateral DerivativeAssetAmountOffsetAgainstCollateral	24127000000	usd
CY2016Q4	wfc	Derivative Asset Fair Value Amount Offset Against Collateral Subject To Master Netting Arrangements DerivativeAssetFairValueAmountOffsetAgainstCollateralSubjectToMasterNettingArrangements	74400000000	usd
CY2017Q4	wfc	Derivative Asset Fair Value Amount Offset Against Collateral Subject To Master Netting Arrangements DerivativeAssetFairValueAmountOffsetAgainstCollateralSubjectToMasterNettingArrangements	30000000000	usd
CY2016Q4	wfc	Derivative Asset Net Exposure DerivativeAssetNetExposure	12753000000	usd
CY2017Q4	wfc	Derivative Asset Net Exposure DerivativeAssetNetExposure	11455000000	usd
CY2016Q4	wfc	Derivative Asset Not Subject To Enforceable Master Netting Arrangement DerivativeAssetNotSubjectToEnforceableMasterNettingArrangement	10700000000	usd
CY2017Q4	wfc	Derivative Asset Not Subject To Enforceable Master Netting Arrangement DerivativeAssetNotSubjectToEnforceableMasterNettingArrangement	6400000000	usd
CY2016Q4	wfc	Derivative Liability Amount Offset Against Collateral DerivativeLiabilityAmountOffsetAgainstCollateral	72696000000	usd
CY2017Q4	wfc	Derivative Liability Amount Offset Against Collateral DerivativeLiabilityAmountOffsetAgainstCollateral	25502000000	usd
CY2016Q4	wfc	Derivative Liability Fair Value Amount Offset Against Collateral Subject To Master Netting Arrangements DerivativeLiabilityFairValueAmountOffsetAgainstCollateralSubjectToMasterNettingArrangements	78400000000	usd
CY2017Q4	wfc	Derivative Liability Fair Value Amount Offset Against Collateral Subject To Master Netting Arrangements DerivativeLiabilityFairValueAmountOffsetAgainstCollateralSubjectToMasterNettingArrangements	29900000000	usd
CY2016Q4	wfc	Derivative Liability Net Exposure DerivativeLiabilityNetExposure	10698000000	usd
CY2017Q4	wfc	Derivative Liability Net Exposure DerivativeLiabilityNetExposure	7104000000	usd
CY2016Q4	wfc	Derivative Liability Not Subject To Enforceable Master Netting Arrangement DerivativeLiabilityNotSubjectToEnforceableMasterNettingArrangement	8700000000	usd
CY2017Q4	wfc	Derivative Liability Not Subject To Enforceable Master Netting Arrangement DerivativeLiabilityNotSubjectToEnforceableMasterNettingArrangement	4400000000	usd
CY2015	wfc	Effective Income Tax Rate Reconciliation Tax Reform Act Amount EffectiveIncomeTaxRateReconciliationTaxReformActAmount	0	usd
CY2016	wfc	Effective Income Tax Rate Reconciliation Tax Reform Act Amount EffectiveIncomeTaxRateReconciliationTaxReformActAmount	0	usd
CY2017	wfc	Effective Income Tax Rate Reconciliation Tax Reform Act Amount EffectiveIncomeTaxRateReconciliationTaxReformActAmount	-3713000000	usd
CY2015	wfc	Effective Income Tax Rate Reconciliation Tax Reform Act Percentage EffectiveIncomeTaxRateReconciliationTaxReformActPercentage	0.000
CY2016	wfc	Effective Income Tax Rate Reconciliation Tax Reform Act Percentage EffectiveIncomeTaxRateReconciliationTaxReformActPercentage	0.000
CY2017	wfc	Effective Income Tax Rate Reconciliation Tax Reform Act Percentage EffectiveIncomeTaxRateReconciliationTaxReformActPercentage	-0.137
CY2016Q4	wfc	Employee Stock Ownership Plan Preferred Stock Carrying Value EmployeeStockOwnershipPlanPreferredStockCarryingValue	1439000000	usd
CY2017Q4	wfc	Employee Stock Ownership Plan Preferred Stock Carrying Value EmployeeStockOwnershipPlanPreferredStockCarryingValue	1556000000	usd
CY2016Q4	wfc	Employee Stock Ownership Plan Preferred Stock Discount On Shares EmployeeStockOwnershipPlanPreferredStockDiscountOnShares	0	usd
CY2017Q4	wfc	Employee Stock Ownership Plan Preferred Stock Discount On Shares EmployeeStockOwnershipPlanPreferredStockDiscountOnShares	0	usd
CY2016Q4	wfc	Employee Stock Ownership Plan Preferred Stock Liquidation Preference EmployeeStockOwnershipPlanPreferredStockLiquidationPreference	0
CY2017Q4	wfc	Employee Stock Ownership Plan Preferred Stock Liquidation Preference EmployeeStockOwnershipPlanPreferredStockLiquidationPreference	0
CY2016Q4	wfc	Employee Stock Ownership Plan Preferred Stock Liquidation Preference Value EmployeeStockOwnershipPlanPreferredStockLiquidationPreferenceValue	1439000000	usd
CY2017Q4	wfc	Employee Stock Ownership Plan Preferred Stock Liquidation Preference Value EmployeeStockOwnershipPlanPreferredStockLiquidationPreferenceValue	1556000000	usd
CY2016Q4	wfc	Employee Stock Ownership Plan Preferred Stock Shares Authorized And Designated EmployeeStockOwnershipPlanPreferredStockSharesAuthorizedAndDesignated	1439181	shares
CY2017Q4	wfc	Employee Stock Ownership Plan Preferred Stock Shares Authorized And Designated EmployeeStockOwnershipPlanPreferredStockSharesAuthorizedAndDesignated	1556104	shares
CY2015	wfc	Fair Value Level Transfer Amount Total FairValueLevelTransferAmountTotal	0	usd
CY2016	wfc	Fair Value Level Transfer Amount Total FairValueLevelTransferAmountTotal	0	usd
CY2017	wfc	Fair Value Level Transfer Amount Total FairValueLevelTransferAmountTotal	0	usd
CY2016Q4	wfc	Fair Value Of Net Asset Liability From Economic Hedges Related To Mortgage Servicing Activities FairValueOfNetAssetLiabilityFromEconomicHedgesRelatedToMortgageServicingActivities	-617000000	usd
CY2017Q4	wfc	Fair Value Of Net Asset Liability From Economic Hedges Related To Mortgage Servicing Activities FairValueOfNetAssetLiabilityFromEconomicHedgesRelatedToMortgageServicingActivities	89000000	usd
CY2016Q4	wfc	Federal Funds Sold Securities Purchased Under Resale Agreements And Other Short Term Investments FederalFundsSoldSecuritiesPurchasedUnderResaleAgreementsAndOtherShortTermInvestments	266038000000	usd
CY2017Q4	wfc	Federal Funds Sold Securities Purchased Under Resale Agreements And Other Short Term Investments FederalFundsSoldSecuritiesPurchasedUnderResaleAgreementsAndOtherShortTermInvestments	272605000000	usd
CY2016Q4	wfc	Federal Funds Sold Securities Purchased Under Resale Agreements Other Short Term Investments FederalFundsSoldSecuritiesPurchasedUnderResaleAgreementsOtherShortTermInvestments	65367000000	usd
CY2017Q4	wfc	Federal Funds Sold Securities Purchased Under Resale Agreements Other Short Term Investments FederalFundsSoldSecuritiesPurchasedUnderResaleAgreementsOtherShortTermInvestments	80025000000	usd
CY2015	wfc	Fees And Commission Mortgage Banking FeesAndCommissionMortgageBanking	6501000000	usd
CY2016	wfc	Fees And Commission Mortgage Banking FeesAndCommissionMortgageBanking	6096000000	usd
CY2017	wfc	Fees And Commission Mortgage Banking FeesAndCommissionMortgageBanking	4350000000	usd
CY2015	wfc	Fees And Commissions Depositors Accounts FeesAndCommissionsDepositorsAccounts	5168000000	usd
CY2016	wfc	Fees And Commissions Depositors Accounts FeesAndCommissionsDepositorsAccounts	5372000000	usd
CY2017	wfc	Fees And Commissions Depositors Accounts FeesAndCommissionsDepositorsAccounts	5111000000	usd
CY2016Q4	wfc	Financial Instruments Owned And Pledged As Collateral Carrying Amount FinancialInstrumentsOwnedAndPledgedAsCollateralCarryingAmount	691661000000	usd
CY2017Q4	wfc	Financial Instruments Owned And Pledged As Collateral Carrying Amount FinancialInstrumentsOwnedAndPledgedAsCollateralCarryingAmount	652300000000	usd
CY2013	wfc	Financing Receivable Allowance For Credit Losses Other Increase Decrease FinancingReceivableAllowanceForCreditLossesOtherIncreaseDecrease	-42000000	usd
CY2014	wfc	Financing Receivable Allowance For Credit Losses Other Increase Decrease FinancingReceivableAllowanceForCreditLossesOtherIncreaseDecrease	-41000000	usd
CY2015	wfc	Financing Receivable Allowance For Credit Losses Other Increase Decrease FinancingReceivableAllowanceForCreditLossesOtherIncreaseDecrease	-9000000	usd
CY2016	wfc	Financing Receivable Allowance For Credit Losses Other Increase Decrease FinancingReceivableAllowanceForCreditLossesOtherIncreaseDecrease	-17000000	usd
CY2017	wfc	Financing Receivable Allowance For Credit Losses Other Increase Decrease FinancingReceivableAllowanceForCreditLossesOtherIncreaseDecrease	6000000	usd
CY2016Q4	wfc	Financing Receivable Temporary Advance Arrangements FinancingReceivableTemporaryAdvanceArrangements	77000000000	usd
CY2017Q4	wfc	Financing Receivable Temporary Advance Arrangements FinancingReceivableTemporaryAdvanceArrangements	85000000000	usd
CY2017	wfc	Futureadjustmentof Other Comprehensive Income Losstaxexpensebenefit FutureadjustmentofOtherComprehensiveIncomeLosstaxexpensebenefit	400000000	usd
CY2017Q4	wfc	Gsib Surcharge GSIBSurcharge	0.01
CY2015	wfc	Gain Loss On Available For Sale And Held To Maturity Investments GainLossOnAvailableForSaleAndHeldToMaturityInvestments	3182000000	usd
CY2016	wfc	Gain Loss On Available For Sale And Held To Maturity Investments GainLossOnAvailableForSaleAndHeldToMaturityInvestments	1821000000	usd
CY2017	wfc	Gain Loss On Available For Sale And Held To Maturity Investments GainLossOnAvailableForSaleAndHeldToMaturityInvestments	1747000000	usd
CY2015	wfc	Gain Loss On Mortgage Loan Origination And Sales Activities GainLossOnMortgageLoanOriginationAndSalesActivities	4060000000	usd
CY2016	wfc	Gain Loss On Mortgage Loan Origination And Sales Activities GainLossOnMortgageLoanOriginationAndSalesActivities	4331000000	usd
CY2017	wfc	Gain Loss On Mortgage Loan Origination And Sales Activities GainLossOnMortgageLoanOriginationAndSalesActivities	2923000000	usd
CY2015	wfc	Goodwillreclassforheldforsale Goodwillreclassforheldforsale	0	usd
CY2016	wfc	Goodwillreclassforheldforsale Goodwillreclassforheldforsale	0	usd
CY2017	wfc	Goodwillreclassforheldforsale Goodwillreclassforheldforsale	-13000000	usd
CY2016Q4	wfc	Guarantor Obligations Current Carrying Value1 GuarantorObligationsCurrentCarryingValue1	136000000	usd
CY2017Q4	wfc	Guarantor Obligations Current Carrying Value1 GuarantorObligationsCurrentCarryingValue1	-364000000	usd
CY2016Q4	wfc	Guarantor Obligations Maximum Exposure Expires After Five Years GuarantorObligationsMaximumExposureExpiresAfterFiveYears	15212000000	usd
CY2017Q4	wfc	Guarantor Obligations Maximum Exposure Expires After Five Years GuarantorObligationsMaximumExposureExpiresAfterFiveYears	16052000000	usd
CY2016Q4	wfc	Guarantor Obligations Maximum Exposure Expires In One Year Or Less GuarantorObligationsMaximumExposureExpiresInOneYearOrLess	27689000000	usd
CY2017Q4	wfc	Guarantor Obligations Maximum Exposure Expires In One Year Or Less GuarantorObligationsMaximumExposureExpiresInOneYearOrLess	31034000000	usd
CY2016Q4	wfc	Guarantor Obligations Maximum Exposure Expires In One Year Through Three Years GuarantorObligationsMaximumExposureExpiresInOneYearThroughThreeYears	20190000000	usd
CY2017Q4	wfc	Guarantor Obligations Maximum Exposure Expires In One Year Through Three Years GuarantorObligationsMaximumExposureExpiresInOneYearThroughThreeYears	21147000000	usd
CY2016Q4	wfc	Guarantor Obligations Maximum Exposure Expires In Three Years Through Five Years GuarantorObligationsMaximumExposureExpiresInThreeYearsThroughFiveYears	8732000000	usd
CY2017Q4	wfc	Guarantor Obligations Maximum Exposure Expires In Three Years Through Five Years GuarantorObligationsMaximumExposureExpiresInThreeYearsThroughFiveYears	7896000000	usd
CY2017Q4	wfc	High Value Properties Threshold HighValuePropertiesThreshold	1000000	usd
CY2015	wfc	Impaired Financing Receivable Interest Income ImpairedFinancingReceivableInterestIncome	1360000000	usd
CY2016	wfc	Impaired Financing Receivable Interest Income ImpairedFinancingReceivableInterestIncome	1251000000	usd
CY2017	wfc	Impaired Financing Receivable Interest Income ImpairedFinancingReceivableInterestIncome	1130000000	usd
CY2015	wfc	Income Expense From All Other Nonmarketable Equity Investments IncomeExpenseFromAllOtherNonmarketableEquityInvestments	-743000000	usd
CY2016	wfc	Income Expense From All Other Nonmarketable Equity Investments IncomeExpenseFromAllOtherNonmarketableEquityInvestments	-508000000	usd
CY2017	wfc	Income Expense From All Other Nonmarketable Equity Investments IncomeExpenseFromAllOtherNonmarketableEquityInvestments	-1042000000	usd
CY2016	wfc	Increase Decrease In Fair Value Assets Measured On Nonrecurring Basis IncreaseDecreaseInFairValueAssetsMeasuredOnNonrecurringBasis	-2067000000	usd
CY2017	wfc	Increase Decrease In Fair Value Assets Measured On Nonrecurring Basis IncreaseDecreaseInFairValueAssetsMeasuredOnNonrecurringBasis	-1050000000	usd
CY2016	wfc	Increase Decrease In Fair Value Assets Measured On Nonrecurring Basis Loans Held For Sale IncreaseDecreaseInFairValueAssetsMeasuredOnNonrecurringBasisLoansHeldForSale	0	usd
CY2017	wfc	Increase Decrease In Fair Value Assets Measured On Nonrecurring Basis Loans Held For Sale IncreaseDecreaseInFairValueAssetsMeasuredOnNonrecurringBasisLoansHeldForSale	-2000000	usd
CY2016	wfc	Increase Decrease In Fair Value Assets Measured On Nonrecurring Basis Loans Receivable IncreaseDecreaseInFairValueAssetsMeasuredOnNonrecurringBasisLoansReceivable	-1630000000	usd
CY2017	wfc	Increase Decrease In Fair Value Assets Measured On Nonrecurring Basis Loans Receivable IncreaseDecreaseInFairValueAssetsMeasuredOnNonrecurringBasisLoansReceivable	-759000000	usd
CY2016	wfc	Increase Decrease In Fair Value Assets Measured On Nonrecurring Basis Mortgage Loans Held For Sale IncreaseDecreaseInFairValueAssetsMeasuredOnNonrecurringBasisMortgageLoansHeldForSale	1000000	usd
CY2017	wfc	Increase Decrease In Fair Value Assets Measured On Nonrecurring Basis Mortgage Loans Held For Sale IncreaseDecreaseInFairValueAssetsMeasuredOnNonrecurringBasisMortgageLoansHeldForSale	10000000	usd
CY2016	wfc	Increase Decrease In Fair Value Assets Measured On Nonrecurring Basis Other Assets IncreaseDecreaseInFairValueAssetsMeasuredOnNonrecurringBasisOtherAssets	-438000000	usd
CY2017	wfc	Increase Decrease In Fair Value Assets Measured On Nonrecurring Basis Other Assets IncreaseDecreaseInFairValueAssetsMeasuredOnNonrecurringBasisOtherAssets	-299000000	usd
CY2015	wfc	Increase Decrease In Noncontrolling Interests IncreaseDecreaseInNoncontrollingInterests	-422000000	usd
CY2016	wfc	Increase Decrease In Noncontrolling Interests IncreaseDecreaseInNoncontrollingInterests	-186000000	usd
CY2017	wfc	Increase Decrease In Noncontrolling Interests IncreaseDecreaseInNoncontrollingInterests	12000000	usd
CY2015	wfc	Increase Decrease In Trading Assets IncreaseDecreaseInTradingAssets	42754000000	usd
CY2016	wfc	Increase Decrease In Trading Assets IncreaseDecreaseInTradingAssets	62550000000	usd
CY2017	wfc	Increase Decrease In Trading Assets IncreaseDecreaseInTradingAssets	33332000000	usd
CY2014Q4	wfc	Liability For Mortgage Loan Repurchase Losses LiabilityForMortgageLoanRepurchaseLosses	615000000	usd
CY2015Q4	wfc	Liability For Mortgage Loan Repurchase Losses LiabilityForMortgageLoanRepurchaseLosses	378000000	usd
CY2016Q4	wfc	Liability For Mortgage Loan Repurchase Losses LiabilityForMortgageLoanRepurchaseLosses	229000000	usd
CY2017Q4	wfc	Liability For Mortgage Loan Repurchase Losses LiabilityForMortgageLoanRepurchaseLosses	181000000	usd
CY2015	wfc	Liability For Mortgage Loan Repurchase Losses Additions LiabilityForMortgageLoanRepurchaseLossesAdditions	-159000000	usd
CY2016	wfc	Liability For Mortgage Loan Repurchase Losses Additions LiabilityForMortgageLoanRepurchaseLossesAdditions	-103000000	usd
CY2017	wfc	Liability For Mortgage Loan Repurchase Losses Additions LiabilityForMortgageLoanRepurchaseLossesAdditions	-39000000	usd
CY2015	wfc	Liability For Mortgage Loan Repurchase Losses Additions Change In Estimate Primarily Due To Credit Deterioration LiabilityForMortgageLoanRepurchaseLossesAdditionsChangeInEstimatePrimarilyDueToCreditDeterioration	-202000000	usd
CY2016	wfc	Liability For Mortgage Loan Repurchase Losses Additions Change In Estimate Primarily Due To Credit Deterioration LiabilityForMortgageLoanRepurchaseLossesAdditionsChangeInEstimatePrimarilyDueToCreditDeterioration	-139000000	usd
CY2017	wfc	Liability For Mortgage Loan Repurchase Losses Additions Change In Estimate Primarily Due To Credit Deterioration LiabilityForMortgageLoanRepurchaseLossesAdditionsChangeInEstimatePrimarilyDueToCreditDeterioration	-63000000	usd
CY2015	wfc	Liability For Mortgage Loan Repurchase Losses Additions Sales LiabilityForMortgageLoanRepurchaseLossesAdditionsSales	43000000	usd
CY2016	wfc	Liability For Mortgage Loan Repurchase Losses Additions Sales LiabilityForMortgageLoanRepurchaseLossesAdditionsSales	36000000	usd
CY2017	wfc	Liability For Mortgage Loan Repurchase Losses Additions Sales LiabilityForMortgageLoanRepurchaseLossesAdditionsSales	24000000	usd
CY2015	wfc	Liability For Mortgage Loan Repurchase Losses Assumedwith Msr Purchases LiabilityForMortgageLoanRepurchaseLossesAssumedwithMSRPurchases	0	usd
CY2016	wfc	Liability For Mortgage Loan Repurchase Losses Assumedwith Msr Purchases LiabilityForMortgageLoanRepurchaseLossesAssumedwithMSRPurchases	0	usd
CY2017	wfc	Liability For Mortgage Loan Repurchase Losses Assumedwith Msr Purchases LiabilityForMortgageLoanRepurchaseLossesAssumedwithMSRPurchases	10000000	usd
CY2015	wfc	Liability For Mortgage Loan Repurchase Losses Reductions Losses LiabilityForMortgageLoanRepurchaseLossesReductionsLosses	78000000	usd
CY2016	wfc	Liability For Mortgage Loan Repurchase Losses Reductions Losses LiabilityForMortgageLoanRepurchaseLossesReductionsLosses	46000000	usd
CY2017	wfc	Liability For Mortgage Loan Repurchase Losses Reductions Losses LiabilityForMortgageLoanRepurchaseLossesReductionsLosses	19000000	usd
CY2016Q4	wfc	Loans And Leases Receivable Commitment To Lend LoansAndLeasesReceivableCommitmentToLend	551524000000	usd
CY2017Q4	wfc	Loans And Leases Receivable Commitment To Lend LoansAndLeasesReceivableCommitmentToLend	555511000000	usd
CY2015	wfc	Loans Originated By Nonbank Entities LoansOriginatedByNonbankEntities	7437000000	usd
CY2016	wfc	Loans Originated By Nonbank Entities LoansOriginatedByNonbankEntities	7743000000	usd
CY2017	wfc	Loans Originated By Nonbank Entities LoansOriginatedByNonbankEntities	6814000000	usd
CY2016Q4	wfc	Loans Serviced For Others LoansServicedForOthers	1684000000000	usd
CY2017Q4	wfc	Loans Serviced For Others LoansServicedForOthers	1704000000000	usd
CY2016Q4	wfc	Managed Servicing Portfolio ManagedServicingPortfolio	2179000000000	usd
CY2017Q4	wfc	Managed Servicing Portfolio ManagedServicingPortfolio	2185000000000	usd
CY2015	wfc	Marketable Securities Available For Sale And Held To Maturity Securities Realized Gain Loss MarketableSecuritiesAvailableForSaleAndHeldToMaturitySecuritiesRealizedGainLoss	1523000000	usd
CY2016	wfc	Marketable Securities Available For Sale And Held To Maturity Securities Realized Gain Loss MarketableSecuritiesAvailableForSaleAndHeldToMaturitySecuritiesRealizedGainLoss	1242000000	usd
CY2017	wfc	Marketable Securities Available For Sale And Held To Maturity Securities Realized Gain Loss MarketableSecuritiesAvailableForSaleAndHeldToMaturitySecuritiesRealizedGainLoss	935000000	usd
CY2015	wfc	Mortgage Servicing Noninterest Income MortgageServicingNoninterestIncome	2441000000	usd
CY2016	wfc	Mortgage Servicing Noninterest Income MortgageServicingNoninterestIncome	1765000000	usd
CY2017	wfc	Mortgage Servicing Noninterest Income MortgageServicingNoninterestIncome	1427000000	usd
CY2017	wfc	Municipal Bond Floating Rate Investors Right To Tender Period MunicipalBondFloatingRateInvestorsRightToTenderPeriod	P7D
CY2015	wfc	Net Change In Federal Funds Sold Securities Purchased Under Resale Agreements And Other Short Term Investments NetChangeInFederalFundsSoldSecuritiesPurchasedUnderResaleAgreementsAndOtherShortTermInvestments	10677000000	usd
CY2016	wfc	Net Change In Federal Funds Sold Securities Purchased Under Resale Agreements And Other Short Term Investments NetChangeInFederalFundsSoldSecuritiesPurchasedUnderResaleAgreementsAndOtherShortTermInvestments	15747000000	usd
CY2017	wfc	Net Change In Federal Funds Sold Securities Purchased Under Resale Agreements And Other Short Term Investments NetChangeInFederalFundsSoldSecuritiesPurchasedUnderResaleAgreementsAndOtherShortTermInvestments	21497000000	usd
CY2015	wfc	Net Derivative Gains Losses From Economic Hedges Related To Mortgage Servicing Activities NetDerivativeGainsLossesFromEconomicHedgesRelatedToMortgageServicingActivities	671000000	usd
CY2016	wfc	Net Derivative Gains Losses From Economic Hedges Related To Mortgage Servicing Activities NetDerivativeGainsLossesFromEconomicHedgesRelatedToMortgageServicingActivities	261000000	usd
CY2017	wfc	Net Derivative Gains Losses From Economic Hedges Related To Mortgage Servicing Activities NetDerivativeGainsLossesFromEconomicHedgesRelatedToMortgageServicingActivities	413000000	usd
CY2015	wfc	Net Gains Losses From Equity Investments NetGainsLossesFromEquityInvestments	2230000000	usd
CY2016	wfc	Net Gains Losses From Equity Investments NetGainsLossesFromEquityInvestments	879000000	usd
CY2017	wfc	Net Gains Losses From Equity Investments NetGainsLossesFromEquityInvestments	1268000000	usd
CY2015	wfc	Net Gains Losses From Nonmarketable Equity Securities NetGainsLossesFromNonmarketableEquitySecurities	1659000000	usd
CY2016	wfc	Net Gains Losses From Nonmarketable Equity Securities NetGainsLossesFromNonmarketableEquitySecurities	579000000	usd
CY2017	wfc	Net Gains Losses From Nonmarketable Equity Securities NetGainsLossesFromNonmarketableEquitySecurities	812000000	usd
CY2015	wfc	Net Income Expense From Nonmarketable Equity Investments Total NetIncomeExpenseFromNonmarketableEquityInvestmentsTotal	916000000	usd
CY2016	wfc	Net Income Expense From Nonmarketable Equity Investments Total NetIncomeExpenseFromNonmarketableEquityInvestmentsTotal	71000000	usd
CY2017	wfc	Net Income Expense From Nonmarketable Equity Investments Total NetIncomeExpenseFromNonmarketableEquityInvestmentsTotal	-230000000	usd
CY2015	wfc	Net Increase Decrease In Deferred Compensation And Related Plans NetIncreaseDecreaseInDeferredCompensationAndRelatedPlans	-1057000000	usd
CY2016	wfc	Net Increase Decrease In Deferred Compensation And Related Plans NetIncreaseDecreaseInDeferredCompensationAndRelatedPlans	-1069000000	usd
CY2017	wfc	Net Increase Decrease In Deferred Compensation And Related Plans NetIncreaseDecreaseInDeferredCompensationAndRelatedPlans	-845000000	usd
CY2013	wfc	Net Loan Charge Offs Annualized As Percentage Of Average Loans NetLoanChargeOffsAnnualizedAsPercentageOfAverageLoans	0.0056
CY2014	wfc	Net Loan Charge Offs Annualized As Percentage Of Average Loans NetLoanChargeOffsAnnualizedAsPercentageOfAverageLoans	0.0035
CY2015	wfc	Net Loan Charge Offs Annualized As Percentage Of Average Loans NetLoanChargeOffsAnnualizedAsPercentageOfAverageLoans	0.0033
CY2016	wfc	Net Loan Charge Offs Annualized As Percentage Of Average Loans NetLoanChargeOffsAnnualizedAsPercentageOfAverageLoans	0.0037
CY2017	wfc	Net Loan Charge Offs Annualized As Percentage Of Average Loans NetLoanChargeOffsAnnualizedAsPercentageOfAverageLoans	0.0031
CY2015	wfc	Net Transfers From Loans To Mortgage Held For Sale NetTransfersFromLoansToMortgageHeldForSale	9205000000	usd
CY2016	wfc	Net Transfers From Loans To Mortgage Held For Sale NetTransfersFromLoansToMortgageHeldForSale	6894000000	usd
CY2017	wfc	Net Transfers From Loans To Mortgage Held For Sale NetTransfersFromLoansToMortgageHeldForSale	5500000000	usd
CY2016Q4	wfc	Non Residential Real Estate Foreclosed Assets NonResidentialRealEstateForeclosedAssets	403000000	usd
CY2017Q4	wfc	Non Residential Real Estate Foreclosed Assets NonResidentialRealEstateForeclosedAssets	270000000	usd
CY2015	wfc	Noninterest Income Other Loss NoninterestIncomeOtherLoss	464000000	usd
CY2016	wfc	Noninterest Income Other Loss NoninterestIncomeOtherLoss	1289000000	usd
CY2017	wfc	Noninterest Income Other Loss NoninterestIncomeOtherLoss	1603000000	usd
CY2016Q4	wfc	Nonmarketable Equity Securities NonmarketableEquitySecurities	27380000000	usd
CY2017Q4	wfc	Nonmarketable Equity Securities NonmarketableEquitySecurities	28382000000	usd
CY2017	wfc	Numberof Divestitures NumberofDivestitures	1	business
CY2017	wfc	Operating Leases For Premises And Equipment Longest Term Expiration Date OperatingLeasesForPremisesAndEquipmentLongestTermExpirationDate	2105
CY2017	wfc	Operating Leases For Premises And Equipment Term In Years OperatingLeasesForPremisesAndEquipmentTermInYears	P15Y
CY2015	wfc	Operating Leases Income Statement Depreciationand Other Expenseon Property Subjecttoor Heldforlease OperatingLeasesIncomeStatementDepreciationandOtherExpenseonPropertySubjecttoorHeldforlease	978000000	usd
CY2016	wfc	Operating Leases Income Statement Depreciationand Other Expenseon Property Subjecttoor Heldforlease OperatingLeasesIncomeStatementDepreciationandOtherExpenseonPropertySubjecttoorHeldforlease	1203000000	usd
CY2017	wfc	Operating Leases Income Statement Depreciationand Other Expenseon Property Subjecttoor Heldforlease OperatingLeasesIncomeStatementDepreciationandOtherExpenseonPropertySubjecttoorHeldforlease	1369000000	usd
CY2015	wfc	Operating Losses OperatingLosses	2665000000	usd
CY2016	wfc	Operating Losses OperatingLosses	3138000000	usd
CY2017	wfc	Operating Losses OperatingLosses	3813000000	usd
CY2015	wfc	Other Comprehensive Income Foreign Currency Transaction And Translation Reclassification Adjustment Net Losses To Net Income After Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationReclassificationAdjustmentNetLossesToNetIncomeAfterTax	-5000000	usd
CY2016	wfc	Other Comprehensive Income Foreign Currency Transaction And Translation Reclassification Adjustment Net Losses To Net Income After Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationReclassificationAdjustmentNetLossesToNetIncomeAfterTax	0	usd
CY2017	wfc	Other Comprehensive Income Foreign Currency Transaction And Translation Reclassification Adjustment Net Losses To Net Income After Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationReclassificationAdjustmentNetLossesToNetIncomeAfterTax	0	usd
CY2015	wfc	Other Comprehensive Income Foreign Currency Transaction And Translation Reclassification Adjustment Net Losses To Net Income Before Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationReclassificationAdjustmentNetLossesToNetIncomeBeforeTax	-5000000	usd
CY2016	wfc	Other Comprehensive Income Foreign Currency Transaction And Translation Reclassification Adjustment Net Losses To Net Income Before Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationReclassificationAdjustmentNetLossesToNetIncomeBeforeTax	0	usd
CY2017	wfc	Other Comprehensive Income Foreign Currency Transaction And Translation Reclassification Adjustment Net Losses To Net Income Before Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationReclassificationAdjustmentNetLossesToNetIncomeBeforeTax	0	usd
CY2015	wfc	Other Comprehensive Income Foreign Currency Transaction And Translation Reclassification Adjustment Net Losses To Net Income Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationReclassificationAdjustmentNetLossesToNetIncomeTax	0	usd
CY2016	wfc	Other Comprehensive Income Foreign Currency Transaction And Translation Reclassification Adjustment Net Losses To Net Income Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationReclassificationAdjustmentNetLossesToNetIncomeTax	0	usd
CY2017	wfc	Other Comprehensive Income Foreign Currency Transaction And Translation Reclassification Adjustment Net Losses To Net Income Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationReclassificationAdjustmentNetLossesToNetIncomeTax	0	usd
CY2015	wfc	Other Comprehensive Income Loss Other Reclassification Adjustments From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossOtherReclassificationAdjustmentsFromAociPensionAndOtherPostretirementBenefitPlansBeforeTax	-8000000	usd
CY2016	wfc	Other Comprehensive Income Loss Other Reclassification Adjustments From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossOtherReclassificationAdjustmentsFromAociPensionAndOtherPostretirementBenefitPlansBeforeTax	5000000	usd
CY2017	wfc	Other Comprehensive Income Loss Other Reclassification Adjustments From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossOtherReclassificationAdjustmentsFromAociPensionAndOtherPostretirementBenefitPlansBeforeTax	3000000	usd
CY2015	wfc	Other Comprehensive Income Loss Other Reclassification Adjustments From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossOtherReclassificationAdjustmentsFromAociPensionAndOtherPostretirementBenefitPlansNetOfTax	-5000000	usd
CY2016	wfc	Other Comprehensive Income Loss Other Reclassification Adjustments From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossOtherReclassificationAdjustmentsFromAociPensionAndOtherPostretirementBenefitPlansNetOfTax	4000000	usd
CY2017	wfc	Other Comprehensive Income Loss Other Reclassification Adjustments From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossOtherReclassificationAdjustmentsFromAociPensionAndOtherPostretirementBenefitPlansNetOfTax	5000000	usd
CY2015	wfc	Other Comprehensive Income Loss Other Reclassification Adjustments From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossOtherReclassificationAdjustmentsFromAociPensionAndOtherPostretirementBenefitPlansTax	-3000000	usd
CY2016	wfc	Other Comprehensive Income Loss Other Reclassification Adjustments From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossOtherReclassificationAdjustmentsFromAociPensionAndOtherPostretirementBenefitPlansTax	1000000	usd
CY2017	wfc	Other Comprehensive Income Loss Other Reclassification Adjustments From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossOtherReclassificationAdjustmentsFromAociPensionAndOtherPostretirementBenefitPlansTax	-2000000	usd
CY2015	wfc	Other Comprehensive Income Loss Reclassification Adjustment For Sale Or Write Down Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOrWriteDownOfSecuritiesIncludedInNetIncomeBeforeTax	-1530000000	usd
CY2016	wfc	Other Comprehensive Income Loss Reclassification Adjustment For Sale Or Write Down Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOrWriteDownOfSecuritiesIncludedInNetIncomeBeforeTax	-1240000000	usd
CY2017	wfc	Other Comprehensive Income Loss Reclassification Adjustment For Sale Or Write Down Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOrWriteDownOfSecuritiesIncludedInNetIncomeBeforeTax	-737000000	usd
CY2015	wfc	Other Comprehensive Income Loss Reclassification Adjustment For Sale Or Write Down Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOrWriteDownOfSecuritiesIncludedInNetIncomeNetOfTax	-958000000	usd
CY2016	wfc	Other Comprehensive Income Loss Reclassification Adjustment For Sale Or Write Down Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOrWriteDownOfSecuritiesIncludedInNetIncomeNetOfTax	-773000000	usd
CY2017	wfc	Other Comprehensive Income Loss Reclassification Adjustment For Sale Or Write Down Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOrWriteDownOfSecuritiesIncludedInNetIncomeNetOfTax	-459000000	usd
CY2015	wfc	Other Comprehensive Income Loss Reclassification Adjustment For Sale Or Write Down Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOrWriteDownOfSecuritiesIncludedInNetIncomeTax	-572000000	usd
CY2016	wfc	Other Comprehensive Income Loss Reclassification Adjustment For Sale Or Write Down Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOrWriteDownOfSecuritiesIncludedInNetIncomeTax	-467000000	usd
CY2017	wfc	Other Comprehensive Income Loss Reclassification Adjustment For Sale Or Write Down Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOrWriteDownOfSecuritiesIncludedInNetIncomeTax	-278000000	usd
CY2015	wfc	Other Comprehensive Income Loss Reclassification Adjustment Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentNetOfTax	-1570000000	usd
CY2016	wfc	Other Comprehensive Income Loss Reclassification Adjustment Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentNetOfTax	-1314000000	usd
CY2017	wfc	Other Comprehensive Income Loss Reclassification Adjustment Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentNetOfTax	-699000000	usd
CY2015	wfc	Other Comprehensive Income Loss Unrealized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeLossUnrealizedGainLossArisingDuringPeriodNetOfTax	-1584000000	usd
CY2016	wfc	Other Comprehensive Income Loss Unrealized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeLossUnrealizedGainLossArisingDuringPeriodNetOfTax	-2137000000	usd
CY2017	wfc	Other Comprehensive Income Loss Unrealized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeLossUnrealizedGainLossArisingDuringPeriodNetOfTax	1462000000	usd
CY2017	wfc	Other Comprehensive Income Losstaxexpensebenefitnotadjustedin Oci OtherComprehensiveIncomeLosstaxexpensebenefitnotadjustedinOCI	400000000	usd
CY2015	wfc	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Amortization Of Net Prior Service Cost Credit And Finalization Of Valuation Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossAmortizationOfNetPriorServiceCostCreditAndFinalizationOfValuationRecognizedInNetPeriodicBenefitCostBeforeTax	114000000	usd
CY2016	wfc	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Amortization Of Net Prior Service Cost Credit And Finalization Of Valuation Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossAmortizationOfNetPriorServiceCostCreditAndFinalizationOfValuationRecognizedInNetPeriodicBenefitCostBeforeTax	158000000	usd
CY2017	wfc	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Amortization Of Net Prior Service Cost Credit And Finalization Of Valuation Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossAmortizationOfNetPriorServiceCostCreditAndFinalizationOfValuationRecognizedInNetPeriodicBenefitCostBeforeTax	153000000	usd
CY2015	wfc	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Amortization Of Net Prior Service Cost Credit And Finalization Of Valuation Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossAmortizationOfNetPriorServiceCostCreditAndFinalizationOfValuationRecognizedInNetPeriodicBenefitCostNetOfTax	71000000	usd
CY2016	wfc	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Amortization Of Net Prior Service Cost Credit And Finalization Of Valuation Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossAmortizationOfNetPriorServiceCostCreditAndFinalizationOfValuationRecognizedInNetPeriodicBenefitCostNetOfTax	100000000	usd
CY2017	wfc	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Amortization Of Net Prior Service Cost Credit And Finalization Of Valuation Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossAmortizationOfNetPriorServiceCostCreditAndFinalizationOfValuationRecognizedInNetPeriodicBenefitCostNetOfTax	98000000	usd
CY2015	wfc	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Amortization Of Net Prior Service Cost Credit And Finalization Of Valuation Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossAmortizationOfNetPriorServiceCostCreditAndFinalizationOfValuationRecognizedInNetPeriodicBenefitCostTax	43000000	usd
CY2016	wfc	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Amortization Of Net Prior Service Cost Credit And Finalization Of Valuation Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossAmortizationOfNetPriorServiceCostCreditAndFinalizationOfValuationRecognizedInNetPeriodicBenefitCostTax	58000000	usd
CY2017	wfc	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Amortization Of Net Prior Service Cost Credit And Finalization Of Valuation Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossAmortizationOfNetPriorServiceCostCreditAndFinalizationOfValuationRecognizedInNetPeriodicBenefitCostTax	55000000	usd
CY2015	wfc	Other Than Temporary Impairment Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentInvestmentsPortionRecognizedInEarningsNet	559000000	usd
CY2016	wfc	Other Than Temporary Impairment Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentInvestmentsPortionRecognizedInEarningsNet	642000000	usd
CY2017	wfc	Other Than Temporary Impairment Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentInvestmentsPortionRecognizedInEarningsNet	606000000	usd
CY2015	wfc	Other Than Temporary Impairment Losses Availablefor Sale And Heldto Maturity Debt Securities Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesAvailableforSaleAndHeldtoMaturityDebtSecuritiesPortionRecognizedInEarningsNet	185000000	usd
CY2016	wfc	Other Than Temporary Impairment Losses Availablefor Sale And Heldto Maturity Debt Securities Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesAvailableforSaleAndHeldtoMaturityDebtSecuritiesPortionRecognizedInEarningsNet	194000000	usd
CY2017	wfc	Other Than Temporary Impairment Losses Availablefor Sale And Heldto Maturity Debt Securities Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesAvailableforSaleAndHeldtoMaturityDebtSecuritiesPortionRecognizedInEarningsNet	267000000	usd
CY2015	wfc	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Available For Sale Equity Securities And Nonmarketable Equity Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableForSaleEquitySecuritiesAndNonmarketableEquitySecurities	376000000	usd
CY2016	wfc	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Available For Sale Equity Securities And Nonmarketable Equity Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableForSaleEquitySecuritiesAndNonmarketableEquitySecurities	453000000	usd
CY2017	wfc	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Available For Sale Equity Securities And Nonmarketable Equity Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableForSaleEquitySecuritiesAndNonmarketableEquitySecurities	344000000	usd
CY2015	wfc	Payments For Loans Originated By Banking Subsidiaries Net Of Proceeds From Collections PaymentsForLoansOriginatedByBankingSubsidiariesNetOfProceedsFromCollections	57020000000	usd
CY2016	wfc	Payments For Loans Originated By Banking Subsidiaries Net Of Proceeds From Collections PaymentsForLoansOriginatedByBankingSubsidiariesNetOfProceedsFromCollections	39002000000	usd
CY2017	wfc	Payments For Loans Originated By Banking Subsidiaries Net Of Proceeds From Collections PaymentsForLoansOriginatedByBankingSubsidiariesNetOfProceedsFromCollections	-317000000	usd
CY2015	wfc	Paymentsfor Originationandpurchasesof Mortgage Loans Heldforsaleand Other Loans Heldfor Sale PaymentsforOriginationandpurchasesofMortgageLoansHeldforsaleandOtherLoansHeldforSale	178294000000	usd
CY2016	wfc	Paymentsfor Originationandpurchasesof Mortgage Loans Heldforsaleand Other Loans Heldfor Sale PaymentsforOriginationandpurchasesofMortgageLoansHeldforsaleandOtherLoansHeldforSale	205314000000	usd
CY2015	wfc	Proceeds From Sale Of Foreclosed Assets And Short Sales ProceedsFromSaleOfForeclosedAssetsAndShortSales	7803000000	usd
CY2016	wfc	Proceeds From Sale Of Foreclosed Assets And Short Sales ProceedsFromSaleOfForeclosedAssetsAndShortSales	7311000000	usd
CY2017	wfc	Paymentsfor Originationandpurchasesof Mortgage Loans Heldforsaleand Other Loans Heldfor Sale PaymentsforOriginationandpurchasesofMortgageLoansHeldforsaleandOtherLoansHeldforSale	181321000000	usd
CY2015	wfc	Paymentsto Acquire Nonmarketable Equity Investments PaymentstoAcquireNonmarketableEquityInvestments	2352000000	usd
CY2016	wfc	Paymentsto Acquire Nonmarketable Equity Investments PaymentstoAcquireNonmarketableEquityInvestments	4316000000	usd
CY2017	wfc	Paymentsto Acquire Nonmarketable Equity Investments PaymentstoAcquireNonmarketableEquityInvestments	3023000000	usd
CY2016Q4	wfc	Percentage Of Underlying Collateral Rated As Investment Grade PercentageOfUnderlyingCollateralRatedAsInvestmentGrade	1.00
CY2017Q4	wfc	Percentage Of Underlying Collateral Rated As Investment Grade PercentageOfUnderlyingCollateralRatedAsInvestmentGrade	1.00
CY2017	wfc	Percentage Share Of Losses Owed On Loans And Mhfs Sold With Recourse PercentageShareOfLossesOwedOnLoansAndMHFSSoldWithRecourse	0.3333
CY2015	wfc	Performance Stock Expense PerformanceStockExpense	169000000	usd
CY2016	wfc	Performance Stock Expense PerformanceStockExpense	87000000	usd
CY2017	wfc	Performance Stock Expense PerformanceStockExpense	112000000	usd
CY2015	wfc	Preferred Stock Amount PreferredStockAmount	2972000000	usd
CY2016	wfc	Preferred Stock Amount PreferredStockAmount	2101000000	usd
CY2017	wfc	Preferred Stock Amount PreferredStockAmount	677000000	usd
CY2016Q4	wfc	Preferred Stock Par Or Stated Value PreferredStockParOrStatedValue	25950000000	usd
CY2017Q4	wfc	Preferred Stock Par Or Stated Value PreferredStockParOrStatedValue	26757000000	usd
CY2015	wfc	Preferred Stock Released By Employee Stock Option Plan PreferredStockReleasedByEmployeeStockOptionPlan	825000000	usd
CY2016	wfc	Preferred Stock Released By Employee Stock Option Plan PreferredStockReleasedByEmployeeStockOptionPlan	963000000	usd
CY2017	wfc	Preferred Stock Released By Employee Stock Option Plan PreferredStockReleasedByEmployeeStockOptionPlan	833000000	usd
CY2016Q4	wfc	Preferred Stock Shares Authorized And Designated PreferredStockSharesAuthorizedAndDesignated	11941891	shares
CY2017Q4	wfc	Preferred Stock Shares Authorized And Designated PreferredStockSharesAuthorizedAndDesignated	12036414	shares
CY2016Q4	wfc	Principal Amount That Would Be Payable To Securitization Vehicles PrincipalAmountThatWouldBePayableToSecuritizationVehicles	1200000000	usd
CY2017Q4	wfc	Principal Amount That Would Be Payable To Securitization Vehicles PrincipalAmountThatWouldBePayableToSecuritizationVehicles	2200000000	usd
CY2015	wfc	Principal Collected On Nonbank Entities Loans PrincipalCollectedOnNonbankEntitiesLoans	5023000000	usd
CY2016	wfc	Principal Collected On Nonbank Entities Loans PrincipalCollectedOnNonbankEntitiesLoans	6844000000	usd
CY2017	wfc	Principal Collected On Nonbank Entities Loans PrincipalCollectedOnNonbankEntitiesLoans	7448000000	usd
CY2017	wfc	Proceeds From Sale Of Foreclosed Assets And Short Sales ProceedsFromSaleOfForeclosedAssetsAndShortSales	5198000000	usd
CY2015	wfc	Proceeds From Salesofand Paydownson Mortgages Originated For Saleand Other Loans Held For Sale ProceedsFromSalesofandPaydownsonMortgagesOriginatedForSaleandOtherLoansHeldForSale	133201000000	usd
CY2016	wfc	Proceeds From Salesofand Paydownson Mortgages Originated For Saleand Other Loans Held For Sale ProceedsFromSalesofandPaydownsonMortgagesOriginatedForSaleandOtherLoansHeldForSale	127488000000	usd
CY2017	wfc	Proceeds From Salesofand Paydownson Mortgages Originated For Saleand Other Loans Held For Sale ProceedsFromSalesofandPaydownsonMortgagesOriginatedForSaleandOtherLoansHeldForSale	135054000000	usd
CY2015	wfc	Proceedsfrom Saleof Nonmarketable Equity Investments ProceedsfromSaleofNonmarketableEquityInvestments	3496000000	usd
CY2016	wfc	Proceedsfrom Saleof Nonmarketable Equity Investments ProceedsfromSaleofNonmarketableEquityInvestments	1975000000	usd
CY2017	wfc	Proceedsfrom Saleof Nonmarketable Equity Investments ProceedsfromSaleofNonmarketableEquityInvestments	3982000000	usd
CY2017Q3	wfc	Rmb Strustsatissueinthe State Court Action RMBStrustsatissueintheStateCourtAction	11
CY2016Q4	wfc	Ratio Of Mortgage Servicing Rights To Related Loans Serviced For Others RatioOfMortgageServicingRightsToRelatedLoansServicedForOthers	0.0085
CY2017Q4	wfc	Ratio Of Mortgage Servicing Rights To Related Loans Serviced For Others RatioOfMortgageServicingRightsToRelatedLoansServicedForOthers	0.0088
CY2016Q4	wfc	Resale Agreements Funded Amounts Outstanding ResaleAgreementsFundedAmountsOutstanding	0	usd
CY2017Q4	wfc	Resale Agreements Funded Amounts Outstanding ResaleAgreementsFundedAmountsOutstanding	0	usd
CY2016Q4	wfc	Resale Agreements Unfunded Commitments ResaleAgreementsUnfundedCommitments	2900000000	usd
CY2017Q4	wfc	Resale Agreements Unfunded Commitments ResaleAgreementsUnfundedCommitments	2800000000	usd
CY2015	wfc	Revenue Recognition Cardholder Rebates Rewards RevenueRecognitionCardholderRebatesRewards	900000000	usd
CY2015	wfc	Revenue Recognition Cardholder Rebates Rewards RevenueRecognitionCardholderRebatesRewards	863000000	usd
CY2016	wfc	Revenue Recognition Cardholder Rebates Rewards RevenueRecognitionCardholderRebatesRewards	1000000000	usd
CY2016	wfc	Revenue Recognition Cardholder Rebates Rewards RevenueRecognitionCardholderRebatesRewards	1047000000	usd
CY2017	wfc	Revenue Recognition Cardholder Rebates Rewards RevenueRecognitionCardholderRebatesRewards	1200000000	usd
CY2017	wfc	Revenue Recognition Cardholder Rebates Rewards RevenueRecognitionCardholderRebatesRewards	1201000000	usd
CY2016Q4	wfc	Securities Of Single Issuer With Book Value Greater Than Ten Percent Of Stockholders Equity Amount SecuritiesOfSingleIssuerWithBookValueGreaterThanTenPercentOfStockholdersEquityAmount	0	usd
CY2017Q4	wfc	Securities Of Single Issuer With Book Value Greater Than Ten Percent Of Stockholders Equity Amount SecuritiesOfSingleIssuerWithBookValueGreaterThanTenPercentOfStockholdersEquityAmount	0	usd
CY2016Q4	wfc	Securities Purchased Under Agreements To Resell And Securities Borrowed Amount Offset Against Collateral SecuritiesPurchasedUnderAgreementsToResellAndSecuritiesBorrowedAmountOffsetAgainstCollateral	11680000000	usd
CY2017Q4	wfc	Securities Purchased Under Agreements To Resell And Securities Borrowed Amount Offset Against Collateral SecuritiesPurchasedUnderAgreementsToResellAndSecuritiesBorrowedAmountOffsetAgainstCollateral	23188000000	usd
CY2016Q4	wfc	Securities Purchased Under Agreements To Resell And Securities Borrowed Collateral SecuritiesPurchasedUnderAgreementsToResellAndSecuritiesBorrowedCollateral	78837000000	usd
CY2017Q4	wfc	Securities Purchased Under Agreements To Resell And Securities Borrowed Collateral SecuritiesPurchasedUnderAgreementsToResellAndSecuritiesBorrowedCollateral	96829000000	usd
CY2016Q4	wfc	Securities Purchased Under Agreements To Resell And Securities Borrowed Gross SecuritiesPurchasedUnderAgreementsToResellAndSecuritiesBorrowedGross	91123000000	usd
CY2017Q4	wfc	Securities Purchased Under Agreements To Resell And Securities Borrowed Gross SecuritiesPurchasedUnderAgreementsToResellAndSecuritiesBorrowedGross	121135000000	usd
CY2016Q4	wfc	Securities Purchased Under Agreements To Resell And Securities Borrowed Net SecuritiesPurchasedUnderAgreementsToResellAndSecuritiesBorrowedNet	606000000	usd
CY2017Q4	wfc	Securities Purchased Under Agreements To Resell And Securities Borrowed Net SecuritiesPurchasedUnderAgreementsToResellAndSecuritiesBorrowedNet	1118000000	usd
CY2016Q4	wfc	Securities Purchased Under Agreements To Resell And Securities Borrowed Net Amount In Consolidated Balance Sheet SecuritiesPurchasedUnderAgreementsToResellAndSecuritiesBorrowedNetAmountInConsolidatedBalanceSheet	79443000000	usd
CY2017Q4	wfc	Securities Purchased Under Agreements To Resell And Securities Borrowed Net Amount In Consolidated Balance Sheet SecuritiesPurchasedUnderAgreementsToResellAndSecuritiesBorrowedNetAmountInConsolidatedBalanceSheet	97947000000	usd
CY2016Q4	wfc	Securities Sold Under Agreements To Repurchase And Securities Loaned Amount Offset Against Collateral SecuritiesSoldUnderAgreementsToRepurchaseAndSecuritiesLoanedAmountOffsetAgainstCollateral	11680000000	usd
CY2017Q4	wfc	Securities Sold Under Agreements To Repurchase And Securities Loaned Amount Offset Against Collateral SecuritiesSoldUnderAgreementsToRepurchaseAndSecuritiesLoanedAmountOffsetAgainstCollateral	23188000000	usd
CY2016Q4	wfc	Securities Sold Under Agreements To Repurchase And Securities Loaned Collateral SecuritiesSoldUnderAgreementsToRepurchaseAndSecuritiesLoanedCollateral	77184000000	usd
CY2017Q4	wfc	Securities Sold Under Agreements To Repurchase And Securities Loaned Collateral SecuritiesSoldUnderAgreementsToRepurchaseAndSecuritiesLoanedCollateral	87918000000	usd
CY2016Q4	wfc	Securities Sold Under Agreements To Repurchase And Securities Loaned Net SecuritiesSoldUnderAgreementsToRepurchaseAndSecuritiesLoanedNet	247000000	usd
CY2017Q4	wfc	Securities Sold Under Agreements To Repurchase And Securities Loaned Net SecuritiesSoldUnderAgreementsToRepurchaseAndSecuritiesLoanedNet	382000000	usd
CY2016Q4	wfc	Securities Sold Under Agreements To Repurchase And Securities Loaned Net Amount In Consolidated Balance Sheet SecuritiesSoldUnderAgreementsToRepurchaseAndSecuritiesLoanedNetAmountInConsolidatedBalanceSheet	77431000000	usd
CY2017Q4	wfc	Securities Sold Under Agreements To Repurchase And Securities Loaned Net Amount In Consolidated Balance Sheet SecuritiesSoldUnderAgreementsToRepurchaseAndSecuritiesLoanedNetAmountInConsolidatedBalanceSheet	88300000000	usd
CY2016	wfc	Segment Reporting Information Average Asset SegmentReportingInformationAverageAsset	1885400000000	usd
CY2017	wfc	Segment Reporting Information Average Asset SegmentReportingInformationAverageAsset	1933000000000	usd
CY2016	wfc	Segment Reporting Information Average Balance Of Loans Held In Portfolio SegmentReportingInformationAverageBalanceOfLoansHeldInPortfolio	950000000000	usd
CY2017	wfc	Segment Reporting Information Average Balance Of Loans Held In Portfolio SegmentReportingInformationAverageBalanceOfLoansHeldInPortfolio	956100000000	usd
CY2016	wfc	Segment Reporting Information Average Deposits SegmentReportingInformationAverageDeposits	1250600000000	usd
CY2017	wfc	Segment Reporting Information Average Deposits SegmentReportingInformationAverageDeposits	1304600000000	usd
CY2015	wfc	Servicing Asset At Fair Value Sum Of Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions And Net Derivative Gains Losses ServicingAssetAtFairValueSumOfChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAndNetDerivativeGainsLosses	885000000	usd
CY2016	wfc	Servicing Asset At Fair Value Sum Of Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions And Net Derivative Gains Losses ServicingAssetAtFairValueSumOfChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAndNetDerivativeGainsLosses	826000000	usd
CY2017	wfc	Servicing Asset At Fair Value Sum Of Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions And Net Derivative Gains Losses ServicingAssetAtFairValueSumOfChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAndNetDerivativeGainsLosses	287000000	usd
CY2015	wfc	Servicing Fees Non Interest Income ServicingFeesNonInterestIncome	3898000000	usd
CY2016	wfc	Servicing Fees Non Interest Income ServicingFeesNonInterestIncome	3368000000	usd
CY2017	wfc	Servicing Fees Non Interest Income ServicingFeesNonInterestIncome	3392000000	usd
CY2015	wfc	Share Based Compensation And Preferred Stock Released By Employee Stock Option Plan ShareBasedCompensationAndPreferredStockReleasedByEmployeeStockOptionPlan	1958000000	usd
CY2016	wfc	Share Based Compensation And Preferred Stock Released By Employee Stock Option Plan ShareBasedCompensationAndPreferredStockReleasedByEmployeeStockOptionPlan	1945000000	usd
CY2017	wfc	Share Based Compensation And Preferred Stock Released By Employee Stock Option Plan ShareBasedCompensationAndPreferredStockReleasedByEmployeeStockOptionPlan	2046000000	usd
CY2015	wfc	Short Term Debt Average Weighted Average Interest Rate ShortTermDebtAverageWeightedAverageInterestRate	0.0007
CY2016	wfc	Short Term Debt Average Weighted Average Interest Rate ShortTermDebtAverageWeightedAverageInterestRate	0.0029
CY2017	wfc	Short Term Debt Average Weighted Average Interest Rate ShortTermDebtAverageWeightedAverageInterestRate	0.0077
CY2015	wfc	Short Term Debt Maturity Period ShortTermDebtMaturityPeriod	P30D
CY2016	wfc	Short Term Debt Maturity Period ShortTermDebtMaturityPeriod	P30D
CY2017	wfc	Short Term Debt Maturity Period ShortTermDebtMaturityPeriod	P30D
CY2015	wfc	Total Amountsof Line Items Presentedinthe Consolidated Statementof Income TotalAmountsofLineItemsPresentedintheConsolidatedStatementofIncome	43206000000	usd
CY2016	wfc	Total Amountsof Line Items Presentedinthe Consolidated Statementof Income TotalAmountsofLineItemsPresentedintheConsolidatedStatementofIncome	45601000000	usd
CY2017	wfc	Total Amountsof Line Items Presentedinthe Consolidated Statementof Income TotalAmountsofLineItemsPresentedintheConsolidatedStatementofIncome	46271000000	usd
CY2016Q4	wfc	Trading Assets TradingAssets	74397000000	usd
CY2017Q4	wfc	Trading Assets TradingAssets	92329000000	usd
CY2015	wfc	Transfers From Available For Sale Securities To Held To Maturity Securities TransfersFromAvailableForSaleSecuritiesToHeldToMaturitySecurities	4972000000	usd
CY2016	wfc	Transfers From Available For Sale Securities To Held To Maturity Securities TransfersFromAvailableForSaleSecuritiesToHeldToMaturitySecurities	4161000000	usd
CY2017	wfc	Transfers From Available For Sale Securities To Held To Maturity Securities TransfersFromAvailableForSaleSecuritiesToHeldToMaturitySecurities	50405000000	usd
CY2015	wfc	Transfers From Mortgage Held For Sale To Trading Assets TransfersFromMortgageHeldForSaleToTradingAssets	46291000000	usd
CY2016	wfc	Transfers From Mortgage Held For Sale To Trading Assets TransfersFromMortgageHeldForSaleToTradingAssets	72399000000	usd
CY2017	wfc	Transfers From Mortgage Held For Sale To Trading Assets TransfersFromMortgageHeldForSaleToTradingAssets	52435000000	usd
CY2016Q4	wfc	Unearned Esop Shares Cost UnearnedESOPSharesCost	1565000000	usd
CY2017Q4	wfc	Unearned Esop Shares Cost UnearnedESOPSharesCost	1678000000	usd
CY2017Q4	wfc	Unfunded Credit Commitments Consumer Mortgage Firstand Junior Linesof Credit Portfolio UnfundedCreditCommitmentsConsumerMortgageFirstandJuniorLinesofCreditPortfolio	62300000000	usd
CY2016Q4	wfc	Unpaid Principal Balance Of Mortgage Loans Eligible For Repurchase UnpaidPrincipalBalanceOfMortgageLoansEligibleForRepurchase	1200000000	usd
CY2017Q4	wfc	Unpaid Principal Balance Of Mortgage Loans Eligible For Repurchase UnpaidPrincipalBalanceOfMortgageLoansEligibleForRepurchase	2200000000	usd
CY2015	wfc	Unrealized Gain Loss On Mortgage Servicing Rights Mortgages Held For Sale And Loans Held For Sale UnrealizedGainLossOnMortgageServicingRightsMortgagesHeldForSaleAndLoansHeldForSale	-62000000	usd
CY2016	wfc	Unrealized Gain Loss On Mortgage Servicing Rights Mortgages Held For Sale And Loans Held For Sale UnrealizedGainLossOnMortgageServicingRightsMortgagesHeldForSaleAndLoansHeldForSale	-139000000	usd
CY2017	wfc	Unrealized Gain Loss On Mortgage Servicing Rights Mortgages Held For Sale And Loans Held For Sale UnrealizedGainLossOnMortgageServicingRightsMortgagesHeldForSaleAndLoansHeldForSale	-886000000	usd
CY2017Q4	wfc	Unrecognized Tax Benefits Related To Income Tax Positions On Temporary Differences UnrecognizedTaxBenefitsRelatedToIncomeTaxPositionsOnTemporaryDifferences	1700000000	usd
CY2015	wfc	Unreimbursed Direct Servicing Costs UnreimbursedDirectServicingCosts	625000000	usd
CY2016	wfc	Unreimbursed Direct Servicing Costs UnreimbursedDirectServicingCosts	819000000	usd
CY2017	wfc	Unreimbursed Direct Servicing Costs UnreimbursedDirectServicingCosts	582000000	usd
CY2016Q4	wfc	Variable Interest Entity Nonconsolidated Assets VariableInterestEntityNonconsolidatedAssets	1395604000000	usd
CY2017Q4	wfc	Variable Interest Entity Nonconsolidated Assets VariableInterestEntityNonconsolidatedAssets	1367437000000	usd
CY2016	wfc	Warrants Purchased WarrantsPurchased	0	shares
CY2017	wfc	Warrants Purchased WarrantsPurchased	0	shares
CY2016	wfc	Weighted Average Contractual Yield On Available For Sale Debt Securities WeightedAverageContractualYieldOnAvailableForSaleDebtSecurities	0.0344
CY2017	wfc	Weighted Average Contractual Yield On Available For Sale Debt Securities WeightedAverageContractualYieldOnAvailableForSaleDebtSecurities	0.0372
CY2016	wfc	Weighted Average Contractual Yield On Available For Sale Debt Securities Expected To Mature After Five And Through Ten Years WeightedAverageContractualYieldOnAvailableForSaleDebtSecuritiesExpectedToMatureAfterFiveAndThroughTenYears	0.0317
CY2017	wfc	Weighted Average Contractual Yield On Available For Sale Debt Securities Expected To Mature After Five And Through Ten Years WeightedAverageContractualYieldOnAvailableForSaleDebtSecuritiesExpectedToMatureAfterFiveAndThroughTenYears	0.0324
CY2016	wfc	Weighted Average Contractual Yield On Available For Sale Debt Securities Expected To Mature After One And Through Five Years WeightedAverageContractualYieldOnAvailableForSaleDebtSecuritiesExpectedToMatureAfterOneAndThroughFiveYears	0.0220
CY2017	wfc	Weighted Average Contractual Yield On Available For Sale Debt Securities Expected To Mature After One And Through Five Years WeightedAverageContractualYieldOnAvailableForSaleDebtSecuritiesExpectedToMatureAfterOneAndThroughFiveYears	0.0311
CY2016	wfc	Weighted Average Contractual Yield On Available For Sale Debt Securities Expected To Mature After Ten Years WeightedAverageContractualYieldOnAvailableForSaleDebtSecuritiesExpectedToMatureAfterTenYears	0.0372
CY2017	wfc	Weighted Average Contractual Yield On Available For Sale Debt Securities Expected To Mature After Ten Years WeightedAverageContractualYieldOnAvailableForSaleDebtSecuritiesExpectedToMatureAfterTenYears	0.0383
CY2016	wfc	Weighted Average Contractual Yield On Available For Sale Debt Securities Expected To Mature Within One Year WeightedAverageContractualYieldOnAvailableForSaleDebtSecuritiesExpectedToMatureWithinOneYear	0.0193
CY2017	wfc	Weighted Average Contractual Yield On Available For Sale Debt Securities Expected To Mature Within One Year WeightedAverageContractualYieldOnAvailableForSaleDebtSecuritiesExpectedToMatureWithinOneYear	0.0370
CY2015	wfc	Weighted Average Rate Reduction Related To Loan Modifications WeightedAverageRateReductionRelatedToLoanModifications	0.0377
CY2016	wfc	Weighted Average Rate Reduction Related To Loan Modifications WeightedAverageRateReductionRelatedToLoanModifications	0.0413
CY2017	wfc	Weighted Average Rate Reduction Related To Loan Modifications WeightedAverageRateReductionRelatedToLoanModifications	0.0592
CY2017	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-indent:24px;font-size:9pt;"><font style="font-family:Georgia,serif;font-size:9pt;">Our accounting and reporting policies conform with U.S. generally accepted accounting principles (GAAP) and practices in the financial services industry. To prepare the financial statements in conformity with GAAP, management must make estimates based on assumptions about future economic and market conditions (for example, unemployment, market liquidity, real estate prices, etc.) that affect the reported amounts of assets and liabilities at the date of the financial statements, income and expenses during the reporting period and the related disclosures. Although our estimates contemplate current conditions and how we expect them to change in the future, it is reasonably possible that actual conditions could be worse than anticipated in those estimates, which could materially affect our results of operations and financial condition. Management has made significant estimates in several areas, including:</font></div><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:9pt;padding-left:0px;"><font style="font-family:Georgia,serif;font-size:9pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;font-size:9pt;"><font style="font-family:Georgia,serif;font-size:9pt;">allowance for credit losses (Note 6 (Loans and Allowance for Credit Losses)); </font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:9pt;padding-left:0px;"><font style="font-family:Georgia,serif;font-size:9pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;font-size:9pt;"><font style="font-family:Georgia,serif;font-size:9pt;">valuations of residential mortgage servicing rights (MSRs) (Note 8 (Securitizations and Variable Interest Entities) and Note 9 (Mortgage Banking Activities)) and financial instruments (Note 17 (Fair Values of Assets and Liabilities));</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:9pt;padding-left:0px;"><font style="font-family:Georgia,serif;font-size:9pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;font-size:9pt;"><font style="font-family:Georgia,serif;font-size:9pt;">income taxes (Note 22 (Income Taxes)); and</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:9pt;padding-left:0px;"><font style="font-family:Georgia,serif;font-size:9pt;">•</font></div></td><td style="vertical-align:top;padding-left:24px;" rowspan="1" colspan="1"><div style="line-height:120%;font-size:9pt;text-indent:-24px;"><font style="font-family:Georgia,serif;font-size:9pt;">liabilities for contingent litigation losses (Note 15 (Legal Actions)).</font></div></td></tr></table><div style="line-height:120%;font-size:9pt;"><font style="font-family:Georgia,serif;font-size:9pt;"><br clear="none"/></font></div><div style="line-height:120%;font-size:9pt;"><font style="font-family:Georgia,serif;font-size:9pt;">Actual results could differ from those estimates.</font></div></div>

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2017 Q4 Form 8-K Financial Statement

#000007297119000225 Filed on February 26, 2019

Income Statement

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$WFC WELLS FARGO & COMPANY/MN Stock $wfc

2017 Q4 Form 8-K Financial Statement

#000007297119000225 Filed on February 26, 2019

Income Statement

Balance Sheet

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Facts In Submission

Files In Submission

$WFC
WELLS FARGO & COMPANY/MN Stock $wfc