$C
CITIGROUP INC Stock $c

$c Overview Financials Valuation SEC Filings Company Website

2021 Q1 Form 10-Q Financial Statement

#000083100121000066 Filed on May 06, 2021

Income Statement

Concept	2021 Q1	2020 Q1
Revenue	$19.67B	$20.96B
YoY Change	-6.15%	12.81%
Cost Of Revenue	$52.00M	$6.960B
YoY Change	-99.25%	251.52%
Gross Profit	$19.62B	$14.00B
YoY Change	40.15%	-15.67%
Gross Profit Margin	99.74%	66.79%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development	$1.852B	$1.723B
YoY Change	7.49%	0.17%
% of Gross Profit	9.44%	12.31%
Depreciation & Amortization	$962.0M	$927.0M
YoY Change	3.78%	-0.43%
% of Gross Profit	4.9%	6.62%
Operating Expenses	$1.852B	$1.723B
YoY Change	7.49%	0.17%
Operating Profit	$17.76B	$12.27B
YoY Change	44.73%	-17.5%
Interest Expense	$2.028B	$5.647B
YoY Change	-64.09%	-22.82%
% of Operating Profit	11.42%	46.01%
Other Income/Expense, Net	$285.0M	-$274.0M
YoY Change	-204.01%	-317.46%
Pretax Income	$10.31B	$3.128B
YoY Change	229.57%	-47.97%
Income Tax	$2.332B	$580.0M
% Of Pretax Income	22.62%	18.54%
Net Earnings	$7.942B	$2.536B
YoY Change	213.17%	-46.16%
Net Earnings / Revenue	40.38%	12.1%
Basic Earnings Per Share	$3.64	$1.06
Diluted Earnings Per Share	$3.62	$1.06
COMMON SHARES
Basic Shares Outstanding	2.082B shares	2.098B shares
Diluted Shares Outstanding	2.097B shares	2.114B shares

Balance Sheet

Concept	2021 Q1	2020 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$324.7B	$285.9B
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	$2.900B
YoY Change
Goodwill	$21.91B	$21.26B
YoY Change	3.01%	-3.51%
Intangibles	$4.741B	$4.560B
YoY Change	3.97%	-12.24%
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$2291B	$2220B
YoY Change	3.21%	13.35%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$60.91B	$74.37B
YoY Change	-18.1%	18.69%
Accrued Expenses	$3.100B
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$32.09B	$54.95B
YoY Change	-41.61%	39.75%
Long-Term Debt Due	$37.00M
YoY Change
Total Short-Term Liabilities	$64.04B	$74.37B
YoY Change	-13.88%	11.4%
LONG-TERM LIABILITIES
Long-Term Debt	$245.4B	$266.1B
YoY Change	-7.78%	14.17%
Other Long-Term Liabilities	$238.4B	$224.1B
YoY Change	6.37%	17.33%
Total Long-Term Liabilities	$483.8B	$490.2B
YoY Change	-1.31%	15.6%
TOTAL LIABILITIES
Total Short-Term Liabilities	$64.04B	$74.37B
Total Long-Term Liabilities	$483.8B	$490.2B
Total Liabilities	$2111B	$2027B
YoY Change	4.15%	15.07%
SHAREHOLDERS EQUITY
Retained Earnings	$174.8B	$163.4B
YoY Change	6.96%	5.54%
Common Stock	$31.00M	$31.00M
YoY Change	0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$65.26B	$64.15B
YoY Change	1.74%	34.03%
Treasury Stock Shares	1.033B shares	1.018B shares
Shareholders Equity	$202.5B	$192.3B
YoY Change
Total Liabilities & Shareholders Equity	$2314B	$2220B
YoY Change	4.26%	13.35%

Cashflow Statement

Concept	2021 Q1	2020 Q1
OPERATING ACTIVITIES
Net Income	$7.942B	$2.536B
YoY Change	213.17%	-46.16%
Depreciation, Depletion And Amortization	$962.0M	$927.0M
YoY Change	3.78%	-0.43%
Cash From Operating Activities	$23.20B	-$25.53B
YoY Change	-190.85%	-32.12%
INVESTING ACTIVITIES
Capital Expenditures	$830.0M	$460.0M
YoY Change	80.43%	-11.2%
Acquisitions
YoY Change
Other Investing Activities	-$7.000M	-$18.00M
YoY Change	-61.11%	-52.63%
Cash From Investing Activities	-$40.93B	-$72.86B
YoY Change	-43.82%	-554.14%
FINANCING ACTIVITIES
Cash Dividend Paid	$1.356B	$1.365B
YoY Change	-0.66%	3.41%
Common Stock Issuance & Retirement, Net	$1.481B	$2.925B
YoY Change	-49.37%	-27.87%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$33.26B	$191.4B
YoY Change	-82.62%	384.0%
NET CHANGE
Cash From Operating Activities	$23.20B	-$25.53B
Cash From Investing Activities	-$40.93B	-$72.86B
Cash From Financing Activities	$33.26B	$191.4B
Net Change In Cash	$15.07B	$92.00B
YoY Change	-83.62%	417.21%
FREE CASH FLOW
Cash From Operating Activities	$23.20B	-$25.53B
Capital Expenditures	$830.0M	$460.0M
Free Cash Flow	$22.37B	-$25.99B
YoY Change	-186.05%	-31.84%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2021Q1	dei	Amendment Flag AmendmentFlag	false
CY2021Q1	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021Q1	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q1
CY2019	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201613Member
CY2019	us-gaap	Change In Accounting Principle Type Extensible List ChangeInAccountingPrincipleTypeExtensibleList	us-gaap:ChangeInAccountingPrincipleMember
CY2021Q1	dei	Document Type DocumentType	10-Q
CY2021Q1	dei	Document Quarterly Report DocumentQuarterlyReport	true
CY2021Q1	dei	Document Period End Date DocumentPeriodEndDate	2021-03-31
CY2021Q1	dei	Document Transition Report DocumentTransitionReport	false
CY2021Q1	dei	Entity File Number EntityFileNumber	1-9924
CY2021Q1	dei	Entity Registrant Name EntityRegistrantName	Citigroup Inc
CY2021Q1	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021Q1	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	52-1568099
CY2021Q1	dei	Entity Address Address Line1 EntityAddressAddressLine1	388 Greenwich Street,
CY2021Q1	dei	Entity Address City Or Town EntityAddressCityOrTown	New York
CY2021Q1	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
CY2021Q1	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	10013
CY2021Q1	dei	City Area Code CityAreaCode	212
CY2021Q1	dei	Local Phone Number LocalPhoneNumber	559-1000
CY2021Q1	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021Q1	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021Q1	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2021Q1	dei	Entity Small Business EntitySmallBusiness	false
CY2021Q1	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021Q1	dei	Entity Shell Company EntityShellCompany	false
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CY2020Q4	c	Investments Excluding Trading Securities InvestmentsExcludingTradingSecurities	447359000000	USD
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CY2021Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	21638000000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	24956000000	USD
CY2021Q1	us-gaap	Notes Receivable Net NotesReceivableNet	644350000000	USD
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CY2021Q1	us-gaap	Goodwill Goodwill	21905000000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	22162000000	USD
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CY2020Q4	c	Mortgage Servicing Rights Msr Gross Carrying Amount MortgageServicingRightsMSRGrossCarryingAmount	336000000	USD
CY2021Q1	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	4741000000	USD
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CY2021Q1	us-gaap	Assets Assets	2314266000000	USD
CY2020Q4	us-gaap	Assets Assets	2260090000000	USD
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CY2021Q1	us-gaap	Noninterest Bearing Deposit Liabilities Foreign NoninterestBearingDepositLiabilitiesForeign	101662000000	USD
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CY2020Q4	us-gaap	Interest Bearing Deposit Liabilities Foreign InterestBearingDepositLiabilitiesForeign	549973000000	USD
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CY2020Q4	us-gaap	Deposits Deposits	1280671000000	USD
CY2021Q1	us-gaap	Carrying Value Of Federal Funds Purchased Securities Sold Under Agreements To Repurchase And Deposits Received For Securities Loaned CarryingValueOfFederalFundsPurchasedSecuritiesSoldUnderAgreementsToRepurchaseAndDepositsReceivedForSecuritiesLoaned	219168000000	USD
CY2020Q4	us-gaap	Carrying Value Of Federal Funds Purchased Securities Sold Under Agreements To Repurchase And Deposits Received For Securities Loaned CarryingValueOfFederalFundsPurchasedSecuritiesSoldUnderAgreementsToRepurchaseAndDepositsReceivedForSecuritiesLoaned	199525000000	USD
CY2021Q1	c	Brokerage Payables BrokeragePayables	60907000000	USD
CY2020Q4	c	Brokerage Payables BrokeragePayables	50484000000	USD
CY2021Q1	us-gaap	Trading Liabilities TradingLiabilities	179117000000	USD
CY2020Q4	us-gaap	Trading Liabilities TradingLiabilities	168027000000	USD
CY2021Q1	us-gaap	Short Term Borrowings ShortTermBorrowings	32087000000	USD
CY2020Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	29514000000	USD
CY2021Q1	us-gaap	Long Term Debt LongTermDebt	256335000000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	271686000000	USD
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CY2020Q4	us-gaap	Other Liabilities OtherLiabilities	59983000000	USD
CY2021Q1	us-gaap	Liabilities Liabilities	2110993000000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	2059890000000	USD
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1.00
CY2021Q1	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1.00
CY2021Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	30000000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	30000000	shares
CY2021Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	811200	shares
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CY2021Q1	us-gaap	Preferred Stock Value PreferredStockValue	20280000000	USD
CY2020Q4	us-gaap	Preferred Stock Value PreferredStockValue	19480000000	USD
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CY2021Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
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CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	6000000000	shares
CY2021Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	3099690888	shares
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CY2021Q1	us-gaap	Common Stock Value CommonStockValue	31000000	USD
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	31000000	USD
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CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	168272000000	USD
CY2021Q1	us-gaap	Treasury Stock Shares TreasuryStockShares	1032643369	shares
CY2021Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.51
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CY2021Q1	us-gaap	Treasury Stock Value TreasuryStockValue	65261000000	USD
CY2020Q4	us-gaap	Treasury Stock Value TreasuryStockValue	64129000000	USD
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CY2021Q1	us-gaap	Stockholders Equity StockholdersEquity	202549000000	USD
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CY2021Q1	us-gaap	Minority Interest MinorityInterest	724000000	USD
CY2020Q4	us-gaap	Minority Interest MinorityInterest	758000000	USD
CY2021Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	203273000000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	200200000000	USD
CY2021Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2314266000000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2260090000000	USD
CY2021Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	203273000000	USD
CY2020Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	193326000000	USD
CY2020Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.51
CY2021Q1	us-gaap	Profit Loss ProfitLoss	7975000000	USD
CY2020Q1	us-gaap	Profit Loss ProfitLoss	2530000000	USD
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CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	7942000000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	2536000000	USD
CY2021Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-2000000	USD
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CY2021Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	7944000000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	2554000000	USD
CY2021Q1	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	962000000	USD
CY2020Q1	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	927000000	USD
CY2021Q1	c	Financing Receivable Credit Loss Expense Reversal Including Unfunded Lending Commitments FinancingReceivableCreditLossExpenseReversalIncludingUnfundedLendingCommitments	-2105000000	USD
CY2020Q1	c	Financing Receivable Credit Loss Expense Reversal Including Unfunded Lending Commitments FinancingReceivableCreditLossExpenseReversalIncludingUnfundedLendingCommitments	6934000000	USD
CY2021Q1	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	401000000	USD
CY2020Q1	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	432000000	USD
CY2021Q1	us-gaap	Asset Impairment Charges AssetImpairmentCharges	69000000	USD
CY2020Q1	us-gaap	Asset Impairment Charges AssetImpairmentCharges	55000000	USD
CY2021Q1	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	-14405000000	USD
CY2020Q1	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	88875000000	USD
CY2021Q1	us-gaap	Increase Decrease In Trading Liabilities IncreaseDecreaseInTradingLiabilities	11090000000	USD
CY2020Q1	us-gaap	Increase Decrease In Trading Liabilities IncreaseDecreaseInTradingLiabilities	44101000000	USD
CY2021Q1	us-gaap	Increase Decrease In Broker Dealer Related Receivables Payables Net IncreaseDecreaseInBrokerDealerRelatedReceivablesPayablesNet	5236000000	USD
CY2020Q1	us-gaap	Increase Decrease In Broker Dealer Related Receivables Payables Net IncreaseDecreaseInBrokerDealerRelatedReceivablesPayablesNet	2931000000	USD
CY2021Q1	us-gaap	Increase Decrease In Loans Held For Sale IncreaseDecreaseInLoansHeldForSale	-1561000000	USD
CY2020Q1	us-gaap	Increase Decrease In Loans Held For Sale IncreaseDecreaseInLoansHeldForSale	1393000000	USD
CY2021Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	383000000	USD
CY2020Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	3123000000	USD
CY2021Q1	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	3047000000	USD
CY2020Q1	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	1605000000	USD
CY2021Q1	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	7755000000	USD
CY2020Q1	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-15045000000	USD
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CY2020Q1	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	-28087000000	USD
CY2021Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	23198000000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-25533000000	USD
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CY2020Q1	us-gaap	Payments For Proceeds From Other Loans And Leases PaymentsForProceedsFromOtherLoansAndLeases	26743000000	USD
CY2021Q1	us-gaap	Proceeds From Sale Of Loans And Leases Held For Investment ProceedsFromSaleOfLoansAndLeasesHeldForInvestment	323000000	USD
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CY2020Q1	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	108658000000	USD
CY2021Q1	us-gaap	Proceeds From Sale Of Other Investments ProceedsFromSaleOfOtherInvestments	46049000000	USD
CY2020Q1	us-gaap	Proceeds From Sale Of Other Investments ProceedsFromSaleOfOtherInvestments	44399000000	USD
CY2021Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Other Investments ProceedsFromMaturitiesPrepaymentsAndCallsOfOtherInvestments	35088000000	USD
CY2020Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Other Investments ProceedsFromMaturitiesPrepaymentsAndCallsOfOtherInvestments	29203000000	USD
CY2021Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	830000000	USD
CY2020Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	460000000	USD
CY2021Q1	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	10000000	USD
CY2020Q1	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	2000000	USD
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CY2020Q1	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-18000000	USD
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CY2020Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-72857000000	USD
CY2021Q1	us-gaap	Payments Of Dividends PaymentsOfDividends	1356000000	USD
CY2020Q1	us-gaap	Payments Of Dividends PaymentsOfDividends	1365000000	USD
CY2021Q1	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	2300000000	USD
CY2020Q1	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	1500000000	USD
CY2021Q1	us-gaap	Payments For Repurchase Of Preferred Stock And Preference Stock PaymentsForRepurchaseOfPreferredStockAndPreferenceStock	1500000000	USD
CY2020Q1	us-gaap	Payments For Repurchase Of Preferred Stock And Preference Stock PaymentsForRepurchaseOfPreferredStockAndPreferenceStock	1500000000	USD
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CY2020Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2925000000	USD
CY2021Q1	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	312000000	USD
CY2020Q1	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	406000000	USD
CY2021Q1	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	19643000000	USD
CY2020Q1	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	55985000000	USD
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CY2020Q1	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	13081000000	USD
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CY2020Q1	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	114321000000	USD
CY2021Q1	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	2573000000	USD
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CY2020Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	191358000000	USD
CY2021Q1	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-452000000	USD
CY2020Q1	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-967000000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	15067000000	USD
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CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	309615000000	USD
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CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	324682000000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	285920000000	USD
CY2021Q1	us-gaap	Cash And Due From Banks CashAndDueFromBanks	26204000000	USD
CY2020Q1	us-gaap	Cash And Due From Banks CashAndDueFromBanks	23755000000	USD
CY2021Q1	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	298478000000	USD
CY2020Q1	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	262165000000	USD
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CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	285920000000	USD
CY2021Q1	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	950000000	USD
CY2020Q1	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1441000000	USD
CY2021Q1	us-gaap	Interest Paid Net InterestPaidNet	1729000000	USD
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CY2021Q1	us-gaap	Financing Receivable Reclassification To Held For Sale FinancingReceivableReclassificationToHeldForSale	636000000	USD
CY2020Q1	us-gaap	Financing Receivable Reclassification To Held For Sale FinancingReceivableReclassificationToHeldForSale	224000000	USD
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CY2021Q1	us-gaap	Revenues Revenues	19327000000	USD
CY2020Q1	us-gaap	Revenues Revenues	20731000000	USD
CY2021Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2332000000	USD
CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	580000000	USD
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CY2021Q1	us-gaap	Assets Assets	2314000000000	USD
CY2020Q4	us-gaap	Assets Assets	2260000000000	USD
CY2021Q1	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	8909000000	USD
CY2020Q1	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	11250000000	USD
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CY2020Q1	us-gaap	Interest Income Federal Funds Sold And Securities Purchased Under Agreements To Resell InterestIncomeFederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	1208000000	USD
CY2021Q1	c	Interest And Dividend Income Securities Excluding Trading Securities InterestAndDividendIncomeSecuritiesExcludingTradingSecurities	1752000000	USD
CY2020Q1	c	Interest And Dividend Income Securities Excluding Trading Securities InterestAndDividendIncomeSecuritiesExcludingTradingSecurities	2281000000	USD
CY2021Q1	us-gaap	Interest Income Debt Securities Trading Operating InterestIncomeDebtSecuritiesTradingOperating	1337000000	USD
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CY2021Q1	us-gaap	Interest Expense Deposits InterestExpenseDeposits	1052000000	USD
CY2020Q1	us-gaap	Interest Expense Deposits InterestExpenseDeposits	2614000000	USD
CY2021Q1	us-gaap	Interest Expense Federal Funds Purchased And Securities Sold Under Agreements To Repurchase InterestExpenseFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	253000000	USD
CY2020Q1	us-gaap	Interest Expense Federal Funds Purchased And Securities Sold Under Agreements To Repurchase InterestExpenseFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	1085000000	USD
CY2021Q1	us-gaap	Interest Expense Trading Liabilities InterestExpenseTradingLiabilities	114000000	USD
CY2020Q1	us-gaap	Interest Expense Trading Liabilities InterestExpenseTradingLiabilities	239000000	USD
CY2021Q1	us-gaap	Interest Expense Short Term Borrowings Excluding Federal Funds And Securities Sold Under Agreements To Repurchase InterestExpenseShortTermBorrowingsExcludingFederalFundsAndSecuritiesSoldUnderAgreementsToRepurchase	31000000	USD
CY2020Q1	us-gaap	Interest Expense Short Term Borrowings Excluding Federal Funds And Securities Sold Under Agreements To Repurchase InterestExpenseShortTermBorrowingsExcludingFederalFundsAndSecuritiesSoldUnderAgreementsToRepurchase	384000000	USD
CY2021Q1	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	918000000	USD
CY2020Q1	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	1325000000	USD
CY2021Q1	us-gaap	Interest Expense InterestExpense	2368000000	USD
CY2020Q1	us-gaap	Interest Expense InterestExpense	5647000000	USD
CY2021Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	10166000000	USD
CY2020Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	11492000000	USD
CY2021Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-1479000000	USD
CY2020Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	6377000000	USD
CY2021Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	11645000000	USD
CY2020Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	5115000000	USD
CY2021Q1	c	Insurance Fees And Charges InsuranceFeesAndCharges	340000000	USD
CY2020Q1	c	Insurance Fees And Charges InsuranceFeesAndCharges	225000000	USD
CY2021Q1	c	Commissions And Fees CommissionsAndFees	3670000000	USD
CY2021Q1	c	Income Loss Available To Common Stockholders IncomeLossAvailableToCommonStockholders	7650000000	USD
CY2020Q1	c	Commissions And Fees CommissionsAndFees	3021000000	USD
CY2021Q1	us-gaap	Principal Transactions Revenue PrincipalTransactionsRevenue	3913000000	USD
CY2020Q1	us-gaap	Principal Transactions Revenue PrincipalTransactionsRevenue	5261000000	USD
CY2021Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	7977000000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	2548000000	USD
CY2021Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	33000000	USD
CY2020Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-6000000	USD
CY2021Q1	c	Income Loss From Continuing Operation After Noncontrolling Interest IncomeLossFromContinuingOperationAfterNoncontrollingInterest	7944000000	USD
CY2020Q1	c	Income Loss From Continuing Operation After Noncontrolling Interest IncomeLossFromContinuingOperationAfterNoncontrollingInterest	2554000000	USD
CY2021Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-2000000	USD
CY2020Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-18000000	USD
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	7942000000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	2536000000	USD
CY2021Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	292000000	USD
CY2020Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	291000000	USD
CY2020Q1	c	Income Loss Available To Common Stockholders IncomeLossAvailableToCommonStockholders	2245000000	USD
CY2021Q1	c	Income Allocated To Employee Restricted And Deferred Shares That Contain Nonforfeitable Rights To Dividends IncomeAllocatedToEmployeeRestrictedAndDeferredSharesThatContainNonforfeitableRightsToDividends	66000000	USD
CY2020Q1	c	Income Allocated To Employee Restricted And Deferred Shares That Contain Nonforfeitable Rights To Dividends IncomeAllocatedToEmployeeRestrictedAndDeferredSharesThatContainNonforfeitableRightsToDividends	21000000	USD
CY2021Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	7584000000	USD
CY2020Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2224000000	USD
CY2021Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2082000000.0	shares
CY2020Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2097900000	shares
CY2021Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	3.64
CY2020Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.07
CY2021Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2020Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.01
CY2021Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.64
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.06
CY2021Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	7584000000	USD
CY2020Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2224000000	USD
CY2021Q1	c	Dividends Allocatedto Employee Restricted And Deferred Shares That Contain Forfeitable Rightsto Dividends DividendsAllocatedtoEmployeeRestrictedAndDeferredSharesThatContainForfeitableRightstoDividends	7000000	USD
CY2020Q1	c	Dividends Allocatedto Employee Restricted And Deferred Shares That Contain Forfeitable Rightsto Dividends DividendsAllocatedtoEmployeeRestrictedAndDeferredSharesThatContainForfeitableRightstoDividends	7000000	USD
CY2021Q1	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	7591000000	USD
CY2020Q1	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	2231000000	USD
CY2021Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2082000000.0	shares
CY2020Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2097900000	shares
CY2021Q1	us-gaap	Incremental Common Shares Attributable To Written Put Options IncrementalCommonSharesAttributableToWrittenPutOptions	100000	shares
CY2020Q1	us-gaap	Incremental Common Shares Attributable To Written Put Options IncrementalCommonSharesAttributableToWrittenPutOptions	100000	shares
CY2021Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	14500000	shares
CY2020Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	15700000	shares
CY2021Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2096600000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2113700000	shares
CY2021Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	3.62
CY2020Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.06
CY2021Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2020Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.01
CY2021Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.62
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.06
CY2021Q1	us-gaap	Schedule Of Resale Agreements ScheduleOfResaleAgreements	<div style="text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Securities borrowed and purchased under agreements to resell</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, at their respective carrying values, consisted of the following:</span></div><div style="margin-bottom:5pt;margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;vertical-align:top;width:100.000%"><tr><td style="width:1.0%"/><td style="width:50.388%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:23.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:22.710%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-style:italic;font-weight:400;line-height:100%">In millions of dollars</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">March 31,<br/>2021</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">December 31, 2020</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Securities purchased under agreements to resell</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">220,276</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">204,655 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Deposits paid for securities borrowed</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">94,801</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">90,067 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">Total, net</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:5.85pt;font-weight:700;line-height:100%;position:relative;top:-3.15pt;vertical-align:baseline">(1)</span></div></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">315,077</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">294,722 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Allowance for credit losses on securities purchased and borrowed</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:5.85pt;font-weight:400;line-height:100%;position:relative;top:-3.15pt;vertical-align:baseline">(2)</span></div></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">(5)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(10)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">Total, net of allowance</span></td><td style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">315,072</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">294,712 </span></td><td style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div>
CY2021Q1	us-gaap	Securities Purchased Under Agreements To Resell SecuritiesPurchasedUnderAgreementsToResell	220276000000	USD
CY2020Q4	us-gaap	Securities Purchased Under Agreements To Resell SecuritiesPurchasedUnderAgreementsToResell	204655000000	USD
CY2021Q1	c	Deposits Paid For Securities Borrowed At Carrying Value Before Allowance For Credit Loss DepositsPaidForSecuritiesBorrowedAtCarryingValueBeforeAllowanceForCreditLoss	94801000000	USD
CY2020Q4	c	Deposits Paid For Securities Borrowed At Carrying Value Before Allowance For Credit Loss DepositsPaidForSecuritiesBorrowedAtCarryingValueBeforeAllowanceForCreditLoss	90067000000	USD
CY2021Q1	c	Carrying Value Of Federal Funds Sold Securities Purchased Under Agreements To Resell And Deposits Paid For Securities Borrowed Before Allowance For Credit Loss CarryingValueOfFederalFundsSoldSecuritiesPurchasedUnderAgreementsToResellAndDepositsPaidForSecuritiesBorrowedBeforeAllowanceForCreditLoss	315077000000	USD
CY2020Q4	c	Carrying Value Of Federal Funds Sold Securities Purchased Under Agreements To Resell And Deposits Paid For Securities Borrowed Before Allowance For Credit Loss CarryingValueOfFederalFundsSoldSecuritiesPurchasedUnderAgreementsToResellAndDepositsPaidForSecuritiesBorrowedBeforeAllowanceForCreditLoss	294722000000	USD
CY2021Q1	c	Carrying Value Of Federal Funds Sold Securities Purchased Under Agreements To Resell And Deposits Paid For Securities Borrowed Allowance For Credit Loss CarryingValueOfFederalFundsSoldSecuritiesPurchasedUnderAgreementsToResellAndDepositsPaidForSecuritiesBorrowedAllowanceForCreditLoss	5000000	USD
CY2020Q4	c	Carrying Value Of Federal Funds Sold Securities Purchased Under Agreements To Resell And Deposits Paid For Securities Borrowed Allowance For Credit Loss CarryingValueOfFederalFundsSoldSecuritiesPurchasedUnderAgreementsToResellAndDepositsPaidForSecuritiesBorrowedAllowanceForCreditLoss	10000000	USD
CY2021Q1	us-gaap	Carrying Value Of Federal Funds Sold Securities Purchased Under Agreements To Resell And Deposits Paid For Securities Borrowed CarryingValueOfFederalFundsSoldSecuritiesPurchasedUnderAgreementsToResellAndDepositsPaidForSecuritiesBorrowed	315072000000	USD
CY2020Q4	us-gaap	Carrying Value Of Federal Funds Sold Securities Purchased Under Agreements To Resell And Deposits Paid For Securities Borrowed CarryingValueOfFederalFundsSoldSecuritiesPurchasedUnderAgreementsToResellAndDepositsPaidForSecuritiesBorrowed	294712000000	USD
CY2021Q1	us-gaap	Schedule Of Repurchase Agreements ScheduleOfRepurchaseAgreements	<div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Securities loaned and sold under agreements to repurchase</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, at their respective carrying values, consisted of the following:</span></div><div><table style="border-collapse:collapse;display:inline-table;vertical-align:top;width:100.000%"><tr><td style="width:1.0%"/><td style="width:48.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:23.304%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:24.794%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-style:italic;font-weight:400;line-height:100%">In millions of dollars</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">March 31,<br/>2021</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">December 31, 2020</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Securities sold under agreements to repurchase</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">198,029</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">181,194 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Deposits received for securities loaned</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">21,139</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">18,331 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">Total, net</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:5.85pt;font-weight:700;line-height:100%;position:relative;top:-3.15pt;vertical-align:baseline">(1)</span></div></td><td style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">219,168</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">199,525 </span></td><td style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><div style="padding-left:18pt;text-indent:-18pt"><span><br/></span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:120%">(1) The above tables do not include securities-for-securities lending transactions of $2.7 billion and $6.8 billion at March 31, 2021 and December 31, 2020, respectively, where the Company acts as lender and receives securities that can be sold or pledged as collateral. In these transactions, the Company recognizes the securities received at fair value within </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-style:italic;font-weight:400;line-height:120%">Other assets</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:120%"> and the obligation to return those securities as a liability within </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-style:italic;font-weight:400;line-height:120%">Brokerage payables</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:120%">.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:120%">(2) See Note 14 to the Consolidated Financial Statements for further information.</span></div>
CY2021Q1	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	198029000000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	181194000000	USD
CY2021Q1	us-gaap	Deposits Received For Securities Loaned At Carrying Value DepositsReceivedForSecuritiesLoanedAtCarryingValue	21139000000	USD
CY2020Q4	us-gaap	Deposits Received For Securities Loaned At Carrying Value DepositsReceivedForSecuritiesLoanedAtCarryingValue	18331000000	USD
CY2021Q1	us-gaap	Carrying Value Of Federal Funds Purchased Securities Sold Under Agreements To Repurchase And Deposits Received For Securities Loaned CarryingValueOfFederalFundsPurchasedSecuritiesSoldUnderAgreementsToRepurchaseAndDepositsReceivedForSecuritiesLoaned	219168000000	USD
CY2020Q4	us-gaap	Carrying Value Of Federal Funds Purchased Securities Sold Under Agreements To Repurchase And Deposits Received For Securities Loaned CarryingValueOfFederalFundsPurchasedSecuritiesSoldUnderAgreementsToRepurchaseAndDepositsReceivedForSecuritiesLoaned	199525000000	USD
CY2021Q1	us-gaap	Securities Received As Collateral SecuritiesReceivedAsCollateral	2700000000	USD
CY2020Q4	us-gaap	Securities Received As Collateral SecuritiesReceivedAsCollateral	6800000000	USD
CY2021Q1	us-gaap	Securities Purchased Under Agreements To Resell Gross SecuritiesPurchasedUnderAgreementsToResellGross	336164000000	USD
CY2021Q1	us-gaap	Securities Purchased Under Agreements To Resell Liability SecuritiesPurchasedUnderAgreementsToResellLiability	115888000000	USD
CY2021Q1	us-gaap	Securities Purchased Under Agreements To Resell SecuritiesPurchasedUnderAgreementsToResell	220276000000	USD
CY2021Q1	us-gaap	Securities Purchased Under Agreements To Resell Collateral Obligation To Return Securities SecuritiesPurchasedUnderAgreementsToResellCollateralObligationToReturnSecurities	184850000000	USD
CY2021Q1	us-gaap	Securities Purchased Under Agreements To Resell Amount Offset Against Collateral SecuritiesPurchasedUnderAgreementsToResellAmountOffsetAgainstCollateral	35426000000	USD
CY2021Q1	us-gaap	Securities Borrowed Gross SecuritiesBorrowedGross	106008000000	USD
CY2021Q1	us-gaap	Securities Borrowed Liability SecuritiesBorrowedLiability	11207000000	USD
CY2021Q1	us-gaap	Deposits Paid For Securities Borrowed At Carrying Value DepositsPaidForSecuritiesBorrowedAtCarryingValue	94801000000	USD
CY2021Q1	us-gaap	Securities Borrowed Collateral Obligation To Return Securities SecuritiesBorrowedCollateralObligationToReturnSecurities	20754000000	USD
CY2021Q1	us-gaap	Securities Borrowed Amount Offset Against Collateral SecuritiesBorrowedAmountOffsetAgainstCollateral	74047000000	USD
CY2021Q1	c	Securities Purchased Under Agreements To Resell Securities Borrowed Gross SecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedGross	442172000000	USD
CY2021Q1	c	Securities Purchased Under Agreements To Resell Securities Borrowed Liability SecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedLiability	127095000000	USD
CY2021Q1	us-gaap	Carrying Value Of Securities Purchased Under Agreements To Resell And Deposits Paid For Securities Borrowed CarryingValueOfSecuritiesPurchasedUnderAgreementsToResellAndDepositsPaidForSecuritiesBorrowed	315077000000	USD
CY2021Q1	c	Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Securities SecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnSecurities	205604000000	USD
CY2021Q1	c	Securities Purchased Under Agreements To Resell Securities Borrowed Amount Offset Against Collateral SecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedAmountOffsetAgainstCollateral	109473000000	USD
CY2021Q1	us-gaap	Securities Sold Under Agreements To Repurchase Gross SecuritiesSoldUnderAgreementsToRepurchaseGross	313917000000	USD
CY2021Q1	us-gaap	Securities Sold Under Agreements To Repurchase Asset SecuritiesSoldUnderAgreementsToRepurchaseAsset	115888000000	USD
CY2021Q1	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	198029000000	USD
CY2021Q1	us-gaap	Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Securities SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities	102256000000	USD
CY2021Q1	us-gaap	Securities Sold Under Agreements To Repurchase Amount Offset Against Collateral SecuritiesSoldUnderAgreementsToRepurchaseAmountOffsetAgainstCollateral	95773000000	USD
CY2021Q1	us-gaap	Securities Loaned Gross SecuritiesLoanedGross	32346000000	USD
CY2021Q1	us-gaap	Securities Loaned Asset SecuritiesLoanedAsset	11207000000	USD
CY2021Q1	us-gaap	Deposits Received For Securities Loaned At Carrying Value DepositsReceivedForSecuritiesLoanedAtCarryingValue	21139000000	USD
CY2021Q1	us-gaap	Securities Loaned Collateral Right To Reclaim Securities SecuritiesLoanedCollateralRightToReclaimSecurities	11085000000	USD
CY2021Q1	us-gaap	Securities Loaned Amount Offset Against Collateral SecuritiesLoanedAmountOffsetAgainstCollateral	10054000000	USD
CY2021Q1	c	Securities Sold Under Agreements To Resell Securities Loaned Gross SecuritiesSoldUnderAgreementsToResellSecuritiesLoanedGross	346263000000	USD
CY2021Q1	c	Securities Sold Under Agreements To Resell Securities Loaned Asset SecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAsset	127095000000	USD
CY2021Q1	us-gaap	Carrying Value Of Securities Sold Under Repurchase Agreements And Deposits Received For Securities Loaned CarryingValueOfSecuritiesSoldUnderRepurchaseAgreementsAndDepositsReceivedForSecuritiesLoaned	219168000000	USD
CY2021Q1	c	Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Securities SecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimSecurities	113341000000	USD
CY2021Q1	c	Securities Sold Under Agreements To Resell Securities Loaned Amount Offset Against Collateral SecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAmountOffsetAgainstCollateral	105827000000	USD
CY2020Q4	us-gaap	Securities Purchased Under Agreements To Resell Gross SecuritiesPurchasedUnderAgreementsToResellGross	362025000000	USD
CY2020Q4	us-gaap	Securities Purchased Under Agreements To Resell Liability SecuritiesPurchasedUnderAgreementsToResellLiability	157370000000	USD
CY2020Q4	us-gaap	Securities Purchased Under Agreements To Resell SecuritiesPurchasedUnderAgreementsToResell	204655000000	USD
CY2020Q4	us-gaap	Securities Purchased Under Agreements To Resell Collateral Obligation To Return Securities SecuritiesPurchasedUnderAgreementsToResellCollateralObligationToReturnSecurities	159232000000	USD
CY2020Q4	us-gaap	Securities Purchased Under Agreements To Resell Amount Offset Against Collateral SecuritiesPurchasedUnderAgreementsToResellAmountOffsetAgainstCollateral	45423000000	USD
CY2020Q4	us-gaap	Securities Borrowed Gross SecuritiesBorrowedGross	96425000000	USD
CY2020Q4	us-gaap	Securities Borrowed Liability SecuritiesBorrowedLiability	6358000000	USD
CY2020Q4	us-gaap	Deposits Paid For Securities Borrowed At Carrying Value DepositsPaidForSecuritiesBorrowedAtCarryingValue	90067000000	USD
CY2020Q4	us-gaap	Securities Borrowed Collateral Obligation To Return Securities SecuritiesBorrowedCollateralObligationToReturnSecurities	13474000000	USD
CY2020Q4	us-gaap	Securities Borrowed Amount Offset Against Collateral SecuritiesBorrowedAmountOffsetAgainstCollateral	76593000000	USD
CY2020Q4	c	Securities Purchased Under Agreements To Resell Securities Borrowed Gross SecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedGross	458450000000	USD
CY2020Q4	c	Securities Purchased Under Agreements To Resell Securities Borrowed Liability SecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedLiability	163728000000	USD
CY2020Q4	us-gaap	Carrying Value Of Securities Purchased Under Agreements To Resell And Deposits Paid For Securities Borrowed CarryingValueOfSecuritiesPurchasedUnderAgreementsToResellAndDepositsPaidForSecuritiesBorrowed	294722000000	USD
CY2020Q4	c	Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Securities SecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnSecurities	172706000000	USD
CY2020Q4	c	Securities Purchased Under Agreements To Resell Securities Borrowed Amount Offset Against Collateral SecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedAmountOffsetAgainstCollateral	122016000000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase Gross SecuritiesSoldUnderAgreementsToRepurchaseGross	338564000000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase Asset SecuritiesSoldUnderAgreementsToRepurchaseAsset	157370000000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	181194000000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Securities SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities	95563000000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase Amount Offset Against Collateral SecuritiesSoldUnderAgreementsToRepurchaseAmountOffsetAgainstCollateral	85631000000	USD
CY2020Q4	us-gaap	Securities Loaned Gross SecuritiesLoanedGross	24689000000	USD
CY2020Q4	us-gaap	Securities Loaned Asset SecuritiesLoanedAsset	6358000000	USD
CY2020Q4	us-gaap	Deposits Received For Securities Loaned At Carrying Value DepositsReceivedForSecuritiesLoanedAtCarryingValue	18331000000	USD
CY2020Q4	us-gaap	Securities Loaned Collateral Right To Reclaim Securities SecuritiesLoanedCollateralRightToReclaimSecurities	7982000000	USD
CY2020Q4	us-gaap	Securities Loaned Amount Offset Against Collateral SecuritiesLoanedAmountOffsetAgainstCollateral	10349000000	USD
CY2020Q4	c	Securities Sold Under Agreements To Resell Securities Loaned Gross SecuritiesSoldUnderAgreementsToResellSecuritiesLoanedGross	363253000000	USD
CY2020Q4	c	Securities Sold Under Agreements To Resell Securities Loaned Asset SecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAsset	163728000000	USD
CY2020Q4	us-gaap	Carrying Value Of Securities Sold Under Repurchase Agreements And Deposits Received For Securities Loaned CarryingValueOfSecuritiesSoldUnderRepurchaseAgreementsAndDepositsReceivedForSecuritiesLoaned	199525000000	USD
CY2020Q4	c	Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Securities SecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimSecurities	103545000000	USD
CY2020Q4	c	Securities Sold Under Agreements To Resell Securities Loaned Amount Offset Against Collateral SecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAmountOffsetAgainstCollateral	95980000000	USD
CY2021Q1	us-gaap	Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	313917000000	USD
CY2021Q1	us-gaap	Securities Loaned Gross Including Not Subject To Master Netting Arrangement SecuritiesLoanedGrossIncludingNotSubjectToMasterNettingArrangement	32346000000	USD
CY2021Q1	us-gaap	Secured Borrowings Gross Including Not Subject To Master Netting Arrangement SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement	346263000000	USD
CY2020Q4	us-gaap	Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	338564000000	USD
CY2020Q4	us-gaap	Securities Loaned Gross Including Not Subject To Master Netting Arrangement SecuritiesLoanedGrossIncludingNotSubjectToMasterNettingArrangement	24689000000	USD
CY2020Q4	us-gaap	Secured Borrowings Gross Including Not Subject To Master Netting Arrangement SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement	363253000000	USD
CY2021Q1	us-gaap	Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	313917000000	USD
CY2021Q1	us-gaap	Securities Loaned Gross Including Not Subject To Master Netting Arrangement SecuritiesLoanedGrossIncludingNotSubjectToMasterNettingArrangement	32346000000	USD
CY2021Q1	us-gaap	Secured Borrowings Gross Including Not Subject To Master Netting Arrangement SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement	346263000000	USD
CY2020Q4	us-gaap	Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	338564000000	USD
CY2020Q4	us-gaap	Securities Loaned Gross Including Not Subject To Master Netting Arrangement SecuritiesLoanedGrossIncludingNotSubjectToMasterNettingArrangement	24689000000	USD
CY2020Q4	us-gaap	Secured Borrowings Gross Including Not Subject To Master Netting Arrangement SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement	363253000000	USD
CY2021Q1	us-gaap	Due To And From Broker Dealers And Clearing Organizations Disclosure DueToAndFromBrokerDealersAndClearingOrganizationsDisclosure	BROKERAGE RECEIVABLES AND BROKERAGE PAYABLES<div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company has receivables and payables for financial instruments sold to and purchased from brokers, dealers and customers, which arise in the ordinary course of business. </span></div><div style="text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">For additional information on these receivables and payables, see Note 12 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K.</span></div><div style="text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Brokerage receivables </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">and </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Brokerage payables</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> consisted of the following:</span></div><div style="margin-bottom:5pt;margin-top:5pt;text-align:center"><table style="border-collapse:collapse;display:inline-table;vertical-align:top;width:100.000%"><tr><td style="width:1.0%"/><td style="width:49.495%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:23.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:23.603%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-style:italic;font-weight:400;line-height:100%">In millions of dollars</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">March 31,<br/>2021</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">December 31, 2020</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Receivables from customers</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">25,661</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">18,097 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Receivables from brokers, dealers and clearing organizations</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">34,804</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">26,709 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:middle"><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">Total brokerage receivables</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:5.85pt;font-weight:700;line-height:100%;position:relative;top:-3.15pt;vertical-align:baseline">(1)</span></div></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">60,465</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">44,806 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;border-top:2pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Payables to customers</span></td><td style="background-color:#ffffff;border-top:2pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:2pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">45,065</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-top:2pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td style="background-color:#ffffff;border-top:2pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:2pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">39,319 </span></td><td style="background-color:#ffffff;border-top:2pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Payables to brokers, dealers and clearing organizations</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">15,842</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">11,165 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;border-bottom:2pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:middle"><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">Total brokerage payables</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:5.85pt;font-weight:700;line-height:100%;position:relative;top:-3.15pt;vertical-align:baseline">(1)</span></div></td><td style="background-color:#ffffff;border-bottom:2pt solid #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:2pt solid #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">60,907</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:2pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td style="background-color:#ffffff;border-bottom:2pt solid #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:2pt solid #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">50,484 </span></td><td style="background-color:#ffffff;border-bottom:2pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div>(1) Includes brokerage receivables and payables recorded by Citi broker-dealer entities that are accounted for in accordance with the AICPA Accounting Guide for Brokers and Dealers in Securities as codified in ASC 940-320.
CY2021Q1	us-gaap	Receivables From Customers ReceivablesFromCustomers	25661000000	USD
CY2020Q4	us-gaap	Receivables From Customers ReceivablesFromCustomers	18097000000	USD
CY2021Q1	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	34804000000	USD
CY2020Q4	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	26709000000	USD
CY2021Q1	c	Brokerage Receivables BrokerageReceivables	60465000000	USD
CY2020Q4	c	Brokerage Receivables BrokerageReceivables	44806000000	USD
CY2021Q1	srt	Payables To Customers PayablesToCustomers	45065000000	USD
CY2020Q4	srt	Payables To Customers PayablesToCustomers	39319000000	USD
CY2021Q1	srt	Payables To Broker Dealers And Clearing Organizations PayablesToBrokerDealersAndClearingOrganizations	15842000000	USD
CY2020Q4	srt	Payables To Broker Dealers And Clearing Organizations PayablesToBrokerDealersAndClearingOrganizations	11165000000	USD
CY2021Q1	c	Brokerage Payables BrokeragePayables	60907000000	USD
CY2020Q4	c	Brokerage Payables BrokeragePayables	50484000000	USD
CY2021Q1	c	Investments Excluding Trading Securities InvestmentsExcludingTradingSecurities	472959000000	USD
CY2020Q4	c	Investments Excluding Trading Securities InvestmentsExcludingTradingSecurities	447359000000	USD
CY2021Q1	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	1652000000	USD
CY2020Q1	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	2179000000	USD
CY2021Q1	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	66000000	USD
CY2020Q1	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	76000000	USD
CY2021Q1	us-gaap	Dividend Income Operating DividendIncomeOperating	34000000	USD
CY2020Q1	us-gaap	Dividend Income Operating DividendIncomeOperating	26000000	USD
CY2021Q1	c	Interest And Dividend Income Securities Excluding Trading Securities InterestAndDividendIncomeSecuritiesExcludingTradingSecurities	1752000000	USD
CY2020Q1	c	Interest And Dividend Income Securities Excluding Trading Securities InterestAndDividendIncomeSecuritiesExcludingTradingSecurities	2281000000	USD
CY2021Q1	c	Gross Realized Gain On Marketable Securities And Cost Method Investments Excluding Other Than Temporary Impairments And Other Investments GrossRealizedGainOnMarketableSecuritiesAndCostMethodInvestmentsExcludingOtherThanTemporaryImpairmentsAndOtherInvestments	460000000	USD
CY2020Q1	c	Gross Realized Gain On Marketable Securities And Cost Method Investments Excluding Other Than Temporary Impairments And Other Investments GrossRealizedGainOnMarketableSecuritiesAndCostMethodInvestmentsExcludingOtherThanTemporaryImpairmentsAndOtherInvestments	461000000	USD
CY2021Q1	c	Gross Realized Losson Marketable Securitiesand Cost Method Investments Excluding Otherthan Temporary Impairmentsand Other Investments GrossRealizedLossonMarketableSecuritiesandCostMethodInvestmentsExcludingOtherthanTemporaryImpairmentsandOtherInvestments	59000000	USD
CY2020Q1	c	Gross Realized Losson Marketable Securitiesand Cost Method Investments Excluding Otherthan Temporary Impairmentsand Other Investments GrossRealizedLossonMarketableSecuritiesandCostMethodInvestmentsExcludingOtherthanTemporaryImpairmentsandOtherInvestments	29000000	USD
CY2021Q1	us-gaap	Marketable Securities Realized Gain Loss Excluding Other Than Temporary Impairments MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments	401000000	USD
CY2020Q1	us-gaap	Marketable Securities Realized Gain Loss Excluding Other Than Temporary Impairments MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments	432000000	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	107883000000	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	1192000000	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	6146000000	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	240000000	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	114029000000	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	1432000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	60316000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	267000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	4760000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	208000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	65076000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	475000000	USD
CY2021Q1	c	Debt Securities Held To Maturity Net Of Allowance For Credit Losses DebtSecuritiesHeldToMaturityNetOfAllowanceForCreditLosses	161742000000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	2334000000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	1701000000	USD
CY2021Q1	c	Debt Securities Held To Maturity Fair Value Net Of Allowance For Credit Losses DebtSecuritiesHeldToMaturityFairValueNetOfAllowanceForCreditLosses	162375000000	USD
CY2020Q4	c	Debt Securities Held To Maturity Net Of Allowance For Credit Losses DebtSecuritiesHeldToMaturityNetOfAllowanceForCreditLosses	104943000000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	3022000000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	175000000	USD
CY2020Q4	c	Debt Securities Held To Maturity Fair Value Net Of Allowance For Credit Losses DebtSecuritiesHeldToMaturityFairValueNetOfAllowanceForCreditLosses	107790000000	USD
CY2021Q1	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	78000000	USD
CY2020Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	86000000	USD
CY2021Q1	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	161742000000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	162375000000	USD
CY2020Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	104943000000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	107790000000	USD
CY2021Q1	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	78000000	USD
CY2020Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	86000000	USD
CY2021Q1	c	Other Than Temporary Impairment Losses Investments With Intent Not To Sell OtherThanTemporaryImpairmentLossesInvestmentsWithIntentNotToSell	0	USD
CY2020Q1	c	Other Than Temporary Impairment Losses Investments With Intent Not To Sell OtherThanTemporaryImpairmentLossesInvestmentsWithIntentNotToSell	0	USD
CY2021Q1	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest	0	USD
CY2020Q1	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest	0	USD
CY2021Q1	c	Other Than Temporary Impairment Losses Investments Not Being Sold Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsNotBeingSoldPortionRecognizedInEarningsNet	0	USD
CY2020Q1	c	Other Than Temporary Impairment Losses Investments Not Being Sold Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsNotBeingSoldPortionRecognizedInEarningsNet	0	USD
CY2021Q1	c	Other Than Temporary Impairment Losses Investments With Intent To Sell OtherThanTemporaryImpairmentLossesInvestmentsWithIntentToSell	69000000	USD
CY2020Q1	c	Other Than Temporary Impairment Losses Investments With Intent To Sell OtherThanTemporaryImpairmentLossesInvestmentsWithIntentToSell	52000000	USD
CY2021Q1	c	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net And Equity Method Investment Other Than Temporary Impairment OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAndEquityMethodInvestmentOtherThanTemporaryImpairment	69000000	USD
CY2020Q1	c	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net And Equity Method Investment Other Than Temporary Impairment OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAndEquityMethodInvestmentOtherThanTemporaryImpairment	52000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	5000000	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Writeoff DebtSecuritiesAvailableForSaleAllowanceForCreditLossWriteoff	0	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Recovery DebtSecuritiesAvailableForSaleAllowanceForCreditLossRecovery	0	USD
CY2021Q1	c	Debt Securities Available For Sale Allowance For Credit Loss Writeoff After Recovery DebtSecuritiesAvailableForSaleAllowanceForCreditLossWriteoffAfterRecovery	0	USD
CY2021Q1	c	Debt Securities Available For Sale Allowance For Credit Loss Writeoff After Recovery DebtSecuritiesAvailableForSaleAllowanceForCreditLossWriteoffAfterRecovery	0	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Not Previously Recorded DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded	0	USD
CY2021Q1	c	Debt Securities Available For Sale Reserve Builds Releases Net DebtSecuritiesAvailableForSaleReserveBuildsReleasesNet	0	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Change In Present Value Expense Reversal DebtSecuritiesAvailableForSaleChangeInPresentValueExpenseReversal	0	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Purchased With Credit Deterioration Increase DebtSecuritiesAvailableForSaleAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease	0	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	5000000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	USD
CY2021Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	1079000000	USD
CY2020Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	962000000	USD
CY2021Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	0	USD
CY2020Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	3000000	USD
CY2021Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Downward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentAnnualAmount	0	USD
CY2020Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Downward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentAnnualAmount	0	USD
CY2021Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	81000000	USD
CY2020Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	25000000	USD
CY2021Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Cumulative Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossCumulativeAmount	68000000	USD
CY2021Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Downward Price Adjustment Cumulative Amount EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentCumulativeAmount	53000000	USD
CY2021Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Cumulative Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentCumulativeAmount	567000000	USD
CY2020Q1	c	Non Marketable Equity Securities Impairment Recognized In Earnings NonMarketableEquitySecuritiesImpairmentRecognizedInEarnings	0	USD
CY2021Q1	c	Non Marketable Equity Securities Impairment Recognized In Earnings NonMarketableEquitySecuritiesImpairmentRecognizedInEarnings	0	USD
CY2021Q1	us-gaap	Fair Value Investments Entities That Calculate Net Asset Value Per Share Unfunded Committments FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments	62000000	USD
CY2020Q4	us-gaap	Fair Value Investments Entities That Calculate Net Asset Value Per Share Unfunded Committments FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments	82000000	USD
CY2021Q1	c	Loan Categories Number LoanCategoriesNumber	2	category
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	24956000000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	12783000000	USD
CY2021Q1	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	2208000000	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	2479000000	USD
CY2021Q1	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	460000000	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	420000000	USD
CY2021Q1	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	1748000000	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	2059000000	USD
CY2021Q1	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	1748000000	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	2059000000	USD
CY2021Q1	c	Financing Receivable Reserve Buildsor Releases Net FinancingReceivableReserveBuildsorReleasesNet	-3068000000	USD
CY2020Q1	c	Financing Receivable Reserve Buildsor Releases Net FinancingReceivableReserveBuildsorReleasesNet	4094000000	USD
CY2021Q1	c	Financing Receivable Specific Reserve Buildsor Releases Net FinancingReceivableSpecificReserveBuildsorReleasesNet	-159000000	USD
CY2020Q1	c	Financing Receivable Specific Reserve Buildsor Releases Net FinancingReceivableSpecificReserveBuildsorReleasesNet	224000000	USD
CY2021Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-1479000000	USD
CY2020Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	6377000000	USD
CY2021Q1	us-gaap	Financing Receivable Allowance For Credit Loss Purchased With Credit Deterioration Increase FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease	0	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Loss Purchased With Credit Deterioration Increase FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease	4000000	USD
CY2021Q1	c	Financing Receivable Allowance For Credit Loss Adjustments Other FinancingReceivableAllowanceForCreditLossAdjustmentsOther	-91000000	USD
CY2020Q1	c	Financing Receivable Allowance For Credit Loss Adjustments Other FinancingReceivableAllowanceForCreditLossAdjustmentsOther	-483000000	USD
CY2021Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	21638000000	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	20380000000	USD
CY2020Q4	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	2655000000	USD
CY2019Q4	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	1456000000	USD
CY2021Q1	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	-626000000	USD
CY2020Q1	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	557000000	USD
CY2021Q1	c	Off Balance Sheet Credit Loss Liability Other Adjustments Net OffBalanceSheetCreditLossLiabilityOtherAdjustmentsNet	-17000000	USD
CY2020Q1	c	Off Balance Sheet Credit Loss Liability Other Adjustments Net OffBalanceSheetCreditLossLiabilityOtherAdjustmentsNet	-6000000	USD
CY2021Q1	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	2012000000	USD
CY2020Q1	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	1813000000	USD
CY2021Q1	c	Financing Receivable And Off Balance Sheet Liability Allowances For Credit Loss FinancingReceivableAndOffBalanceSheetLiabilityAllowancesForCreditLoss	23650000000	USD
CY2020Q1	c	Financing Receivable And Off Balance Sheet Liability Allowances For Credit Loss FinancingReceivableAndOffBalanceSheetLiabilityAllowancesForCreditLoss	22193000000	USD
CY2021Q1	c	Financing Receivable Allowance For Credit Loss Loans Sold FinancingReceivableAllowanceForCreditLossLoansSold	0	USD
CY2020Q1	c	Financing Receivable Allowance For Credit Loss Loans Sold FinancingReceivableAllowanceForCreditLossLoansSold	3000000	USD
CY2021Q1	us-gaap	Financing Receivable Allowance For Credit Loss Foreign Currency Translation FinancingReceivableAllowanceForCreditLossForeignCurrencyTranslation	-108000000	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Loss Foreign Currency Translation FinancingReceivableAllowanceForCreditLossForeignCurrencyTranslation	-483000000	USD
CY2021Q1	c	Financing Receivable Adjustments Miscellaneous Other FinancingReceivableAdjustmentsMiscellaneousOther	17000000	USD
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CY2021Q1	c	Credit Derivatives Notional Amount Purchased Credit Protection CreditDerivativesNotionalAmountPurchasedCreditProtection	683503000000	USD
CY2021Q1	us-gaap	Credit Derivative Maximum Exposure Undiscounted CreditDerivativeMaximumExposureUndiscounted	609231000000	USD
CY2021Q1	us-gaap	Credit Risk Derivative Assets At Fair Value CreditRiskDerivativeAssetsAtFairValue	10626000000	USD
CY2021Q1	us-gaap	Credit Risk Derivative Liabilities At Fair Value CreditRiskDerivativeLiabilitiesAtFairValue	10564000000	USD
CY2021Q1	c	Credit Derivatives Notional Amount Purchased Credit Protection CreditDerivativesNotionalAmountPurchasedCreditProtection	683503000000	USD
CY2021Q1	us-gaap	Credit Derivative Maximum Exposure Undiscounted CreditDerivativeMaximumExposureUndiscounted	609231000000	USD
CY2020Q4	us-gaap	Credit Risk Derivative Assets At Fair Value CreditRiskDerivativeAssetsAtFairValue	9789000000	USD
CY2020Q4	us-gaap	Credit Risk Derivative Liabilities At Fair Value CreditRiskDerivativeLiabilitiesAtFairValue	10129000000	USD
CY2020Q4	c	Credit Derivatives Notional Amount Purchased Credit Protection CreditDerivativesNotionalAmountPurchasedCreditProtection	612770000000	USD
CY2020Q4	us-gaap	Credit Derivative Maximum Exposure Undiscounted CreditDerivativeMaximumExposureUndiscounted	543607000000	USD
CY2020Q4	us-gaap	Credit Risk Derivative Assets At Fair Value CreditRiskDerivativeAssetsAtFairValue	9789000000	USD
CY2020Q4	us-gaap	Credit Risk Derivative Liabilities At Fair Value CreditRiskDerivativeLiabilitiesAtFairValue	10129000000	USD
CY2020Q4	c	Credit Derivatives Notional Amount Purchased Credit Protection CreditDerivativesNotionalAmountPurchasedCreditProtection	612770000000	USD
CY2020Q4	us-gaap	Credit Derivative Maximum Exposure Undiscounted CreditDerivativeMaximumExposureUndiscounted	543607000000	USD
CY2020Q4	us-gaap	Credit Risk Derivative Assets At Fair Value CreditRiskDerivativeAssetsAtFairValue	9789000000	USD
CY2020Q4	us-gaap	Credit Risk Derivative Liabilities At Fair Value CreditRiskDerivativeLiabilitiesAtFairValue	10129000000	USD
CY2020Q4	c	Credit Derivatives Notional Amount Purchased Credit Protection CreditDerivativesNotionalAmountPurchasedCreditProtection	612770000000	USD
CY2020Q4	us-gaap	Credit Derivative Maximum Exposure Undiscounted CreditDerivativeMaximumExposureUndiscounted	543607000000	USD
CY2020Q4	us-gaap	Credit Risk Derivative Assets At Fair Value CreditRiskDerivativeAssetsAtFairValue	9789000000	USD
CY2020Q4	us-gaap	Credit Risk Derivative Liabilities At Fair Value CreditRiskDerivativeLiabilitiesAtFairValue	10129000000	USD
CY2020Q4	c	Credit Derivatives Notional Amount Purchased Credit Protection CreditDerivativesNotionalAmountPurchasedCreditProtection	612770000000	USD
CY2020Q4	us-gaap	Credit Derivative Maximum Exposure Undiscounted CreditDerivativeMaximumExposureUndiscounted	543607000000	USD
CY2021Q1	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	22000000000	USD
CY2020Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	25000000000	USD
CY2021Q1	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	19000000000	USD
CY2020Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	22000000000	USD
CY2021Q1	c	Credit Derivatives Number Of Rating Agencies CreditDerivativesNumberOfRatingAgencies	3	agency
CY2021Q1	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	1000000000	USD
CY2021Q1	c	Derivative Collateral Obligation To Return Cash Portion To Be Segregated DerivativeCollateralObligationToReturnCashPortionToBeSegregated	1000000000	USD
CY2021Q1	c	Credit Derivative Aggregate Cash Obligations And Collateral Requirements CreditDerivativeAggregateCashObligationsAndCollateralRequirements	2000000000	USD
CY2021Q1	c	Counterparty Derivative Credit Risk Valuation Adjustment Derivative Assets CounterpartyDerivativeCreditRiskValuationAdjustmentDerivativeAssets	642000000	USD
CY2020Q4	c	Counterparty Derivative Credit Risk Valuation Adjustment Derivative Assets CounterpartyDerivativeCreditRiskValuationAdjustmentDerivativeAssets	800000000	USD
CY2021Q1	c	Derivative Funding Valuation Adjustment Derivative Assets DerivativeFundingValuationAdjustmentDerivativeAssets	449000000	USD
CY2020Q4	c	Derivative Funding Valuation Adjustment Derivative Assets DerivativeFundingValuationAdjustmentDerivativeAssets	525000000	USD
CY2021Q1	us-gaap	Derivative Credit Risk Valuation Adjustment Derivative Liabilities DerivativeCreditRiskValuationAdjustmentDerivativeLiabilities	376000000	USD
CY2020Q4	us-gaap	Derivative Credit Risk Valuation Adjustment Derivative Liabilities DerivativeCreditRiskValuationAdjustmentDerivativeLiabilities	403000000	USD
CY2021Q1	c	Derivative Funding Valuation Adjustment Derivative Liabilities DerivativeFundingValuationAdjustmentDerivativeLiabilities	91000000	USD
CY2020Q4	c	Derivative Funding Valuation Adjustment Derivative Liabilities DerivativeFundingValuationAdjustmentDerivativeLiabilities	67000000	USD
CY2021Q1	us-gaap	Derivative Credit Risk Valuation Adjustment Derivative Assets DerivativeCreditRiskValuationAdjustmentDerivativeAssets	624000000	USD
CY2020Q4	us-gaap	Derivative Credit Risk Valuation Adjustment Derivative Assets DerivativeCreditRiskValuationAdjustmentDerivativeAssets	855000000	USD
CY2021Q1	c	Counterparty Derivative Credit Risk Valuation Adjustment Gain Loss CounterpartyDerivativeCreditRiskValuationAdjustmentGainLoss	9000000	USD
CY2020Q1	c	Counterparty Derivative Credit Risk Valuation Adjustment Gain Loss CounterpartyDerivativeCreditRiskValuationAdjustmentGainLoss	-283000000	USD
CY2021Q1	c	Derivative Funding Valuation Adjustment Gain Losson Derivative Asset DerivativeFundingValuationAdjustmentGainLossonDerivativeAsset	69000000	USD
CY2020Q1	c	Derivative Funding Valuation Adjustment Gain Losson Derivative Asset DerivativeFundingValuationAdjustmentGainLossonDerivativeAsset	-1053000000	USD
CY2021Q1	c	Derivative Credit Risk Valuation Adjustment Gain Loss DerivativeCreditRiskValuationAdjustmentGainLoss	-37000000	USD
CY2020Q1	c	Derivative Credit Risk Valuation Adjustment Gain Loss DerivativeCreditRiskValuationAdjustmentGainLoss	533000000	USD
CY2021Q1	c	Derivative Funding Valuation Adjustment Gain Losson Derivative Liability DerivativeFundingValuationAdjustmentGainLossonDerivativeLiability	24000000	USD
CY2020Q1	c	Derivative Funding Valuation Adjustment Gain Losson Derivative Liability DerivativeFundingValuationAdjustmentGainLossonDerivativeLiability	337000000	USD
CY2021Q1	c	Derivative Funding Valuation Adjustment Gain Loss Net DerivativeFundingValuationAdjustmentGainLossNet	65000000	USD
CY2020Q1	c	Derivative Funding Valuation Adjustment Gain Loss Net DerivativeFundingValuationAdjustmentGainLossNet	-466000000	USD
CY2021Q1	c	Derivative Debt Valuation Adjustment Gain Losson Fair Value Option Liability DerivativeDebtValuationAdjustmentGainLossonFairValueOptionLiability	-38000000	USD
CY2020Q1	c	Derivative Debt Valuation Adjustment Gain Losson Fair Value Option Liability DerivativeDebtValuationAdjustmentGainLossonFairValueOptionLiability	4188000000	USD
CY2021Q1	c	Certain Structured Liabilities CertainStructuredLiabilities	59000000000.0	USD
CY2020Q4	c	Certain Structured Liabilities CertainStructuredLiabilities	48500000000	USD
CY2021Q1	c	Fair Value Option Loans Held As Assets Nonaccrual Status Or90 Days Or More Past Due FairValueOptionLoansHeldAsAssetsNonaccrualStatusOr90DaysOrMorePastDue	0	USD
CY2020Q4	c	Fair Value Option Loans Held As Assets Nonaccrual Status Or90 Days Or More Past Due FairValueOptionLoansHeldAsAssetsNonaccrualStatusOr90DaysOrMorePastDue	0	USD
CY2021Q1	c	Fair Value Option Loans Held As Assets Aggregate Amount In Nonaccrual Status Or90 Days Or More Past Due FairValueOptionLoansHeldAsAssetsAggregateAmountInNonaccrualStatusOr90DaysOrMorePastDue	0	USD
CY2020Q4	c	Fair Value Option Loans Held As Assets Aggregate Amount In Nonaccrual Status Or90 Days Or More Past Due FairValueOptionLoansHeldAsAssetsAggregateAmountInNonaccrualStatusOr90DaysOrMorePastDue	0	USD
CY2021Q1	c	Derivative Creditand Debt Valuation Adjustment Gain Loss DerivativeCreditandDebtValuationAdjustmentGainLoss	27000000	USD
CY2020Q1	c	Derivative Creditand Debt Valuation Adjustment Gain Loss DerivativeCreditandDebtValuationAdjustmentGainLoss	3722000000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionAfterTax	-38000000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionAfterTax	4188000000	USD
CY2021Q1	c	Guarantee Obligations Maximum Exposure Expire Within One Year GuaranteeObligationsMaximumExposureExpireWithinOneYear	270600000000	USD
CY2021Q1	c	Guarantee Obligations Maximum Exposure Expire After One Year GuaranteeObligationsMaximumExposureExpireAfterOneYear	159300000000	USD
CY2021Q1	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	429900000000	USD
CY2021Q1	us-gaap	Guarantee Obligations Current Carrying Value GuaranteeObligationsCurrentCarryingValue	1695000000	USD
CY2020Q4	c	Guarantee Obligations Maximum Exposure Expire Within One Year GuaranteeObligationsMaximumExposureExpireWithinOneYear	266900000000	USD
CY2020Q4	c	Guarantee Obligations Maximum Exposure Expire After One Year GuaranteeObligationsMaximumExposureExpireAfterOneYear	174600000000	USD
CY2020Q4	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	441500000000	USD
CY2020Q4	us-gaap	Guarantee Obligations Current Carrying Value GuaranteeObligationsCurrentCarryingValue	2204000000	USD
CY2021Q1	c	Number Of Trust Funded By Reinsurer NumberOfTrustFundedByReinsurer	2	trust
CY2021Q1	c	Number Of Trust Funded By Reinsurer NumberOfTrustFundedByReinsurer	2	trust
CY2021Q1	c	Long Term Care Insurance Indemnification Liability LongTermCareInsuranceIndemnificationLiability	0	USD
CY2020Q4	c	Long Term Care Insurance Indemnification Liability LongTermCareInsuranceIndemnificationLiability	0	USD
CY2021Q1	c	Cash Initial Margin Collected And Remitted Amount CashInitialMarginCollectedAndRemittedAmount	16800000000	USD
CY2020Q4	c	Cash Initial Margin Collected And Remitted Amount CashInitialMarginCollectedAndRemittedAmount	16600000000	USD
CY2021Q1	us-gaap	Guarantee Obligations Current Carrying Value GuaranteeObligationsCurrentCarryingValue	1700000000	USD
CY2020Q4	us-gaap	Guarantee Obligations Current Carrying Value GuaranteeObligationsCurrentCarryingValue	2200000000	USD
CY2021Q1	c	Cash Held As Collateral CashHeldAsCollateral	60500000000	USD
CY2020Q4	c	Cash Held As Collateral CashHeldAsCollateral	51600000000	USD
CY2021Q1	c	Securitiesand Other Marketable Assets Heldas Collateral SecuritiesandOtherMarketableAssetsHeldasCollateral	92200000000	USD
CY2020Q4	c	Securitiesand Other Marketable Assets Heldas Collateral SecuritiesandOtherMarketableAssetsHeldasCollateral	80100000000	USD
CY2021Q1	c	Letters Of Credit Received As Collateral LettersOfCreditReceivedAsCollateral	4900000000	USD
CY2020Q4	c	Letters Of Credit Received As Collateral LettersOfCreditReceivedAsCollateral	6600000000	USD
CY2021Q1	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	429900000000	USD
CY2020Q4	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	441500000000	USD
CY2021Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	2900000000	USD
CY2021Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	3100000000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	2800000000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	3100000000	USD
CY2021Q1	c	Credit Commitments CreditCommitments	1095453000000	USD
CY2020Q4	c	Credit Commitments CreditCommitments	1071288000000	USD
CY2021Q1	c	Securities Purchasedunder Agreementsto Resell Securities Loaned Gross Unsettled SecuritiesPurchasedunderAgreementstoResellSecuritiesLoanedGrossUnsettled	117800000000	USD
CY2020Q4	c	Securities Purchasedunder Agreementsto Resell Securities Loaned Gross Unsettled SecuritiesPurchasedunderAgreementstoResellSecuritiesLoanedGrossUnsettled	71800000000	USD
CY2021Q1	c	Securities Soldunder Agreementsto Resell Securities Loaned Gross Unsettled SecuritiesSoldunderAgreementstoResellSecuritiesLoanedGrossUnsettled	72900000000	USD
CY2020Q4	c	Securities Soldunder Agreementsto Resell Securities Loaned Gross Unsettled SecuritiesSoldunderAgreementstoResellSecuritiesLoanedGrossUnsettled	62500000000	USD
CY2021Q1	us-gaap	Restricted Cash RestrictedCash	15890000000	USD
CY2020Q4	us-gaap	Restricted Cash RestrictedCash	17977000000	USD
CY2021Q1	us-gaap	Loss Contingency Range Of Possible Loss Portion Not Accrued LossContingencyRangeOfPossibleLossPortionNotAccrued	1400000000	USD
CY2021Q1	c	Dividend Income Operating From Affiliates Subsidiaries And Holding Companies DividendIncomeOperatingFromAffiliatesSubsidiariesAndHoldingCompanies	0	USD
CY2021Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	12534000000	USD
CY2021Q1	c	Interest Income Intercompany InterestIncomeIntercompany	0	USD
CY2021Q1	us-gaap	Interest Expense InterestExpense	2368000000	USD
CY2021Q1	c	Interest Expense Intercompany InterestExpenseIntercompany	0	USD
CY2021Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	10166000000	USD
CY2021Q1	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	3670000000	USD
CY2021Q1	c	Investment Banking Advisory Brokerageand Underwriting Feesand Commissions Intercompany InvestmentBankingAdvisoryBrokerageandUnderwritingFeesandCommissionsIntercompany	0	USD
CY2021Q1	us-gaap	Principal Transactions Revenue PrincipalTransactionsRevenue	3913000000	USD
CY2021Q1	c	Principal Transactions Revenue Intercompany Net PrincipalTransactionsRevenueIntercompanyNet	0	USD
CY2021Q1	c	Noninterest Income Excluding Commissions And Fees And Principal Transactions NoninterestIncomeExcludingCommissionsAndFeesAndPrincipalTransactions	1578000000	USD
CY2021Q1	c	Other Income Intercompany OtherIncomeIntercompany	0	USD
CY2021Q1	us-gaap	Noninterest Income NoninterestIncome	9161000000	USD
CY2021Q1	us-gaap	Revenues Revenues	19327000000	USD
CY2021Q1	c	Provision For Credit Loss Benefits And Claims Expense Reversal ProvisionForCreditLossBenefitsAndClaimsExpenseReversal	-2055000000	USD
CY2021Q1	us-gaap	Labor And Related Expense LaborAndRelatedExpense	6001000000	USD
CY2021Q1	c	Labor And Related Expenses Intercompany LaborAndRelatedExpensesIntercompany	0	USD
CY2021Q1	c	Operating Expenses Excluding Labor And Related Expense OperatingExpensesExcludingLaborAndRelatedExpense	5072000000	USD
CY2021Q1	c	Other Noninterest Expense Intercompany OtherNoninterestExpenseIntercompany	0	USD
CY2021Q1	us-gaap	Noninterest Expense NoninterestExpense	11073000000	USD
CY2021Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2021Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	10309000000	USD
CY2021Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2332000000	USD
CY2021Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	7977000000	USD
CY2021Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-2000000	USD
CY2021Q1	us-gaap	Profit Loss ProfitLoss	7975000000	USD
CY2021Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	33000000	USD
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	7942000000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2953000000	USD
CY2021Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	4989000000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	-58000000	USD
CY2021Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	33000000	USD
CY2021Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	4964000000	USD
CY2020Q1	c	Dividend Income Operating From Affiliates Subsidiaries And Holding Companies DividendIncomeOperatingFromAffiliatesSubsidiariesAndHoldingCompanies	0	USD
CY2020Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	17139000000	USD
CY2020Q1	c	Interest Income Intercompany InterestIncomeIntercompany	0	USD
CY2020Q1	us-gaap	Interest Expense InterestExpense	5647000000	USD
CY2020Q1	c	Interest Expense Intercompany InterestExpenseIntercompany	0	USD
CY2020Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	11492000000	USD
CY2020Q1	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	3021000000	USD
CY2020Q1	c	Investment Banking Advisory Brokerageand Underwriting Feesand Commissions Intercompany InvestmentBankingAdvisoryBrokerageandUnderwritingFeesandCommissionsIntercompany	0	USD
CY2020Q1	us-gaap	Principal Transactions Revenue PrincipalTransactionsRevenue	5261000000	USD
CY2020Q1	c	Principal Transactions Revenue Intercompany Net PrincipalTransactionsRevenueIntercompanyNet	0	USD
CY2020Q1	c	Noninterest Income Excluding Commissions And Fees And Principal Transactions NoninterestIncomeExcludingCommissionsAndFeesAndPrincipalTransactions	957000000	USD
CY2020Q1	c	Other Income Intercompany OtherIncomeIntercompany	0	USD
CY2020Q1	us-gaap	Noninterest Income NoninterestIncome	9239000000	USD
CY2020Q1	us-gaap	Revenues Revenues	20731000000	USD
CY2020Q1	c	Provision For Credit Loss Benefits And Claims Expense Reversal ProvisionForCreditLossBenefitsAndClaimsExpenseReversal	6960000000	USD
CY2020Q1	us-gaap	Labor And Related Expense LaborAndRelatedExpense	5654000000	USD
CY2020Q1	c	Labor And Related Expenses Intercompany LaborAndRelatedExpensesIntercompany	0	USD
CY2020Q1	c	Operating Expenses Excluding Labor And Related Expense OperatingExpensesExcludingLaborAndRelatedExpense	4989000000	USD
CY2020Q1	c	Other Noninterest Expense Intercompany OtherNoninterestExpenseIntercompany	0	USD
CY2020Q1	us-gaap	Noninterest Expense NoninterestExpense	10643000000	USD
CY2020Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3128000000	USD
CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	580000000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	2548000000	USD
CY2020Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-18000000	USD
CY2020Q1	us-gaap	Profit Loss ProfitLoss	2530000000	USD
CY2020Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-6000000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	2536000000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3797000000	USD
CY2020Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	6333000000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	-51000000	USD
CY2020Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-6000000	USD
CY2020Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	6276000000	USD
CY2021Q1	c	Cash And Due From Banks Excluding Intercompany Activity CashAndDueFromBanksExcludingIntercompanyActivity	26204000000	USD
CY2021Q1	c	Cash And Due From Banks Intercompany CashAndDueFromBanksIntercompany	0	USD
CY2021Q1	c	Interestbearing Depositsin Banksand Other Financial Institutions Excluding Intercompany Activity InterestbearingDepositsinBanksandOtherFinancialInstitutionsExcludingIntercompanyActivity	298478000000	USD
CY2021Q1	c	Interestbearing Depositsin Banksand Other Financial Institutions Intercompany InterestbearingDepositsinBanksandOtherFinancialInstitutionsIntercompany	0	USD
CY2021Q1	us-gaap	Carrying Value Of Federal Funds Sold Securities Purchased Under Agreements To Resell And Deposits Paid For Securities Borrowed CarryingValueOfFederalFundsSoldSecuritiesPurchasedUnderAgreementsToResellAndDepositsPaidForSecuritiesBorrowed	315072000000	USD
CY2021Q1	c	Carrying Value Of Federal Funds Sold Securities Purchased Under Agreements To Resell And Deposits Paid For Securities Borrowed Intercompany CarryingValueOfFederalFundsSoldSecuritiesPurchasedUnderAgreementsToResellAndDepositsPaidForSecuritiesBorrowedIntercompany	0	USD
CY2021Q1	us-gaap	Trading Securities TradingSecurities	360659000000	USD
CY2021Q1	c	Trading Securities Intercompany TradingSecuritiesIntercompany	0	USD
CY2021Q1	c	Investments Excluding Trading Securities InvestmentsExcludingTradingSecurities	472959000000	USD
CY2021Q1	us-gaap	Notes Receivable Gross NotesReceivableGross	665988000000	USD
CY2021Q1	c	Financing Receivable Netof Deferred Income Intercompany FinancingReceivableNetofDeferredIncomeIntercompany	0	USD
CY2021Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	21638000000	USD
CY2021Q1	us-gaap	Notes Receivable Net NotesReceivableNet	644350000000	USD
CY2021Q1	c	Advances To Subsidiaries AdvancesToSubsidiaries	0	USD
CY2021Q1	c	Investments In Subsidiaries InvestmentsInSubsidiaries	0	USD
CY2021Q1	c	Other Assets Including Brokerage Receivables Goodwill Intangible Assets Mortgage Servicing Rights And Other Assets OtherAssetsIncludingBrokerageReceivablesGoodwillIntangibleAssetsMortgageServicingRightsAndOtherAssets	196544000000	USD
CY2021Q1	c	Other Assets Intercompany OtherAssetsIntercompany	0	USD
CY2021Q1	us-gaap	Assets Assets	2314266000000	USD
CY2021Q1	us-gaap	Deposits Deposits	1300975000000	USD
CY2021Q1	c	Deposits Intercompany DepositsIntercompany	0	USD
CY2021Q1	us-gaap	Carrying Value Of Federal Funds Purchased Securities Sold Under Agreements To Repurchase And Deposits Received For Securities Loaned CarryingValueOfFederalFundsPurchasedSecuritiesSoldUnderAgreementsToRepurchaseAndDepositsReceivedForSecuritiesLoaned	219168000000	USD
CY2021Q1	c	Carrying Value Of Federal Funds Purchased Securities Sold Under Agreements To Repurchase And Deposits Received For Securities Loaned Intercompany CarryingValueOfFederalFundsPurchasedSecuritiesSoldUnderAgreementsToRepurchaseAndDepositsReceivedForSecuritiesLoanedIntercompany	0	USD
CY2021Q1	us-gaap	Trading Liabilities TradingLiabilities	179117000000	USD
CY2021Q1	c	Trading Liabilities Intercompany TradingLiabilitiesIntercompany	0	USD
CY2021Q1	us-gaap	Short Term Borrowings ShortTermBorrowings	32087000000	USD
CY2021Q1	c	Short Term Debt Intercompany ShortTermDebtIntercompany	0	USD
CY2021Q1	us-gaap	Long Term Debt LongTermDebt	256335000000	USD
CY2021Q1	c	Long Term Debt Intercompany LongTermDebtIntercompany	0	USD
CY2021Q1	c	Advances From Subsidiaries AdvancesFromSubsidiaries	0	USD
CY2021Q1	c	Brokerage Payables And Other Liabilities BrokeragePayablesAndOtherLiabilities	123311000000	USD
CY2021Q1	c	Other Liabilities Intercompany OtherLiabilitiesIntercompany	0	USD
CY2021Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	203273000000	USD
CY2021Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2314266000000	USD
CY2020Q4	c	Cash And Due From Banks Excluding Intercompany Activity CashAndDueFromBanksExcludingIntercompanyActivity	26349000000	USD
CY2020Q4	c	Cash And Due From Banks Intercompany CashAndDueFromBanksIntercompany	0	USD
CY2020Q4	c	Interestbearing Depositsin Banksand Other Financial Institutions Excluding Intercompany Activity InterestbearingDepositsinBanksandOtherFinancialInstitutionsExcludingIntercompanyActivity	283266000000	USD
CY2020Q4	c	Interestbearing Depositsin Banksand Other Financial Institutions Intercompany InterestbearingDepositsinBanksandOtherFinancialInstitutionsIntercompany	0	USD
CY2020Q4	us-gaap	Carrying Value Of Federal Funds Sold Securities Purchased Under Agreements To Resell And Deposits Paid For Securities Borrowed CarryingValueOfFederalFundsSoldSecuritiesPurchasedUnderAgreementsToResellAndDepositsPaidForSecuritiesBorrowed	294712000000	USD
CY2020Q4	c	Carrying Value Of Federal Funds Sold Securities Purchased Under Agreements To Resell And Deposits Paid For Securities Borrowed Intercompany CarryingValueOfFederalFundsSoldSecuritiesPurchasedUnderAgreementsToResellAndDepositsPaidForSecuritiesBorrowedIntercompany	0	USD
CY2020Q4	us-gaap	Trading Securities TradingSecurities	375079000000	USD
CY2020Q4	c	Trading Securities Intercompany TradingSecuritiesIntercompany	0	USD
CY2020Q4	c	Investments Excluding Trading Securities InvestmentsExcludingTradingSecurities	447359000000	USD
CY2020Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	675883000000	USD
CY2020Q4	c	Financing Receivable Netof Deferred Income Intercompany FinancingReceivableNetofDeferredIncomeIntercompany	0	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	24956000000	USD
CY2020Q4	us-gaap	Notes Receivable Net NotesReceivableNet	650927000000	USD
CY2020Q4	c	Advances To Subsidiaries AdvancesToSubsidiaries	0	USD
CY2020Q4	c	Investments In Subsidiaries InvestmentsInSubsidiaries	0	USD
CY2020Q4	c	Other Assets Including Brokerage Receivables Goodwill Intangible Assets Mortgage Servicing Rights And Other Assets OtherAssetsIncludingBrokerageReceivablesGoodwillIntangibleAssetsMortgageServicingRightsAndOtherAssets	182398000000	USD
CY2020Q4	c	Other Assets Intercompany OtherAssetsIntercompany	0	USD
CY2020Q4	us-gaap	Assets Assets	2260090000000	USD
CY2020Q4	us-gaap	Deposits Deposits	1280671000000	USD
CY2020Q4	c	Deposits Intercompany DepositsIntercompany	0	USD
CY2020Q4	us-gaap	Carrying Value Of Federal Funds Purchased Securities Sold Under Agreements To Repurchase And Deposits Received For Securities Loaned CarryingValueOfFederalFundsPurchasedSecuritiesSoldUnderAgreementsToRepurchaseAndDepositsReceivedForSecuritiesLoaned	199525000000	USD
CY2020Q4	c	Carrying Value Of Federal Funds Purchased Securities Sold Under Agreements To Repurchase And Deposits Received For Securities Loaned Intercompany CarryingValueOfFederalFundsPurchasedSecuritiesSoldUnderAgreementsToRepurchaseAndDepositsReceivedForSecuritiesLoanedIntercompany	0	USD
CY2020Q4	us-gaap	Trading Liabilities TradingLiabilities	168027000000	USD
CY2020Q4	c	Trading Liabilities Intercompany TradingLiabilitiesIntercompany	0	USD
CY2020Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	29514000000	USD
CY2020Q4	c	Short Term Debt Intercompany ShortTermDebtIntercompany	0	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	271686000000	USD
CY2020Q4	c	Long Term Debt Intercompany LongTermDebtIntercompany	0	USD
CY2020Q4	c	Advances From Subsidiaries AdvancesFromSubsidiaries	0	USD
CY2020Q4	c	Brokerage Payables And Other Liabilities BrokeragePayablesAndOtherLiabilities	110467000000	USD
CY2021Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	23198000000	USD
CY2020Q4	c	Other Liabilities Intercompany OtherLiabilitiesIntercompany	0	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	200200000000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2260090000000	USD
CY2021Q1	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	111187000000	USD
CY2021Q1	us-gaap	Proceeds From Sale Of Other Investments ProceedsFromSaleOfOtherInvestments	46049000000	USD
CY2021Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Other Investments ProceedsFromMaturitiesPrepaymentsAndCallsOfOtherInvestments	35088000000	USD
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CY2021Q1	c	Proceeds From Repayments Of Short Term Debt Intercompany ProceedsFromRepaymentsOfShortTermDebtIntercompany	0	USD
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CY2021Q1	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-452000000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	15067000000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	309615000000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	324682000000	USD
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CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	324682000000	USD
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CY2021Q1	us-gaap	Interest Paid Net InterestPaidNet	1729000000	USD
CY2021Q1	us-gaap	Financing Receivable Reclassification To Held For Sale FinancingReceivableReclassificationToHeldForSale	636000000	USD
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CY2020Q1	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	108658000000	USD
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CY2020Q1	c	Proceeds From Payments To Acquire Investments And Advances Intercompany ProceedsFromPaymentsToAcquireInvestmentsAndAdvancesIntercompany	0	USD
CY2020Q1	c	Paymentsfor Proceedsfrom Other Investing Activities Including Capital Expenditures Proceeds From Ppe PaymentsforProceedsfromOtherInvestingActivitiesIncludingCapitalExpendituresProceedsFromPPE	440000000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-72857000000	USD
CY2020Q1	us-gaap	Payments Of Dividends PaymentsOfDividends	1365000000	USD
CY2020Q1	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	1500000000	USD
CY2020Q1	c	Proceeds From Repayments Of Short Term Debt Intercompany ProceedsFromRepaymentsOfShortTermDebtIntercompany	0	USD
CY2020Q1	us-gaap	Payments For Repurchase Of Preferred Stock And Preference Stock PaymentsForRepurchaseOfPreferredStockAndPreferenceStock	1500000000	USD
CY2020Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2925000000	USD
CY2020Q1	us-gaap	Proceeds From Repayments Of Long Term Debt And Capital Securities ProceedsFromRepaymentsOfLongTermDebtAndCapitalSecurities	15846000000	USD
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CY2020Q1	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	114321000000	USD
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CY2020Q1	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-406000000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	191358000000	USD
CY2020Q1	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-967000000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	92001000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	193919000000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	285920000000	USD
CY2020Q1	us-gaap	Cash And Due From Banks CashAndDueFromBanks	23755000000	USD
CY2020Q1	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	262165000000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	285920000000	USD
CY2020Q1	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1441000000	USD
CY2020Q1	us-gaap	Interest Paid Net InterestPaidNet	5424000000	USD
CY2020Q1	us-gaap	Financing Receivable Reclassification To Held For Sale FinancingReceivableReclassificationToHeldForSale	224000000	USD

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$C
CITIGROUP INC Stock $c

2021 Q1 Form 10-Q Financial Statement

#000083100121000066 Filed on May 06, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$C CITIGROUP INC Stock $c

2021 Q1 Form 10-Q Financial Statement

#000083100121000066 Filed on May 06, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$C
CITIGROUP INC Stock $c