$DFS
Discover Financial Services Stock $dfs

$dfs Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-Q Financial Statement

#000139361221000043 Filed on October 28, 2021

Income Statement

Concept	2021 Q4	2021 Q3	2020 Q3
Revenue		$2.674B	$2.681B
YoY Change		-0.26%	-11.81%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development		$121.0M	$111.0M
YoY Change		9.01%	15.63%
% of Gross Profit
Depreciation & Amortization	$144.0M	$139.0M	$116.0M
YoY Change	17.07%	19.83%	2.65%
% of Gross Profit
Operating Expenses		$121.0M	$111.0M
YoY Change		9.01%	15.63%
Operating Profit
YoY Change
Interest Expense		$269.0M	$416.0M
YoY Change		-35.34%	-34.8%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$1.361B	$1.402B	$959.0M
YoY Change	34.09%	46.19%	-3.52%
Income Tax	$294.0M	$311.0M	$188.0M
% Of Pretax Income	21.6%	22.18%	19.6%
Net Earnings	$1.067B	$1.091B	$771.0M
YoY Change	33.54%	41.5%	0.13%
Net Earnings / Revenue		40.8%	28.76%
Basic Earnings Per Share		$3.54	$2.45
Diluted Earnings Per Share	$3.667M	$3.54	$2.45
COMMON SHARES
Basic Shares Outstanding	293.1M shares	298.0M shares	306.0M shares
Diluted Shares Outstanding		298.0M shares	306.0M shares

Balance Sheet

Concept	2021 Q4	2021 Q3	2020 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$15.65B	$20.73B	$30.37B
YoY Change	-33.32%	-31.74%	81.58%
Cash & Equivalents	$8.750B	$12.72B	$9.513B
Short-Term Investments	$6.904B	$8.014B	$20.85B
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$983.0M	$987.0M	$1.121B
YoY Change	-4.28%	-11.95%	9.05%
Goodwill	$255.0M	$255.0M	$255.0M
YoY Change	0.0%	0.0%	0.0%
Intangibles	$0.00	$1.000M	$95.00M
YoY Change	-100.0%	-98.95%	-40.25%
Long-Term Investments	$388.0M	$366.0M	$323.0M
YoY Change	9.92%	13.31%	0.62%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$110.2B	$108.5B	$124.3B
YoY Change	-2.34%	-12.71%	12.24%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$4.214B	$4.203B	$3.541B
YoY Change	9.17%	18.7%	-1.47%
Deferred Revenue
YoY Change
Short-Term Debt	$1.750B		$10.70B
YoY Change
Long-Term Debt Due	$5.185B	$0.00	$550.0M
YoY Change	22.95%	-100.0%	175.0%
Total Short-Term Liabilities	$9.399B	$4.203B	$4.091B
YoY Change	16.37%	2.74%	7.83%
LONG-TERM LIABILITIES
Long-Term Debt	$13.29B	$18.52B	$21.29B
YoY Change	-21.92%	-13.03%	-12.22%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$13.29B	$18.52B	$21.29B
YoY Change	-21.92%	-13.03%	-12.22%
TOTAL LIABILITIES
Total Short-Term Liabilities	$9.399B	$4.203B	$4.091B
Total Long-Term Liabilities	$13.29B	$18.52B	$21.29B
Total Liabilities	$96.83B	$95.28B	$114.1B
YoY Change	-5.07%	-16.49%	15.17%
SHAREHOLDERS EQUITY
Retained Earnings	$24.77B	$23.85B	$19.29B
YoY Change	24.11%	23.61%	-6.89%
Common Stock	$6.000M	$6.000M	$6.000M
YoY Change	0.0%	0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$16.70B	$15.92B	$14.43B
YoY Change	15.66%	10.34%	5.44%
Treasury Stock Shares	280.5M shares	274.0M shares	261.2M shares
Shareholders Equity	$13.41B	$13.26B	$10.25B
YoY Change
Total Liabilities & Shareholders Equity	$110.2B	$108.5B	$124.3B
YoY Change	-2.34%	-12.71%	12.24%

Cashflow Statement

Concept	2021 Q4	2021 Q3	2020 Q3
OPERATING ACTIVITIES
Net Income	$1.067B	$1.091B	$771.0M
YoY Change	33.54%	41.5%	0.13%
Depreciation, Depletion And Amortization	$144.0M	$139.0M	$116.0M
YoY Change	17.07%	19.83%	2.65%
Cash From Operating Activities	$1.342B	$1.621B	$1.296B
YoY Change	-17.82%	25.08%	58.24%
INVESTING ACTIVITIES
Capital Expenditures	-$48.00M	-$49.00M	-$53.00M
YoY Change	-12.73%	-7.55%	-13.11%
Acquisitions
YoY Change
Other Investing Activities	-$3.343B	-$1.461B	-$5.522B
YoY Change	-189.12%	-73.54%	-7.49%
Cash From Investing Activities	-$3.391B	-$1.510B	-$5.575B
YoY Change	-191.75%	-72.91%	-7.55%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	633.0M	-3.731B	-799.0M
YoY Change	-134.61%	366.96%	2563.33%
NET CHANGE
Cash From Operating Activities	1.342B	1.621B	1.296B
Cash From Investing Activities	-3.391B	-1.510B	-5.575B
Cash From Financing Activities	633.0M	-3.731B	-799.0M
Net Change In Cash	-1.416B	-3.620B	-5.078B
YoY Change	-140.46%	-28.71%	-3.11%
FREE CASH FLOW
Cash From Operating Activities	$1.342B	$1.621B	$1.296B
Capital Expenditures	-$48.00M	-$49.00M	-$53.00M
Free Cash Flow	$1.390B	$1.670B	$1.349B
YoY Change	-17.65%	23.8%	53.3%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Entity Central Index Key EntityCentralIndexKey	0001393612
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Amendment Flag AmendmentFlag	false
CY2021Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	0	USD
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2021-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	001-33378
	dei	Entity Registrant Name EntityRegistrantName	DISCOVER FINANCIAL SERVICES
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	36-2517428
	dei	Entity Address Address Line1 EntityAddressAddressLine1	2500 Lake Cook Road
	dei	Entity Address City Or Town EntityAddressCityOrTown	Riverwoods
	dei	Entity Address State Or Province EntityAddressStateOrProvince	IL
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	60015
	dei	City Area Code CityAreaCode	224
	dei	Local Phone Number LocalPhoneNumber	405-0900
	dei	Security12b Title Security12bTitle	Common Stock, par value $0.01 per share
	dei	Trading Symbol TradingSymbol	DFS
	dei	Security Exchange Name SecurityExchangeName	NYSE
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
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	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5703000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	420000000	USD
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	311000000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	188000000	USD
CY2020Q3	dfs	Loanfeeincome Loanfeeincome	100000000	USD
	dfs	Loanfeeincome Loanfeeincome	333000000	USD
	dfs	Loanfeeincome Loanfeeincome	304000000	USD
CY2021Q3	dfs	Transaction Processing Revenue TransactionProcessingRevenue	58000000	USD
CY2020Q3	dfs	Transaction Processing Revenue TransactionProcessingRevenue	50000000	USD
	dfs	Transaction Processing Revenue TransactionProcessingRevenue	167000000	USD
	dfs	Transaction Processing Revenue TransactionProcessingRevenue	143000000	USD
CY2021Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-167000000	USD
CY2020Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	0	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	562000000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	0	USD
CY2021Q3	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	0	USD
CY2020Q3	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	0	USD
	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	0	USD
	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	79000000	USD
CY2021Q3	us-gaap	Noninterest Income Other NoninterestIncomeOther	18000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1321000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	78000000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	1091000000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	771000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	4382000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	342000000	USD
CY2021Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1055000000	USD
CY2021Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	1055000000	USD
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	751000000	USD
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	751000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	4289000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	4289000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	309000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	309000000	USD
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.54
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.45
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	14.17
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.00
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.54
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.45
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	14.16
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.00
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	1091000000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	771000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	4382000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	342000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-29000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-32000000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-115000000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	208000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	0	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	3000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	2000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	4000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-29000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-29000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-113000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	212000000	USD
CY2021Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1062000000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	742000000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	4269000000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	554000000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	9643000000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	771000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-29000000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	3000000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	16000000	USD
CY2020Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.44
CY2020Q3	us-gaap	Dividends Common Stock DividendsCommonStock	137000000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	10252000000	USD
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	13171000000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	1091000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-29000000	USD
CY2021Q3	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	815000000	USD
CY2021Q3	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	2000000	USD
CY2021Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	24000000	USD
CY2021Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.50
CY2021Q3	us-gaap	Dividends Common Stock DividendsCommonStock	151000000	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	13263000000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	11859000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	342000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	212000000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	343000000	USD
	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	7000000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	22000000	USD
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	493000000	USD
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.32
	us-gaap	Dividends Common Stock DividendsCommonStock	407000000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	10252000000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	10884000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	4382000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-113000000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	1487000000	USD
	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	7000000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	81000000	USD
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.38
	us-gaap	Dividends Common Stock DividendsCommonStock	422000000	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	13263000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	4382000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	342000000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-45000000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	4603000000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	388000000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-600000000	USD
	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	387000000	USD
	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	362000000	USD
	dfs	Amortizationofdeferredrevenuesandaccretionofaccretableyieldonacquiredloans Amortizationofdeferredrevenuesandaccretionofaccretableyieldonacquiredloans	217000000	USD
	dfs	Amortizationofdeferredrevenuesandaccretionofaccretableyieldonacquiredloans Amortizationofdeferredrevenuesandaccretionofaccretableyieldonacquiredloans	245000000	USD
	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	531000000	USD
	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	40000000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	227000000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	87000000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	273000000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-212000000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	359000000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-158000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4677000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4563000000	USD
	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	94000000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Shortterm Investments ProceedsFromMaturitiesPrepaymentsAndCallsOfShorttermInvestments	2200000000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Shortterm Investments ProceedsFromMaturitiesPrepaymentsAndCallsOfShorttermInvestments	0	USD
	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	0	USD
	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	8046000000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	1709000000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	724000000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	9000000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	0	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	63000000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	34000000	USD
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	28000000	USD
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	44000000	USD
	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	255000000	USD
	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	-5316000000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	5000000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	0	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	108000000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	54000000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	146000000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	206000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	3431000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2182000000	USD
	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	1731000000	USD
	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	USD
	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	3445000000	USD
	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	2974000000	USD
	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	0	USD
	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	494000000	USD
	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	922000000	USD
	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	1754000000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	7000000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	7000000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1487000000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-4359000000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	5245000000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	343000000	USD
	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	0	USD
	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	493000000	USD
	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	474000000	USD
	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	424000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-8949000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	744000000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-841000000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	3125000000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	13589000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6964000000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	12748000000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	10089000000	USD
CY2021Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	12716000000	USD
CY2020Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	9513000000	USD
CY2021Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	32000000	USD
CY2020Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	576000000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	12748000000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	10089000000	USD
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
	us-gaap	Use Of Estimates UseOfEstimates	The preparation of financial statements in conformity with GAAP requires the Company to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and related disclosures. These estimates are based on information available as of the date of the condensed consolidated financial statements. The Company believes that the estimates used in the preparation of the condensed consolidated financial statements are reasonable. Actual results could differ from these estimates.
CY2021Q3	us-gaap	Other Short Term Investments OtherShortTermInvestments	0	USD
CY2020Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	2200000000	USD
CY2021Q3	us-gaap	Marketable Securities MarketableSecurities	8014000000	USD
CY2020Q4	us-gaap	Marketable Securities MarketableSecurities	9914000000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	7566000000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	225000000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	0	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	7791000000	USD
CY2021Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	223000000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	5000000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	1000000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	227000000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	9277000000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	377000000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	0	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	9654000000	USD
CY2020Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	260000000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	9000000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	USD
CY2020Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	269000000	USD
CY2021Q3	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	5000000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	5000000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
CY2020Q3	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	2618000000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	4758000000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	183000000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	7000000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	7566000000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	0	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	0	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	0	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	223000000	USD
CY2021Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	223000000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	2643000000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	4952000000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	188000000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	8000000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	7791000000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	0	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	0	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	0	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	227000000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	227000000	USD
CY2021Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-167000000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	562000000	USD
CY2020Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	0	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	0	USD
	dfs	Loan Portfolio Segments LoanPortfolioSegments	2	segment
	dfs	Loan Portfolio Segments LoanPortfolioSegments	2	segment
CY2021Q3	us-gaap	Notes Receivable Gross NotesReceivableGross	89542000000	USD
CY2020Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	90449000000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	6861000000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8226000000	USD
CY2021Q3	us-gaap	Notes Receivable Net NotesReceivableNet	82681000000	USD
CY2020Q4	us-gaap	Notes Receivable Net NotesReceivableNet	82223000000	USD
CY2021Q3	dfs	Revolving Lineof Credit Arrangement Convertedto Term Loanthrough Loan Modification Program Ending Balance RevolvingLineofCreditArrangementConvertedtoTermLoanthroughLoanModificationProgramEndingBalance	881000000	USD
CY2020Q4	dfs	Revolving Lineof Credit Arrangement Convertedto Term Loanthrough Loan Modification Program Ending Balance RevolvingLineofCreditArrangementConvertedtoTermLoanthroughLoanModificationProgramEndingBalance	1000000000	USD
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	7026000000	USD
CY2021Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	160000000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	556000000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	231000000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	325000000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	6861000000	USD
CY2020Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8184000000	USD
CY2020Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	710000000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	842000000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	174000000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	668000000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8226000000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8226000000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-47000000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	1991000000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	673000000	USD
	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	1318000000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	6861000000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	3383000000	USD
CY2020Q1	dfs	Cumulative Effectof Asu No.201613 Adoption CumulativeEffectofASUNo.201613Adoption	2461000000	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	5844000000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	4586000000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	2767000000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	563000000	USD
	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	2204000000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8226000000	USD
CY2021Q3	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	25000000	USD
CY2020Q3	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	40000000	USD
	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	2000000	USD
	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	17000000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	6900000000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	-165000000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	-1400000000	USD
CY2021Q3	dfs	Expected Future Peak Unemployment Rate ExpectedFuturePeakUnemploymentRate	0.061
CY2021Q3	dfs	Expected Eoy Unemployment Rate ExpectedEOYUnemploymentRate	0.055
CY2021Q3	dfs	Expected Eoy2 Unemployment Rate ExpectedEOY2UnemploymentRate	0.040
CY2021Q3	dfs	Expected Eoy Annualized Increase In Gdp ExpectedEOYAnnualizedIncreaseInGDP	0.064
CY2021Q3	dfs	Expected Eoy2 Annualized Increase In Gdp ExpectedEOY2AnnualizedIncreaseInGDP	0.035
CY2020Q4	dfs	Financing Receivable Allowancefor Credit Loss Reasonableand Supportable Forecast Period FinancingReceivableAllowanceforCreditLossReasonableandSupportableForecastPeriod	P18M
CY2020Q2	dfs	Financing Receivable Allowancefor Credit Loss Reasonableand Supportable Forecast Period FinancingReceivableAllowanceforCreditLossReasonableandSupportableForecastPeriod	P18M
CY2021Q1	dfs	Financing Receivable Allowancefor Credit Loss Reasonableand Supportable Forecast Period FinancingReceivableAllowanceforCreditLossReasonableandSupportableForecastPeriod	P18M
CY2021Q2	dfs	Financing Receivable Allowancefor Credit Loss Reasonableand Supportable Forecast Period FinancingReceivableAllowanceforCreditLossReasonableandSupportableForecastPeriod	P18M
CY2020Q3	dfs	Financing Receivable Allowancefor Credit Loss Reasonableand Supportable Forecast Period FinancingReceivableAllowanceforCreditLossReasonableandSupportableForecastPeriod	P18M
CY2021Q3	dfs	Financing Receivable Allowancefor Credit Loss Reasonableand Supportable Forecast Period FinancingReceivableAllowanceforCreditLossReasonableandSupportableForecastPeriod	P18M
CY2020Q1	dfs	Financing Receivable Allowancefor Credit Loss Reasonableand Supportable Forecast Period FinancingReceivableAllowanceforCreditLossReasonableandSupportableForecastPeriod	P12M
	dfs	Financing Receivable Allowancefor Credit Loss Reversion Period FinancingReceivableAllowanceforCreditLossReversionPeriod	P12M
	dfs	Financing Receivable Allowancefor Credit Loss Reversion Period FinancingReceivableAllowanceforCreditLossReversionPeriod	P12M
CY2021Q3	dfs	Interest And Fees Accrued Subsequently Charged Off Net Of Recoveries InterestAndFeesAccruedSubsequentlyChargedOffNetOfRecoveries	57000000	USD
CY2020Q3	dfs	Interest And Fees Accrued Subsequently Charged Off Net Of Recoveries InterestAndFeesAccruedSubsequentlyChargedOffNetOfRecoveries	114000000	USD
	dfs	Interest And Fees Accrued Subsequently Charged Off Net Of Recoveries InterestAndFeesAccruedSubsequentlyChargedOffNetOfRecoveries	232000000	USD
	dfs	Interest And Fees Accrued Subsequently Charged Off Net Of Recoveries InterestAndFeesAccruedSubsequentlyChargedOffNetOfRecoveries	393000000	USD
CY2021Q3	dfs	Fees Accrued Subsequently Charged Off Net Of Recoveries FeesAccruedSubsequentlyChargedOffNetOfRecoveries	15000000	USD
CY2020Q3	dfs	Fees Accrued Subsequently Charged Off Net Of Recoveries FeesAccruedSubsequentlyChargedOffNetOfRecoveries	27000000	USD
	dfs	Fees Accrued Subsequently Charged Off Net Of Recoveries FeesAccruedSubsequentlyChargedOffNetOfRecoveries	59000000	USD
	dfs	Fees Accrued Subsequently Charged Off Net Of Recoveries FeesAccruedSubsequentlyChargedOffNetOfRecoveries	95000000	USD
CY2021Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	479000000	USD
CY2021Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	232000000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	737000000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	243000000	USD
CY2021Q3	dfs	Percentage Of Defaulted Loans That Charged Off PercentageOfDefaultedLoansThatChargedOff	0.62
CY2020Q3	dfs	Percentage Of Defaulted Loans That Charged Off PercentageOfDefaultedLoansThatChargedOff	0.65
	dfs	Percentage Of Defaulted Loans That Charged Off PercentageOfDefaultedLoansThatChargedOff	0.66
	dfs	Percentage Of Defaulted Loans That Charged Off PercentageOfDefaultedLoansThatChargedOff	0.52
	dfs	Deposits Source Channels DepositsSourceChannels	2	channels
CY2021Q3	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	14592000000	USD
CY2020Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	19105000000	USD
CY2021Q3	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	7239000000	USD
CY2020Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	9164000000	USD
CY2021Q3	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	49295000000	USD
CY2020Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	47426000000	USD
CY2021Q3	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	71126000000	USD
CY2020Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	75695000000	USD
CY2021Q3	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	2000000000	USD
CY2020Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	2600000000	USD
CY2021Q3	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Or Less ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsOrLess	1458000000	USD
CY2021Q3	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Through Six Months ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsThroughSixMonths	1640000000	USD
CY2021Q3	us-gaap	Contractual Maturities Time Deposits100000 Or More Six Months Through12 Months ContractualMaturitiesTimeDeposits100000OrMoreSixMonthsThrough12Months	2711000000	USD
CY2021Q3	us-gaap	Contractual Maturities Time Deposits100000 Or More After12 Months ContractualMaturitiesTimeDeposits100000OrMoreAfter12Months	1430000000	USD
CY2021Q3	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	7239000000	USD
CY2021Q3	us-gaap	Time Deposit Maturities Remainder Of Fiscal Year TimeDepositMaturitiesRemainderOfFiscalYear	4171000000	USD
CY2021Q3	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	11133000000	USD
CY2021Q3	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	2663000000	USD
CY2021Q3	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	1451000000	USD
CY2021Q3	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	870000000	USD
CY2021Q3	dfs	Time Deposit Maturities After Year Four TimeDepositMaturitiesAfterYearFour	1543000000	USD
CY2021Q3	us-gaap	Time Deposits TimeDeposits	21831000000	USD
CY2021Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	18516000000	USD
CY2020Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	21241000000	USD
CY2021Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal Remainder Of Fiscal Year LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear	0	USD
CY2021Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	5188000000	USD
CY2021Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	3324000000	USD
CY2021Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	3738000000	USD
CY2021Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	529000000	USD
CY2021Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	5737000000	USD
CY2021Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	18516000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-38000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-9000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-29000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-38000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-9000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-29000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	0	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	-1000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	1000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	0	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	-1000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	1000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	0	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	0	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	0	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-42000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-10000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-32000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-42000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-10000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-32000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-4000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	-1000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-3000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	4000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	1000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	3000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-152000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-37000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-115000000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-152000000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-37000000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-115000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	0	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	-1000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	1000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-2000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	-1000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-1000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	2000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	0	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	2000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	275000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	67000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	208000000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	275000000	USD
CY2020Q3	us-gaap	Dividends Preferred Stock DividendsPreferredStock	15000000	USD
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	69000000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	67000000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	208000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-7000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	-3000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-4000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-11000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	-3000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-8000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	4000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	0	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	4000000	USD
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1402000000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	959000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	342000000	USD
CY2021Q3	us-gaap	Dividends Preferred Stock DividendsPreferredStock	30000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5703000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	420000000	USD
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	311000000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	188000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1321000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	78000000	USD
CY2021Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.222
CY2020Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.196
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.232
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.186
CY2021Q3	dfs	Changein Income Tax Expense Benefit Amount ChangeinIncomeTaxExpenseBenefitAmount	123000000	USD
	dfs	Changein Income Tax Expense Benefit Amount ChangeinIncomeTaxExpenseBenefitAmount	1200000000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	1091000000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	771000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	4382000000	USD
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	31000000	USD
CY2021Q3	dfs	Net Income Loss Available To Common Stockholders Incl Participating Securities NetIncomeLossAvailableToCommonStockholdersInclParticipatingSecurities	1061000000	USD
CY2020Q3	dfs	Net Income Loss Available To Common Stockholders Incl Participating Securities NetIncomeLossAvailableToCommonStockholdersInclParticipatingSecurities	756000000	USD
	dfs	Net Income Loss Available To Common Stockholders Incl Participating Securities NetIncomeLossAvailableToCommonStockholdersInclParticipatingSecurities	4313000000	USD
	dfs	Net Income Loss Available To Common Stockholders Incl Participating Securities NetIncomeLossAvailableToCommonStockholdersInclParticipatingSecurities	311000000	USD
CY2021Q3	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	6000000	USD
CY2020Q3	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	5000000	USD
	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	24000000	USD
	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	2000000	USD
CY2021Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1055000000	USD
CY2021Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	1055000000	USD
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	751000000	USD
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	751000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	4289000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	4289000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	309000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	309000000	USD
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	298000000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	306000000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	303000000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	307000000	shares
CY2021Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2020Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2021Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	298000000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	306000000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	303000000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	307000000	shares
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.54
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.45
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	14.17
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.00
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.54
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.45
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	14.16
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.00
CY2021Q3	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	80000000	USD
CY2021Q3	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	0	USD
CY2021Q3	dfs	Settlement Withholdings And Escrow Deposits SettlementWithholdingsAndEscrowDeposits	15000000	USD
CY2020Q4	dfs	Settlement Withholdings And Escrow Deposits SettlementWithholdingsAndEscrowDeposits	16000000	USD
CY2021Q3	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	51000000	USD
	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	54000000	USD
CY2021Q3	dfs	Derivative Number Of Terminated Instruments Associated With Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months DerivativeNumberOfTerminatedInstrumentsAssociatedWithCashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	1	transactions
CY2021Q3	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	1000000	USD
CY2021Q3	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	0	USD
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	1000000	USD
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	0	USD
CY2021Q3	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	0	USD
CY2021Q3	dfs	Derivative Collateral Rightto Reclaim Cashand Securities DerivativeCollateralRighttoReclaimCashandSecurities	0	USD
CY2020Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	0	USD
CY2020Q4	dfs	Derivative Collateral Rightto Reclaim Cashand Securities DerivativeCollateralRighttoReclaimCashandSecurities	0	USD
CY2021Q3	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	1000000	USD
CY2021Q3	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	0	USD
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	1000000	USD
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	0	USD
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
CY2021Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	2674000000	USD
CY2021Q3	us-gaap	Interest Expense InterestExpense	269000000	USD
CY2021Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	2405000000	USD
CY2021Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	185000000	USD
CY2021Q3	us-gaap	Noninterest Income NoninterestIncome	372000000	USD
CY2021Q3	us-gaap	Noninterest Expense NoninterestExpense	1190000000	USD
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1402000000	USD
CY2020Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	2681000000	USD
CY2020Q3	us-gaap	Interest Expense InterestExpense	416000000	USD
CY2020Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	2265000000	USD
CY2020Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	750000000	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	449000000	USD
CY2020Q3	us-gaap	Noninterest Expense NoninterestExpense	1005000000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	959000000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	7909000000	USD
	us-gaap	Interest Expense InterestExpense	875000000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	7034000000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-45000000	USD
	us-gaap	Noninterest Income NoninterestIncome	2117000000	USD
	us-gaap	Noninterest Expense NoninterestExpense	3493000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5703000000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	8335000000	USD
	us-gaap	Interest Expense InterestExpense	1482000000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	6853000000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	4603000000	USD
	us-gaap	Noninterest Income NoninterestIncome	1411000000	USD
	us-gaap	Noninterest Expense NoninterestExpense	3241000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	420000000	USD
CY2021Q3	dfs	Loanfeeincome Loanfeeincome	121000000	USD
CY2021Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-167000000	USD
CY2021Q3	dfs	Noninterest Incomenot Subjectto Asc606 NoninterestIncomenotSubjecttoASC606	-46000000	USD
CY2021Q3	us-gaap	Noninterest Income NoninterestIncome	372000000	USD
CY2020Q3	dfs	Loanfeeincome Loanfeeincome	100000000	USD
CY2020Q3	dfs	Noninterest Incomenot Subjectto Asc606 NoninterestIncomenotSubjecttoASC606	100000000	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	449000000	USD
	dfs	Loanfeeincome Loanfeeincome	333000000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	562000000	USD
	dfs	Noninterest Incomenot Subjectto Asc606 NoninterestIncomenotSubjecttoASC606	895000000	USD
	us-gaap	Noninterest Income NoninterestIncome	2117000000	USD
	dfs	Loanfeeincome Loanfeeincome	304000000	USD
	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	79000000	USD
	dfs	Noninterest Incomenot Subjectto Asc606 NoninterestIncomenotSubjecttoASC606	383000000	USD
	us-gaap	Noninterest Income NoninterestIncome	1411000000	USD
CY2021Q3	dfs	Customer Rewardsand Issuer Interchange CustomerRewardsandIssuerInterchange	689000000	USD
CY2020Q3	dfs	Customer Rewardsand Issuer Interchange CustomerRewardsandIssuerInterchange	514000000	USD
	dfs	Customer Rewardsand Issuer Interchange CustomerRewardsandIssuerInterchange	1800000000	USD
	dfs	Customer Rewardsand Issuer Interchange CustomerRewardsandIssuerInterchange	1400000000	USD

Files In Submission

Name	View Source	Status
0001393612-21-000043-index-headers.html	Edgar Link	pending
0001393612-21-000043-index.html	Edgar Link	pending
0001393612-21-000043.txt	Edgar Link	pending
0001393612-21-000043-xbrl.zip	Edgar Link	pending
dfs-20210930.htm	Edgar Link	pending
dfs-20210930.xsd	Edgar Link	pending
dfs-20210930_cal.xml	Edgar Link	unprocessable
dfs-20210930_def.xml	Edgar Link	unprocessable
dfs-20210930_htm.xml	Edgar Link	completed
dfs-20210930_lab.xml	Edgar Link	unprocessable
dfs-20210930_pre.xml	Edgar Link	unprocessable
dfsex3119302021.htm	Edgar Link	pending
dfsex3129302021.htm	Edgar Link	pending
dfsex319302021.htm	Edgar Link	pending
dfsex3219302021.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$DFS
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2021 Q4 Form 10-Q Financial Statement

#000139361221000043 Filed on October 28, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DFS Discover Financial Services Stock $dfs

2021 Q4 Form 10-Q Financial Statement

#000139361221000043 Filed on October 28, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DFS
Discover Financial Services Stock $dfs