$DFS
Discover Financial Services Stock $dfs

$dfs Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-Q Financial Statement

#000139361220000040 Filed on October 26, 2020

Income Statement

Concept	2020 Q4	2020 Q3	2019 Q3
Revenue	$2.760B	$2.681B	$3.040B
YoY Change	-9.18%	-11.81%	9.31%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development		$111.0M	$96.00M
YoY Change		15.63%	7.87%
% of Gross Profit
Depreciation & Amortization	$123.0M	$116.0M	$113.0M
YoY Change	1.65%	2.65%	2.73%
% of Gross Profit
Operating Expenses		$111.0M	$96.00M
YoY Change		15.63%	7.87%
Operating Profit
YoY Change
Interest Expense	$383.0M	$416.0M	$638.0M
YoY Change	-37.72%	-34.8%	14.34%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$1.015B	$959.0M	$994.0M
YoY Change	9.85%	-3.52%	2.79%
Income Tax	$216.0M	$188.0M	$224.0M
% Of Pretax Income	21.28%	19.6%	22.54%
Net Earnings	$799.0M	$771.0M	$770.0M
YoY Change	12.85%	0.13%	6.94%
Net Earnings / Revenue	28.95%	28.76%	25.33%
Basic Earnings Per Share	$2.59	$2.45	$2.36
Diluted Earnings Per Share	$2.59	$2.45	$2.36
COMMON SHARES
Basic Shares Outstanding	306.5M shares	306.0M shares	317.0M shares
Diluted Shares Outstanding		306.0M shares	317.0M shares

Balance Sheet

Concept	2020 Q4	2020 Q3	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$23.48B	$30.37B	$16.72B
YoY Change	34.01%	81.58%	-6.15%
Cash & Equivalents	$13.56B	$9.513B	$6.075B
Short-Term Investments	$9.914B	$20.85B	$10.65B
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$1.027B	$1.121B	$1.028B
YoY Change	-2.84%	9.05%	14.73%
Goodwill	$255.0M	$255.0M	$255.0M
YoY Change	0.0%	0.0%	0.0%
Intangibles	$95.00M	$95.00M	$159.0M
YoY Change	-38.71%	-40.25%	-1.85%
Long-Term Investments	$353.0M	$323.0M	$321.0M
YoY Change	5.06%	0.62%	22.05%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$112.9B	$124.3B	$110.8B
YoY Change	-0.97%	12.24%	4.67%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$3.860B	$3.541B	$3.594B
YoY Change	4.61%	-1.47%	-13.48%
Deferred Revenue
YoY Change
Short-Term Debt		$10.70B
YoY Change
Long-Term Debt Due	$4.217B	$550.0M	$200.0M
YoY Change	-19.63%	175.0%	-87.09%
Total Short-Term Liabilities	$8.077B	$4.091B	$3.794B
YoY Change	-9.62%	7.83%	-33.47%
LONG-TERM LIABILITIES
Long-Term Debt	$17.02B	$21.29B	$24.25B
YoY Change	-16.77%	-12.22%	-4.7%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$17.02B	$21.29B	$24.25B
YoY Change	-16.77%	-12.22%	-4.7%
TOTAL LIABILITIES
Total Short-Term Liabilities	$8.077B	$4.091B	$3.794B
Total Long-Term Liabilities	$17.02B	$21.29B	$24.25B
Total Liabilities	$102.0B	$114.1B	$99.07B
YoY Change	-0.13%	15.17%	4.47%
SHAREHOLDERS EQUITY
Retained Earnings	$19.96B	$19.29B	$20.72B
YoY Change	-6.27%	-6.89%	12.89%
Common Stock	$6.000M	$6.000M	$6.000M
YoY Change	0.0%	0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$14.44B	$14.43B	$13.69B
YoY Change	2.47%	5.44%	15.45%
Treasury Stock Shares	261.3M shares	261.2M shares	251.6M shares
Shareholders Equity	$10.88B	$10.25B	$11.72B
YoY Change
Total Liabilities & Shareholders Equity	$112.9B	$124.3B	$110.8B
YoY Change	-0.97%	12.24%	4.67%

Cashflow Statement

Concept	2020 Q4	2020 Q3	2019 Q3
OPERATING ACTIVITIES
Net Income	$799.0M	$771.0M	$770.0M
YoY Change	12.85%	0.13%	6.94%
Depreciation, Depletion And Amortization	$123.0M	$116.0M	$113.0M
YoY Change	1.65%	2.65%	2.73%
Cash From Operating Activities	$1.633B	$1.296B	$819.0M
YoY Change	11.54%	58.24%	-49.0%
INVESTING ACTIVITIES
Capital Expenditures	-$55.00M	-$53.00M	-$61.00M
YoY Change	-23.61%	-13.11%	3.39%
Acquisitions
YoY Change
Other Investing Activities	$3.751B	-$5.522B	-$5.969B
YoY Change	-225.75%	-7.49%	100.5%
Cash From Investing Activities	$3.696B	-$5.575B	-$6.030B
YoY Change	-220.98%	-7.55%	98.62%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-1.829B	-799.0M	-30.00M
YoY Change	-174.87%	2563.33%	-101.42%
NET CHANGE
Cash From Operating Activities	1.633B	1.296B	819.0M
Cash From Investing Activities	3.696B	-5.575B	-6.030B
Cash From Financing Activities	-1.829B	-799.0M	-30.00M
Net Change In Cash	3.500B	-5.078B	-5.241B
YoY Change	310.8%	-3.11%	-859.57%
FREE CASH FLOW
Cash From Operating Activities	$1.633B	$1.296B	$819.0M
Capital Expenditures	-$55.00M	-$53.00M	-$61.00M
Free Cash Flow	$1.688B	$1.349B	$880.0M
YoY Change	9.9%	53.3%	-47.15%

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	2020
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Amendment Flag AmendmentFlag	false
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	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2020-09-30
	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
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	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
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	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	342000000	USD
	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	296000000	USD
CY2020Q3	us-gaap	Professional Fees ProfessionalFees	151000000	USD
CY2019Q3	us-gaap	Professional Fees ProfessionalFees	189000000	USD
	us-gaap	Professional Fees ProfessionalFees	525000000	USD
	us-gaap	Professional Fees ProfessionalFees	539000000	USD
CY2020Q3	us-gaap	Occupancy Net OccupancyNet	26000000	USD
CY2019Q3	us-gaap	Occupancy Net OccupancyNet	26000000	USD
	us-gaap	Occupancy Net OccupancyNet	83000000	USD
	us-gaap	Occupancy Net OccupancyNet	80000000	USD
CY2020Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	106000000	USD
CY2019Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	127000000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	401000000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	354000000	USD
CY2020Q3	us-gaap	Noninterest Expense NoninterestExpense	1005000000	USD
CY2019Q3	us-gaap	Noninterest Expense NoninterestExpense	1107000000	USD
	us-gaap	Noninterest Expense NoninterestExpense	3241000000	USD
	us-gaap	Noninterest Expense NoninterestExpense	3209000000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	959000000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	994000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	420000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2911000000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	188000000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	224000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	78000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	662000000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	771000000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	770000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	342000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	2249000000	USD
CY2020Q3	dfs	Net Income Loss Allocated To Common Stockholders NetIncomeLossAllocatedToCommonStockholders	751000000	USD
CY2019Q3	dfs	Net Income Loss Allocated To Common Stockholders NetIncomeLossAllocatedToCommonStockholders	749000000	USD
	dfs	Net Income Loss Allocated To Common Stockholders NetIncomeLossAllocatedToCommonStockholders	309000000	USD
	dfs	Net Income Loss Allocated To Common Stockholders NetIncomeLossAllocatedToCommonStockholders	2203000000	USD
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.45
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.36
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.00
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.83
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.45
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.36
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.00
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.82
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	771000000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	770000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	342000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	2249000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-32000000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	17000000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	208000000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	119000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	3000000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-8000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	4000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-38000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	0	USD
CY2019Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	0	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	0	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-1000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-29000000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	9000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	212000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	82000000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	742000000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	779000000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	554000000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2331000000	USD
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	11493000000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	770000000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	9000000	USD
CY2019Q3	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	419000000	USD
CY2019Q3	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	3000000	USD
CY2019Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	18000000	USD
CY2019Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.44
CY2019Q3	us-gaap	Dividends Common Stock DividendsCommonStock	142000000	USD
CY2019Q3	us-gaap	Preferred Stock Dividends Per Share Declared PreferredStockDividendsPerShareDeclared	2750
CY2019Q3	us-gaap	Dividends Preferred Stock DividendsPreferredStock	15000000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	11717000000	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	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	0	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	Preferred Stock Dividends Per Share Declared PreferredStockDividendsPerShareDeclared	2750
CY2020Q3	us-gaap	Dividends Preferred Stock DividendsPreferredStock	15000000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	10252000000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	11130000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	2249000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	82000000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	1367000000	USD
	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	6000000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	52000000	USD
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.24
	us-gaap	Dividends Common Stock DividendsCommonStock	404000000	USD
	us-gaap	Preferred Stock Dividends Per Share Declared PreferredStockDividendsPerShareDeclared	5500
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	31000000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	11717000000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	11859000000	USD
	dfs	Cumulative Effectof Asu No.201613 Adoption CumulativeEffectofASUNo.201613Adoption	1902000000	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
	us-gaap	Preferred Stock Dividends Per Share Declared PreferredStockDividendsPerShareDeclared	5500
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	31000000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	10252000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	342000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	2249000000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	4603000000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	2395000000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-600000000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-95000000	USD
	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	362000000	USD
	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	106000000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	0	USD
	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	315000000	USD
	dfs	Amortizationofdeferredrevenuesandaccretionofaccretableyieldonacquiredloans Amortizationofdeferredrevenuesandaccretionofaccretableyieldonacquiredloans	245000000	USD
	dfs	Amortizationofdeferredrevenuesandaccretionofaccretableyieldonacquiredloans Amortizationofdeferredrevenuesandaccretionofaccretableyieldonacquiredloans	311000000	USD
	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	40000000	USD
	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-30000000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	87000000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	59000000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-212000000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	33000000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-158000000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	123000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4563000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4732000000	USD
	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	8046000000	USD
	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	1000000000	USD
	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	724000000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	7183000000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	34000000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	21000000	USD
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	44000000	USD
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	54000000	USD
	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	-5316000000	USD
	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	3848000000	USD
	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	94000000	USD
	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	0	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	54000000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	49000000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	206000000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	212000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2182000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-12219000000	USD
	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	USD
	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	2027000000	USD
	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	2974000000	USD
	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	6278000000	USD
	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	494000000	USD
	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	1341000000	USD
	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	1754000000	USD
	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	86000000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	7000000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	6000000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	343000000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1367000000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	5245000000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	3231000000	USD
	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	493000000	USD
	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	0	USD
	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	424000000	USD
	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	420000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	744000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1546000000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	3125000000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-9033000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6964000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	15145000000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	10089000000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6112000000	USD
CY2020Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	9513000000	USD
CY2019Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	6075000000	USD
CY2020Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	576000000	USD
CY2019Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	37000000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	10089000000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6112000000	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.
CY2020Q3	us-gaap	Other Short Term Investments OtherShortTermInvestments	8048000000	USD
CY2019Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	0	USD
CY2020Q3	us-gaap	Marketable Securities MarketableSecurities	20854000000	USD
CY2019Q4	us-gaap	Marketable Securities MarketableSecurities	10595000000	USD
CY2020Q3	us-gaap	Securities Loaned SecuritiesLoaned	11400000000	USD
CY2020Q3	us-gaap	Securities Received As Collateral SecuritiesReceivedAsCollateral	11600000000	USD
CY2020Q3	dfs	Dfs Fair Value Above Ust Bills Lent Dfs_FairValueAboveUSTBillsLent	1.02
CY2020Q3	us-gaap	Securities Received As Collateral SecuritiesReceivedAsCollateral	11600000000	USD
CY2020Q3	us-gaap	Collateral Securities Repledged Delivered Or Used CollateralSecuritiesRepledgedDeliveredOrUsed	0	USD
CY2020Q3	us-gaap	Securities Received As Collateral SecuritiesReceivedAsCollateral	11600000000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	20148000000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	425000000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	0	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	20573000000	USD
CY2020Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	281000000	USD
CY2020Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	9000000	USD
CY2020Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	USD
CY2020Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	290000000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	10173000000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	158000000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	8000000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	10323000000	USD
CY2019Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	272000000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	3000000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	1000000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	274000000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2020Q3	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
CY2019Q3	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
CY2019Q3	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	1880000000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	7308000000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	291000000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	10669000000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	20148000000	USD
CY2020Q3	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	0	USD
CY2020Q3	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	0	USD
CY2020Q3	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	0	USD
CY2020Q3	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	281000000	USD
CY2020Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	281000000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	1900000000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	7704000000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	300000000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	10669000000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	20573000000	USD
CY2020Q3	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	0	USD
CY2020Q3	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	0	USD
CY2020Q3	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	0	USD
CY2020Q3	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	290000000	USD
CY2020Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	290000000	USD
CY2020Q3	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	292000000	USD
CY2019Q4	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	298000000	USD
CY2020Q3	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	45000000	USD
CY2019Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	59000000	USD
	dfs	Loan Portfolio Segments LoanPortfolioSegments	2	segment
	dfs	Loan Portfolio Segments LoanPortfolioSegments	2	segment
CY2020Q3	us-gaap	Notes Receivable Gross NotesReceivableGross	88660000000	USD
CY2019Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	95894000000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8226000000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	3383000000	USD
CY2020Q3	us-gaap	Notes Receivable Net NotesReceivableNet	80434000000	USD
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	92511000000	USD
CY2020Q3	dfs	Revolving Lineof Credit Arrangement Convertedto Term Loanthrough Loan Modification Program Ending Balance RevolvingLineofCreditArrangementConvertedtoTermLoanthroughLoanModificationProgramEndingBalance	1000000000.0	USD
CY2019Q4	dfs	Revolving Lineof Credit Arrangement Convertedto Term Loanthrough Loan Modification Program Ending Balance RevolvingLineofCreditArrangementConvertedtoTermLoanthroughLoanModificationProgramEndingBalance	956000000	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
CY2019Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	3202000000	USD
CY2019Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	799000000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	891000000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	189000000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	702000000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	3299000000	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
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	3041000000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	2395000000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	2676000000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	541000000	USD
	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	2135000000	USD
	dfs	Financing Receivable Allowancefor Credit Loss Other Adjustment FinancingReceivableAllowanceforCreditLossOtherAdjustment	2000000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	3299000000	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	17000000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8200000000	USD
CY2020Q3	dfs	Expected Future Unemployment Rate ExpectedFutureUnemploymentRate	0.11
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	8200000000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	4800000000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	2300000000	USD
CY2020Q1	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
CY2020Q3	dfs	Interest And Fees Accrued Subsequently Charged Off Net Of Recoveries InterestAndFeesAccruedSubsequentlyChargedOffNetOfRecoveries	114000000	USD
CY2019Q3	dfs	Interest And Fees Accrued Subsequently Charged Off Net Of Recoveries InterestAndFeesAccruedSubsequentlyChargedOffNetOfRecoveries	127000000	USD
	dfs	Interest And Fees Accrued Subsequently Charged Off Net Of Recoveries InterestAndFeesAccruedSubsequentlyChargedOffNetOfRecoveries	393000000	USD
	dfs	Interest And Fees Accrued Subsequently Charged Off Net Of Recoveries InterestAndFeesAccruedSubsequentlyChargedOffNetOfRecoveries	382000000	USD
CY2020Q3	dfs	Fees Accrued Subsequently Charged Off Net Of Recoveries FeesAccruedSubsequentlyChargedOffNetOfRecoveries	27000000	USD
CY2019Q3	dfs	Fees Accrued Subsequently Charged Off Net Of Recoveries FeesAccruedSubsequentlyChargedOffNetOfRecoveries	29000000	USD
	dfs	Fees Accrued Subsequently Charged Off Net Of Recoveries FeesAccruedSubsequentlyChargedOffNetOfRecoveries	95000000	USD
	dfs	Fees Accrued Subsequently Charged Off Net Of Recoveries FeesAccruedSubsequentlyChargedOffNetOfRecoveries	90000000	USD
CY2020Q3	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	1567000000	USD
CY2020Q2	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	6.125
CY2020Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	657000000	USD
CY2020Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	228000000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	2312000000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	1014000000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	266000000	USD
CY2020Q3	dfs	Student Loansin Repayment StudentLoansinRepayment	5300000000	USD
CY2019Q4	dfs	Student Loansin Repayment StudentLoansinRepayment	5600000000	USD
CY2020Q3	dfs	Student Loans In Forbearance StudentLoansInForbearance	64000000	USD
CY2019Q4	dfs	Student Loans In Forbearance StudentLoansInForbearance	46000000	USD
	dfs	Financing Receivable Modifications Subsequent Default Numberof Missed Payments FinancingReceivableModificationsSubsequentDefaultNumberofMissedPayments	2	missed_payments
CY2020Q3	dfs	Percentage Of Defaulted Loans That Charged Off PercentageOfDefaultedLoansThatChargedOff	0.65
CY2019Q3	dfs	Percentage Of Defaulted Loans That Charged Off PercentageOfDefaultedLoansThatChargedOff	0.37
	dfs	Percentage Of Defaulted Loans That Charged Off PercentageOfDefaultedLoansThatChargedOff	0.52
	dfs	Percentage Of Defaulted Loans That Charged Off PercentageOfDefaultedLoansThatChargedOff	0.38
	us-gaap	Financing Receivable Allowance For Credit Losses Policy For Uncollectible Amounts FinancingReceivableAllowanceForCreditLossesPolicyForUncollectibleAmounts	<div style="margin-top:5pt;margin-bottom:5pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;">Allowance for Credit Losses</span></div><div style="text-indent:27pt;margin-bottom:10pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">The Company maintains an allowance for credit losses at a level that is appropriate to absorb credit losses anticipated over the remaining expected life of loan receivables as of the balance sheet date. The estimate of expected credit losses considers uncollectible principal, interest and fees associated with the Company's loan receivables existing as of the balance sheet date. Additionally, the estimate includes expected recoveries of amounts that were either previously charged off or are expected to be charged off. The allowance is evaluated quarterly for appropriateness and is maintained through an adjustment to the provision for credit losses. Charge-offs of principal amounts of loans outstanding are deducted from the allowance and subsequent recoveries of such amounts increase the allowance. Charge-offs of loan balances representing unpaid interest and fees result in a reversal of interest and fee income, respectively, which is effectively a reclassification of the provision for credit losses.</span></div><div style="text-indent:27pt;margin-bottom:10pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">The Company calculates its allowance for credit losses by estimating expected credit losses separately for classes of the loan portfolio with similar risk characteristics, which results in segmenting the portfolio by loan product type. The allowance for credit losses for each loan product type is based on: 1) a reasonable and supportable forecast period, 2) a reversion period and 3) a post-reversion period based on historical information covering the remaining life of the loan, all of which is netted with expected recoveries. The lengths of the reasonable and supportable forecast and reversion periods can vary and are subject to a quarterly assessment that considers the economic outlook and level of variability among macroeconomic forecasts. Generally, a straight-line method is used to revert from the reasonable and supportable forecast period to the post-reversion period, but in certain stressed scenarios, a weighted approach may be deemed more appropriate.</span></div><div style="text-indent:27pt;margin-bottom:10pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">Several analyses are used to help estimate credit losses anticipated over the remaining expected life of loan receivables as of the balance sheet date. The Company's estimation process includes models that predict customer losses based on risk characteristics and portfolio attributes, macroeconomic variables, and historical data and analysis. There is a significant amount of judgment applied in selecting inputs and analyzing the results produced by the models to determine the allowance.</span></div><div style="text-indent:27pt;margin-bottom:10pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">For credit card loans, the Company uses a modeling framework that includes the following components for estimating expected credit losses:</span></div><div style="text-indent:-18pt;padding-left:45pt;margin-top:6pt;margin-bottom:3pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">•</span><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt;">Probability of default: this model estimates the probability of charge-off at different points in time over the life of each loan.</span></div><div style="text-indent:-18pt;padding-left:45pt;margin-top:6pt;margin-bottom:3pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">•</span><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt;">Exposure at default: this model estimates the portion of the balance sheet date balance remaining at any given time of charge-off for each loan. Given that there is no stated life of a receivable balance on a revolving credit card account, the Company applies a percentage of expected payments to estimate the portion of the balance that would remain at the time of charge-off.</span></div><div style="text-indent:-18pt;padding-left:45pt;margin-top:6pt;margin-bottom:3pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">•</span><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt;">Loss given default: this model estimates the percentage of exposure (i.e. net loss) at time of charge-off that cannot be recovered, with the offsetting forecast recoveries being the driver of this estimate.</span></div><div style="text-indent:-18pt;padding-left:45pt;margin-top:6pt;margin-bottom:10pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">•</span><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt;">Recoveries from previously charged-off accounts are estimated separately and are netted as part of the aggregation of all of the components of the card loss modeling framework.</span></div><div style="text-indent:27pt;margin-bottom:10pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">For student loans and personal loans, the Company uses vintage-based models that estimate expected credit losses over the life of the loan, net of recovery estimates, impacted mainly by time elapsed since origination, credit quality of origination vintages and macroeconomic forecasts.</span></div><div style="text-indent:27pt;margin-bottom:10pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">The models described above for credit card, student and personal loans are developed utilizing historical data and applicable macroeconomic variable inputs based on statistical analysis and behavioral relationships with credit performance. Expected recoveries from loans charged off as of the balance sheet date are modeled separately and included in the allowance estimate. The Company leverages these models and recent macroeconomic forecasts for the portion of the estimate associated with the reasonable and supportable forecast period. To estimate expected credit losses for the remainder of the life of the credit card loans, the Company reverts to historical experience of credit card loans with characteristics similar to those as of the balance sheet date and observed over various phases of a credit cycle. To estimate expected credit losses for the remainder of the life of student and personal loans, the Company reverts to use of average macroeconomic variables over an appropriate historical period.</span></div><div style="text-indent:27pt;margin-bottom:10pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">The considerations in these models include past and current loan performance, loan growth and seasoning, risk management practices, account collection strategies, economic conditions, bankruptcy filings, policy changes and forecasting uncertainties. Consideration of past and current loan performance includes the post-modification performance of loans modified in a TDR. For the credit card loan portfolio, the Company estimates its credit losses on a loan-level basis, which includes loans that are delinquent and/or no longer accruing interest and/or loans that have been modified under a TDR. For the remainder of its portfolio, including student, personal and other loans, the Company estimates its credit losses on a pooled basis. For all loan types, recoveries are estimated at a pooled level based on estimates of future cash flows derived using historical experience.</span></div><div style="text-indent:27pt;margin-bottom:10pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">Interest on credit card loans is included in the estimate of expected credit losses once billed to the customer (i.e., once the interest becomes part of the loan balance). An allowance for credit losses is measured for accrued interest on all other loans and is presented as part of allowance for credit losses in the consolidated statements of financial condition.</span></div><div style="text-indent:27pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">The Company records a liability for expected credit losses for unfunded commitments on all other loans, which is presented as part of accrued expenses and other liabilities in the consolidated statements of financial condition. This liability is evaluated quarterly for appropriateness and is maintained through an adjustment to the provision for credit losses. No liability for expected credit losses is required for unused lines of credit on the Company’s credit card loans because they are unconditionally cancellable.</span></div>
	dfs	Deposits Source Channels DepositsSourceChannels	2	channels
CY2020Q3	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	21071000000	USD
CY2019Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	25113000000	USD
CY2020Q3	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	9771000000	USD
CY2019Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	9268000000	USD
CY2020Q3	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	46096000000	USD
CY2019Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	37574000000	USD
CY2020Q3	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	76938000000	USD
CY2019Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	71955000000	USD
CY2020Q3	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	2800000000	USD
CY2019Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	2600000000	USD
CY2020Q3	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Or Less ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsOrLess	1734000000	USD
CY2020Q3	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Through Six Months ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsThroughSixMonths	2375000000	USD
CY2020Q3	us-gaap	Contractual Maturities Time Deposits100000 Or More Six Months Through12 Months ContractualMaturitiesTimeDeposits100000OrMoreSixMonthsThrough12Months	3166000000	USD
CY2020Q3	us-gaap	Contractual Maturities Time Deposits100000 Or More After12 Months ContractualMaturitiesTimeDeposits100000OrMoreAfter12Months	2496000000	USD
CY2020Q3	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	9771000000	USD
CY2020Q3	us-gaap	Time Deposit Maturities Remainder Of Fiscal Year TimeDepositMaturitiesRemainderOfFiscalYear	4861000000	USD
CY2020Q3	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	15825000000	USD
CY2020Q3	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	4353000000	USD
CY2020Q3	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	2214000000	USD
CY2020Q3	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	1357000000	USD
CY2020Q3	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	2232000000	USD
CY2020Q3	us-gaap	Time Deposits TimeDeposits	30842000000	USD
CY2020Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	21841000000	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	25701000000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal Remainder Of Fiscal Year LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear	550000000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	4232000000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	5204000000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	3411000000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	2630000000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	5814000000	USD
CY2020Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	21841000000	USD
CY2020Q2	us-gaap	Preferred Stock Redemption Amount PreferredStockRedemptionAmount	1000	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 Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	0	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	0	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	0	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
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CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	1000000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	-11000000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-3000000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-8000000	USD
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	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	0	USD
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CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	188000000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	224000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	78000000	USD
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CY2020Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.196
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CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	770000000	USD
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CY2020Q3	us-gaap	Dividends Preferred Stock DividendsPreferredStock	15000000	USD
CY2019Q3	us-gaap	Dividends Preferred Stock DividendsPreferredStock	15000000	USD
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CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	756000000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	755000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	311000000	USD
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CY2020Q3	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	5000000	USD
CY2019Q3	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	6000000	USD
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CY2019Q3	dfs	Net Income Loss Allocated To Common Stockholders NetIncomeLossAllocatedToCommonStockholders	749000000	USD
	dfs	Net Income Loss Allocated To Common Stockholders NetIncomeLossAllocatedToCommonStockholders	309000000	USD
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CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	306000000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	317000000	shares
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CY2019Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
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CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	306000000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	317000000	shares
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CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.45
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.36
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CY2020Q3	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
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CY2020Q3	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	0	USD
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CY2019Q4	dfs	Derivative Collateral Rightto Reclaim Cashand Securities DerivativeCollateralRighttoReclaimCashandSecurities	7000000	USD
CY2020Q3	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	0	USD
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CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	0	USD
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	0	USD
CY2020Q3	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	9000000	USD
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CY2020Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	2681000000	USD
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CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	449000000	USD
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CY2019Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	3040000000	USD
CY2019Q3	us-gaap	Interest Expense InterestExpense	638000000	USD
CY2019Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	2402000000	USD
CY2019Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	799000000	USD
CY2019Q3	us-gaap	Noninterest Income NoninterestIncome	498000000	USD
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	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2911000000	USD
CY2020Q3	dfs	Loanfeeincome Loanfeeincome	100000000	USD
CY2020Q3	dfs	Noninterest Incomenot Subjectto Asc606 NoninterestIncomenotSubjecttoASC606	100000000	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	449000000	USD
CY2019Q3	dfs	Loanfeeincome Loanfeeincome	120000000	USD
CY2019Q3	dfs	Noninterest Incomenot Subjectto Asc606 NoninterestIncomenotSubjecttoASC606	120000000	USD
CY2019Q3	us-gaap	Noninterest Income NoninterestIncome	498000000	USD
CY2020Q3	dfs	Customer Rewardsand Issuer Interchange CustomerRewardsandIssuerInterchange	514000000	USD
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CY2020Q3	us-gaap	Interest Expense Domestic Deposit Liabilities Withdrawal Penalties InterestExpenseDomesticDepositLiabilitiesWithdrawalPenalties	1000000	USD
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$DFS
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2020 Q4 Form 10-Q Financial Statement

#000139361220000040 Filed on October 26, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DFS Discover Financial Services Stock $dfs

2020 Q4 Form 10-Q Financial Statement

#000139361220000040 Filed on October 26, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DFS
Discover Financial Services Stock $dfs