v3.26.1
Derivatives and Hedging Activities - Schedule of Derivative Instrument Cash Flow Hedge Earning Recognized by Income Statement Location (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Derivatives, Fair Value [Line Items]        
Net Gains (Losses) Recognized in OCI $ (201) $ 122 $ 250 $ 362
Net Gains (Losses) Reclassified From AOCI Into Income (27) (91) (64) (185)
Location, Statement of Income, Balance [Axis]: us-gaap:InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio | Interest rate | Cash Flow Hedging        
Derivatives, Fair Value [Line Items]        
Net Gains (Losses) Recognized in OCI (202) 122 247 363
Net Gains (Losses) Reclassified From AOCI Into Income (28) (90) (64) (183)
Location, Statement of Income, Balance [Axis]: us-gaap:InterestExpenseLongTermDebt | Interest rate | Cash Flow Hedging        
Derivatives, Fair Value [Line Items]        
Net Gains (Losses) Recognized in OCI     2 (1)
Net Gains (Losses) Reclassified From AOCI Into Income 0 (1) (1) (2)
Location, Statement of Income, Balance [Axis]: us-gaap:InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions | Interest rate | Cash Flow Hedging        
Derivatives, Fair Value [Line Items]        
Net Gains (Losses) Recognized in OCI $ 1 $ 0 $ 1 $ 0