v3.26.1
Derivatives (Credit Risk on Freestanding Derivatives) (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Credit Derivatives [Line Items]    
Estimated fair value of derivatives in a net liability position $ 3,612 $ 3,957
Derivative, Collateral, Right to Reclaim Cash 76 68
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 7,665 7,178
Derivative Liability, Fair Value, Amount Not Offset Against Collateral 7,465 7,547
Derivative Asset, Fair Value, Amount Offset Against Collateral 60 32
Derivative Liability, Fair Value, Amount Offset Against Collateral 59 13
Derivative assets (2) 7,549 7,045
Derivative liabilities (2) 7,413 7,548
Derivative, Collateral, Obligation to Return Cash 73 29
Collateral Amount Not Provided Due to Downgrade Threshold 15  
Derivative [Line Items]    
Derivative assets (2) 7,549 7,045
Derivative liabilities (2) 7,413 7,548
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Fair Value of Securities Received as Collateral that Can be Resold or Repledged 0  
Collateral Securities Repledged, Delivered, or Used 5  
Derivatives
Subject to
Credit-
Contingent
Provisions    
Credit Derivatives [Line Items]    
Estimated fair value of derivatives in a net liability position 3,612 3,946
Derivatives
Not Subject
to Credit-
Contingent
Provisions    
Credit Derivatives [Line Items]    
Estimated fair value of derivatives in a net liability position 0 11
Exchange Traded [Member]    
Credit Derivatives [Line Items]    
Derivative, Collateral, Right to Reclaim Securities 280 215
Gross estimated fair value of derivative assets 13 6
Gross estimated fair value of derivative liabilities 15 6
Derivative Asset, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset (1) 0
Derivative Liability, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset (1) 0
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset 0 0
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset (2) (1)
Derivative Asset, Collateral, Obligation to Return Securities, Offset 0 0
Derivative Liability, Collateral, Right to Reclaim Securities, Offset (12) (5)
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Gross estimated fair value of derivative assets 13 6
Over the Counter [Member]    
Credit Derivatives [Line Items]    
Derivative, Collateral, Right to Reclaim Securities 1,300 1,300
Gross estimated fair value of derivative assets 7,390 7,053
Gross estimated fair value of derivative liabilities 6,722 6,972
Derivative Asset, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset (3,110) (3,015)
Derivative Liability, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset (3,110) (3,015)
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset (2,270) (1,808)
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset 0 0
Derivative Asset, Collateral, Obligation to Return Securities, Offset (1,978) (2,211)
Derivative Liability, Collateral, Right to Reclaim Securities, Offset (3,553) (3,945)
Derivative, Collateral, Obligation to Return Securities 393 381
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Gross estimated fair value of derivative assets 7,390 7,053
Exchange Cleared [Member]    
Credit Derivatives [Line Items]    
Derivative, Collateral, Right to Reclaim Securities 752 751
Gross estimated fair value of derivative assets 262 119
Gross estimated fair value of derivative liabilities 728 569
Derivative Asset, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset (16) (7)
Derivative Liability, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset (16) (7)
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset (230) (105)
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset (680) (555)
Derivative Asset, Collateral, Obligation to Return Securities, Offset 0 0
Derivative Liability, Collateral, Right to Reclaim Securities, Offset (32) (6)
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Gross estimated fair value of derivative assets 262 119
StatementOfFinancialPositionLocationBalance [Axis]: us-gaap:DebtInstrumentCollateral    
Credit Derivatives [Line Items]    
Estimated fair value of collateral provided: 4,190 4,672
StatementOfFinancialPositionLocationBalance [Axis]: us-gaap:DebtInstrumentCollateral | Derivatives
Subject to
Credit-
Contingent
Provisions    
Credit Derivatives [Line Items]    
Estimated fair value of collateral provided: 4,190 4,661
StatementOfFinancialPositionLocationBalance [Axis]: us-gaap:DebtInstrumentCollateral | Derivatives
Not Subject
to Credit-
Contingent
Provisions    
Credit Derivatives [Line Items]    
Estimated fair value of collateral provided: 0 11
StatementOfFinancialPositionLocationBalance [Axis]: us-gaap:DerivativeAssets    
Credit Derivatives [Line Items]    
Derivative assets (2) 116 133
Derivative [Line Items]    
Derivative assets (2) 116 133
StatementOfFinancialPositionLocationBalance [Axis]: us-gaap:DerivativeLiabilities    
Credit Derivatives [Line Items]    
Derivative liabilities (2) 52 (1)
Derivative [Line Items]    
Derivative liabilities (2) $ 52 $ (1)