v3.26.1
Derivatives and Hedging Activities (Offsetting of Derivative Assets and Derivative Liabilities) (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Offsetting Assets and Liabilities [Line Items]    
Derivative Asset, Fair Value, Gross Asset $ 269 $ 240
Derivative Liability, Fair Value, Gross Liability 52 29
Derivative Asset, Subject to Master Netting Arrangement, Gross Liability and Collateral, Obligation to Return Cash, Offset (181) (160)
Derivative Asset, Not Subject to Master Netting Arrangement 0 0
Derivative Liability, Subject to Master Netting Arrangement, Gross Asset and Collateral, Right to Reclaim Cash, Offset (45) (26)
Derivative Liability, Not Subject to Master Netting Arrangement 0 0
Derivative assets, net 88 80
Derivative liabilities, net 7 3
Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction 88 80
Derivative Liability, Including Not Subject to Master Netting Arrangement, after Offset and Deduction 7 3
Derivative, Collateral, Obligation to Return Securities That Can Be Sold or Repledged 0 0
Derivative, Collateral, Right to Reclaim Securities That Can Be Sold or Repledged 0 0
Debt Securities, Trading, Restricted 1,515 1,390
Over the Counter [Member]    
Offsetting Assets and Liabilities [Line Items]    
Derivative Asset, Fair Value, Gross Asset 177 159
Derivative Liability, Fair Value, Gross Liability 48 27
Derivative Asset, Subject to Master Netting Arrangement, Gross Liability and Collateral, Obligation to Return Cash, Offset (177) (158)
Derivative Asset, Not Subject to Master Netting Arrangement 0 0
Derivative Liability, Subject to Master Netting Arrangement, Gross Asset and Collateral, Right to Reclaim Cash, Offset (41) (24)
Derivative Liability, Not Subject to Master Netting Arrangement 0 0
Derivative assets, net 0 1
Derivative liabilities, net 7 3
Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction 0 1
Derivative Liability, Including Not Subject to Master Netting Arrangement, after Offset and Deduction 7 3
Derivative, Collateral, Obligation to Return Securities That Can Be Sold or Repledged 0 0
Derivative, Collateral, Right to Reclaim Securities That Can Be Sold or Repledged 0 0
Exchange Cleared [Member]    
Offsetting Assets and Liabilities [Line Items]    
Derivative Asset, Fair Value, Gross Asset 92 81
Derivative Liability, Fair Value, Gross Liability 4 2
Derivative Asset, Subject to Master Netting Arrangement, Gross Liability and Collateral, Obligation to Return Cash, Offset (4) (2)
Derivative Asset, Not Subject to Master Netting Arrangement 0 0
Derivative Liability, Subject to Master Netting Arrangement, Gross Asset and Collateral, Right to Reclaim Cash, Offset (4) (2)
Derivative Liability, Not Subject to Master Netting Arrangement 0 0
Derivative assets, net 88 79
Derivative liabilities, net 0 0
Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction 88 79
Derivative Liability, Including Not Subject to Master Netting Arrangement, after Offset and Deduction 0 0
Derivative, Collateral, Obligation to Return Securities That Can Be Sold or Repledged 0 0
Derivative, Collateral, Right to Reclaim Securities That Can Be Sold or Repledged 0 0
Additional Net Excess Exposure Collateral Pledged to Counterparties    
Offsetting Assets and Liabilities [Line Items]    
Debt Securities, Trading, Restricted $ 1,500 $ 1,400