v3.26.3
Derivatives - Cash Flow Hedges (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Net Investment Income $ 850 $ 755 $ 2,384 $ 2,065
Interest Expense 50 50 150 150
Cash Flow Hedging | Designated as Hedging Instrument        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax (91) 14 (124) (22)
Cash Flow Hedging | Designated as Hedging Instrument | Reclassification out of Accumulated Other Comprehensive Income | Income Statement Location [Axis]: us-gaap:InterestExpense        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Gain (Loss) on Hedging Activity 2 3 6 9
Cash Flow Hedging | Designated as Hedging Instrument | Reclassification out of Accumulated Other Comprehensive Income | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Gain (Loss) on Hedging Activity 3 0 7 1
Interest rate swaps | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Net Investment Income 0 (3) (1) (7)
Interest Expense 2 3 6 9
Interest rate swaps | Cash Flow Hedging | Designated as Hedging Instrument        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax (88) 0 (140) 13
Interest rate swaps | Cash Flow Hedging | Designated as Hedging Instrument | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent | Income Statement Location [Axis]: us-gaap:InterestExpense        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Gain (Loss) on Hedging Activity 2 3 6 9
Interest rate swaps | Cash Flow Hedging | Designated as Hedging Instrument | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Gain (Loss) on Hedging Activity 0 (3) (1) (7)
Foreign currency swaps | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Net Investment Income 3 3 8 8
Foreign currency swaps | Cash Flow Hedging | Designated as Hedging Instrument        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax (3) 14 16 (35)
Foreign currency swaps | Cash Flow Hedging | Designated as Hedging Instrument | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent | Income Statement Location [Axis]: us-gaap:InterestExpense        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Gain (Loss) on Hedging Activity 0 0 0 0
Foreign currency swaps | Cash Flow Hedging | Designated as Hedging Instrument | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Gain (Loss) on Hedging Activity $ 3 $ 3 $ 8 $ 8