v3.26.1
Derivatives - Cash Flow Hedges (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Net Investment Income $ 800 $ 658 $ 1,534 $ 1,310
Interest Expense 50 50 100 100
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 (33) (40) (33) (36)
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 4 6
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 2 0 4 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 (2) (1) (4)
Interest Expense 2 3 4 6
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 (34) 3 (52) 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 4 6
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 (2) (1) (4)
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 2 2 5 5
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 1 (43) 19 (49)
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 $ 2 $ 2 $ 5 $ 5