v3.26.1
Derivative Financial Instruments - Effect on Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Derivatives Instruments and Hedging Activities Disclosure [Line Items]        
Net Investment Income $ 407 $ 434 $ 840 $ 847
Realized capital gains (losses) (56) (50) (107) (69)
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 33 (24) 34 (42)
Interest rate contracts | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses        
Derivatives Instruments and Hedging Activities Disclosure [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 31 (26) 48 (64)
Interest rate contracts | Designated as Hedging Instrument | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome        
Derivatives Instruments and Hedging Activities Disclosure [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge   0   0
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments   0   0
Interest rate contracts | Designated as Hedging Instrument | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses        
Derivatives Instruments and Hedging Activities Disclosure [Line Items]        
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge   0   0
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments   0   0
Interest rate contracts | Cash flow hedges | Designated as Hedging Instrument        
Derivatives Instruments and Hedging Activities Disclosure [Line Items]        
Other Comprehensive Income (Loss), before Reclassifications, before Tax 0 0 0 0
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax 0 0 0 0
Foreign exchange contracts | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome        
Derivatives Instruments and Hedging Activities Disclosure [Line Items]        
Gain (Loss) on Fair Value Hedges Recognized in Earnings 0   0  
Foreign exchange contracts | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses        
Derivatives Instruments and Hedging Activities Disclosure [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 0 (6) 1 (5)
Gain (Loss) on Fair Value Hedges Recognized in Earnings 2   1  
Foreign exchange contracts | Designated as Hedging Instrument | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome        
Derivatives Instruments and Hedging Activities Disclosure [Line Items]        
Gain (Loss) on Fair Value Hedges Recognized in Earnings 0   0  
Foreign exchange contracts | Designated as Hedging Instrument | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses        
Derivatives Instruments and Hedging Activities Disclosure [Line Items]        
Gain (Loss) on Fair Value Hedges Recognized in Earnings (2)   (1)  
Foreign exchange contracts | Cash flow hedges | Designated as Hedging Instrument        
Derivatives Instruments and Hedging Activities Disclosure [Line Items]        
Other Comprehensive Income (Loss), before Reclassifications, before Tax (5) (34) 4 (47)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax 2 1 3 2
Foreign exchange contracts | Cash flow hedges | Designated as Hedging Instrument | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome        
Derivatives Instruments and Hedging Activities Disclosure [Line Items]        
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax 2 1 3 2
Foreign exchange contracts | Cash flow hedges | Designated as Hedging Instrument | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses        
Derivatives Instruments and Hedging Activities Disclosure [Line Items]        
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax $ 0 $ 0 $ 0 $ 0