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Derivative Financial Instruments - Effect of Qualifying Hedge Accounting (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Derivative Instruments, Gain (Loss) [Line Items]
Realized capital gains (losses)	$ (56)	$ (50)	$ (107)	$ (69)
Interest rate contracts \| Designated as Hedging Instrument \| Income Statement Location [Axis]: us-gaap:NetInvestmentIncome
Derivative Instruments, Gain (Loss) [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
Derivative Instruments, Gain (Loss) [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
Derivative Instruments, Gain (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0	0	0	0
Foreign exchange contracts \| Cash flow hedges \| Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [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:NetInvestmentIncome
Derivative Instruments, Gain (Loss) [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
Derivative Instruments, Gain (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	$ 0	$ 0	$ 0	$ 0