Investments - Components of Net Investment Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net Investment Income [Line Items]
Net investment income	$ 277	$ 414	[1]

[1] Amounts have been restated to reflect the adoption of Targeted Improvements to the Accounting for Long-Duration Contracts in 2023. See Note 2 to the Consolidated Financial Statements for further information.