Investments (excluding Consolidated Investment Entities) - Net Investment Income (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	$ 2,150,000,000	$ 2,230,000,000	$ 2,341,000,000
Less: Investment expenses	76,000,000	71,000,000	60,000,000
Net investment income	2,074,000,000	2,159,000,000	2,281,000,000
Investments in fixed maturities that did not produce net investment income	26,000,000	16,000,000
Fixed maturities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	1,678,000,000	1,766,000,000	1,940,000,000
Investments in fixed maturities that did not produce net investment income	18,000,000	10,000,000
Equity securities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	19,000,000	21,000,000	12,000,000
Mortgage loans on real estate
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	234,000,000	249,000,000	237,000,000
Policy loans
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	20,000,000	20,000,000	21,000,000
Short-term investments and cash equivalents
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	40,000,000	39,000,000	13,000,000
Other
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	$ 159,000,000	$ 135,000,000	$ 118,000,000