Segment Information (Premiums, Universal Life and Investment-Type Product Policy Fees and Other Revenues by Major Product Group) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Total premiums, universal life and investment-type product policy fees and other revenues	$ 726	$ 629
Annuity products
Segment Reporting Information [Line Items]
Total premiums, universal life and investment-type product policy fees and other revenues	491	522
Life insurance products
Segment Reporting Information [Line Items]
Total premiums, universal life and investment-type product policy fees and other revenues	233	105
Other products
Segment Reporting Information [Line Items]
Total premiums, universal life and investment-type product policy fees and other revenues	$ 2	$ 2