Segment Information (Premiums, Universal Life and Investment-Type Product Policy Fees and Other Revenues by Major Product Group) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total premiums, universal life and investment-type product policy fees and other revenues	$ 4,007	$ 3,877	$ 4,095
Annuity products
Segment Reporting Information [Line Items]
Total premiums, universal life and investment-type product policy fees and other revenues	2,640	2,448	2,522
Life insurance products
Segment Reporting Information [Line Items]
Total premiums, universal life and investment-type product policy fees and other revenues	1,359	1,418	1,561
Other products
Segment Reporting Information [Line Items]
Total premiums, universal life and investment-type product policy fees and other revenues	$ 8	$ 11	$ 12