Investments (Realized Investment Gains Losses Net) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Gain (Loss) on Securities [Line Items]
Realized investment gains (losses), net	$ (3,369)	$ 4,024	$ (3,887)
Fixed maturities
Gain (Loss) on Securities [Line Items]
Realized investment gains (losses), net	(1,487)	1,939	729
Commercial mortgage and other loans
Gain (Loss) on Securities [Line Items]
Realized investment gains (losses), net	(133)	173	103
Investment real estate
Gain (Loss) on Securities [Line Items]
Realized investment gains (losses), net	83	108	(16)
LPs/LLCs
Gain (Loss) on Securities [Line Items]
Realized investment gains (losses), net	(120)	(14)	2
Derivatives
Gain (Loss) on Securities [Line Items]
Realized investment gains (losses), net	(1,713)	1,796	(4,715)
Other
Gain (Loss) on Securities [Line Items]
Realized investment gains (losses), net	$ 1	$ 22	$ 10