Investments (Net Investment Gains/Losses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Investment [Line Items]
Net (losses) gains on investments	$ (54)	$ (73)	$ (482)	$ 48
Fixed Maturities [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Realized Gain	8	30	44	133
Debt Securities, Available-for-sale, Realized Loss	(99)	(8)	(353)	(32)
Impairment (losses) recoveries recognized in income	(5)	0	(25)	1
Debt Securities, Available-for-sale, Realized Gain (Loss)	(96)	22	(334)	102
Equity Securities [Member]
Investment [Line Items]
Unrealized (losses) gains recognized on equity securities still held at the end of the period	(43)	(4)	(192)	4
Net realized gains (losses) recognized on equity securities sold during the period	4	(1)	(20)	(57)
Net losses on equity securities	(39)	(5)	(212)	(53)
Other Investments [Member]
Investment [Line Items]
Gross gains	95	2	126	9
Gross losses	(2)	(93)	(45)	(5)
Impairment (losses) recoveries recognized in income	(12)	1	(17)	(5)
Net losses (gains) on other investments	$ 81	$ (90)	$ 64	$ (1)