Investments (Credit Losses Recognized in Earnings on Fixed Maturity Securities Held by the Company) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance, beginning of period	$ 31	$ 20
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment	42	27
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold	(39)	(13)
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Change in Status	4	0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses	(7)	(3)
Balance, end of period	37	31
Corporate Debt Securities [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance, beginning of period	26	17
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment	31	21
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold	(32)	(10)
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Change in Status	4	0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses	(6)	(2)
Balance, end of period	27	26
Asset-backed Securities [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance, beginning of period	0	0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment	10	0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold	0	0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Change in Status	0	0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses	0	0
Balance, end of period	10	0
Commercial Mortgage Backed Securities [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance, beginning of period	1	3
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment	0	1
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold	0	(2)
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Change in Status	0	0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses	(1)	(1)
Balance, end of period	0	1
Foreign Government Debt [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance, beginning of period	4	0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment	1	5
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold	(7)	(1)
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Change in Status	0	0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses	(2)	0
Balance, end of period	$ 0	$ 4