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Investments (Summary Of Components Of Net Investment Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	$ 890	$ 1,208	$ 681
Funds held interest income (expense)	2	12	13
Future policy benefit reserve income (expense)		(1)	(1)
Gross investment income	892	1,219	692
Investment expenses	(62)	(54)	(50)
Net investment income	830	1,165	642
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	742	561	542
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	16	17	19
Short Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	28	1	5
Limited Partnerships [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	75	565	113
Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	$ 29	$ 63	$ 2

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