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Investments (Summary Of Gross Gains (Losses) From Sales Of Fixed Maturity And Equity Securities) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales of securities	$ 39
Proceeds from sales of equity securities	2,217	990	376
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales of securities	1,403	1,916	1,951
Gross gains from sales	40	72	80
Gross losses from sales	(127)	(55)	(85)
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales of equity securities	2,217	990	376
Gross gains from sales	165	42	37
Gross losses from sales	$ (53)	$ (15)	$ (46)

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Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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-Publisher FASB
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