Investments (Schedule Of Average Carrying Value Of Impaired Mortgage Loans On Real Estate) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Information about impaired mortgage loans on real estate
Average carrying value for impaired mortgage loans on real estate	$ 34	$ 13	$ 25	$ 16