Investments (Schedule Of Average Carrying Value Of Impaired Mortgage Loans On Real Estate) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Commercial [Member]
Information about impaired mortgage loans on real estate
Average carrying value for impaired mortgage loans on real estate	$ 15	$ 37	$ 18	$ 36