Investments (Schedule Of Average Carrying Value Of Impaired Mortgage Loans On Real Estate) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Information about impaired mortgage loans on real estate
Average carrying value for impaired mortgage loans on real estate	$ 32	$ 21
Interest income recognized on impaired mortgage loans on real estate
Interest income collected on impaired mortgage loans on real estate