Income Taxes (Schedule Of Income Tax Expense/(Benefit)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
U.S. federal	$ (89)	$ (3,968)	$ (308)
Non-U.S.	147	148	169
U.S. state	42	21	(161)
Total Current Income Tax Expense (Benefit)	100	(3,799)	(300)
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
U.S. federal	(855)	652	(953)
Non-U.S.	(12)		(3)
U.S. state	24	612	(367)
Total deferred	(843)	1,264	(1,323)
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Total income tax (benefit)/expense	$ (743)	$ (2,535)	$ (1,623)