Equity Compensation Plans (Schedule Of Equity Based Compensation Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Stock options	$ 46	$ 43	$ 43
Restricted stock/RSUs	53	58	62
Total equity-based compensation expense, net of tax	$ 99	$ 101	$ 105