Stock Transactions And Stock-Based Compensation (Components Of Share-Based Compensation Program) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Pretax compensation expense	$ 218	$ 187	$ 159
Income tax benefit	(44)	(39)	(33)
Total stock-based compensation expense, net of income taxes	174	148	126
RSUs/PSUs
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Pretax compensation expense	129	114	97
Income tax benefit	(26)	(24)	(20)
Total stock-based compensation expense, net of income taxes	103	90	77
Stock options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Pretax compensation expense	89	73	62
Income tax benefit	(18)	(15)	(13)
Total stock-based compensation expense, net of income taxes	$ 71	$ 58	$ 49