Stockholders' Equity and Stock-Based Compensation (Components of Share-Based Compensation Program) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Pretax compensation expense	$ 306	$ 295	$ 184
Income tax benefit	(65)	(61)	(39)
Total stock-based compensation expense, net of income taxes	241	234	145
RSUs/PSUs
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Pretax compensation expense	173	172	109
Income tax benefit	(38)	(36)	(23)
Total stock-based compensation expense, net of income taxes	135	136	86
Stock options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Pretax compensation expense	133	123	75
Income tax benefit	(27)	(25)	(16)
Total stock-based compensation expense, net of income taxes	$ 106	$ 98	$ 59