Stockholders' Equity and Stock-Based Compensation (Components of Share-Based Compensation Program) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Pretax compensation expense	$ 288	$ 306	$ 295
Income tax benefit	(59)	(65)	(61)
Total stock-based compensation expense, net of income taxes	229	241	234
RSUs/PSUs
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Pretax compensation expense	159	173	172
Income tax benefit	(33)	(38)	(36)
Total stock-based compensation expense, net of income taxes	126	135	136
Stock options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Pretax compensation expense	129	133	123
Income tax benefit	(26)	(27)	(25)
Total stock-based compensation expense, net of income taxes	$ 103	$ 106	$ 98