Stockholders' Equity (Narrative) (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	[1]	Sep. 30, 2024	Sep. 30, 2023		Dec. 31, 2013
Equity [Abstract]
Stock repurchase program, authorized amount (up to)							$ 8,100
Number of shares purchased (in shares)				0.1	2.9
Cost of shares repurchased during the period	$ 8	$ 491		$ 8	$ 637	[2]
Treasury stock value acquired				8	$ 633
Remaining authorized repurchase amount	$ 794			$ 794

[1] Amount includes excise taxes due under the Inflation Reduction Act of 2022.

[2] Amount includes excise taxes due under the Inflation Reduction Act of 2022.