Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Numerator:
Net income	$ 2,559	$ 2,760	$ 1,534
Net income	$ 2,559	$ 2,760	$ 1,534
Denominator:
Basic: Weighted-average common shares outstanding (in shares)	111.3	117.3	123.8
Effect of potentially dilutive nonqualified stock options and other share-based awards (in shares)	2.4	2.7	1.9
Diluted: Weighted-average common shares outstanding (in shares)	113.7	120.0	125.7
Earnings Per Share, Basic:
Basic (in dollars per share)	$ 22.99	$ 23.53	$ 12.39
Earnings Per Share, Diluted:
Diluted (in dollars per share)	$ 22.51	$ 23.00	$ 12.20
Options excluded from earnings per share calculation due to their anti-dilutive effect (in shares)	0.2	0.0	0.0