Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator:
Net income	$ 761	$ 437
Denominator:
Basic: Weighted-average common shares outstanding (in shares)	113.7	119.8
Effect of potentially dilutive nonqualified stock options and other share-based awards (in shares)	2.5	2.4
Diluted: Weighted-average common shares outstanding (in shares)	116.2	122.2
Earnings per share:
Basic (in dollars per share)	$ 6.69	$ 3.65
Diluted (in dollars per share)	$ 6.55	$ 3.58
Options excluded from earnings per share calculation due to their anti-dilutive effect (in shares)	0.2	0.3