Share-Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Shares
Outstanding, beginning (in shares)	2.8
Granted (in shares)	0.2
Exercised (in shares)	(0.7)
Outstanding, ending (in shares)	2.3	2.8
Exercisable (in shares)	1.9
Weighted Average Exercise Price
Outstanding (in dollars per share)	$ 177.60	$ 160.57
Granted (in dollars per share)	344.45
Exercised (in dollars per share)	144.68
Exercisable (in dollars per share)	$ 154.98
Weighted Average Remaining Contractual Term and Aggregate Intrinsic Value
Weighted Average Remaining Contractual Term, Outstanding	5 years 4 months 24 days	5 years 9 months 18 days
Weighted Average Remaining Contractual Term, Exercisable	4 years 9 months 18 days
Aggregate Intrinsic Value, Outstanding	$ 457	$ 419
Aggregate Intrinsic Value, Exercisable	422
Aggregate Intrinsic Value, Exercised	$ 136	$ 130	$ 219