Net Income Per Share - Schedule of Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income - basic and diluted	$ 973.5	$ 1,115.2
Weighted average shares - basic (in shares)	106.8	105.4
Weighted average shares - diluted (in shares)	113.1	110.5
Net income per share - basic (in dollars per share)	$ 9.12	$ 10.58
Net income per share - diluted (in dollars per share)	$ 8.61	$ 10.09
Stock options
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Effect of dilutive securities (in shares)	5.0	4.5
Restricted stock awards and restricted stock units
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Effect of dilutive securities (in shares)	1.3	0.6