Net Income Per Share - Schedule of Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income - basic and diluted	$ 8,075.3	$ 3,513.2	$ 2,115.8
Weighted average shares outstanding - basic (in shares)	105.7	107.6	109.2
Effect of dilutive securities:
Weighted average shares - diluted (in shares)	112.2	115.1	114.6
Net income per share - basic (in dollars per share)	$ 76.40	$ 32.65	$ 19.38
Net income per share - diluted (in dollars per share)	$ 71.97	$ 30.52	$ 18.46
Stock options
Effect of dilutive securities:
Effect of dilutive securities (in shares)	5.4	7.0	5.4
Restricted stock awards and restricted stock units
Effect of dilutive securities:
Effect of dilutive securities (in shares)	1.1	0.5	0.0