Earnings Per Share - Schedule of Computation (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
Net income	$ 2,342.1	$ 2,711.7	$ 1,176.8
Basic weighted-average common shares outstanding (in shares)	257.7	259.8	256.7
Effect of potentially dilutive securities:
Employee stock purchase program (in shares)	0.0	0.1	0.1
Diluted weighted-average common shares outstanding (in shares)	259.9	263.4	260.7
Basic net income per common share (in dollars per share)	$ 9.09	$ 10.44	$ 4.58
Diluted net income per common share (in dollars per share)	$ 9.01	$ 10.29	$ 4.51
Stock options
Effect of potentially dilutive securities:
Share-based payment arrangements (in shares)	1.1	1.8	2.2
Restricted stock units (including PSUs)
Effect of potentially dilutive securities:
Share-based payment arrangements (in shares)	1.1	1.7	1.7