Earnings Per Share - Schedule of Computation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share
Net income	$ 810.5	$ 67.0	$ 1,572.6	$ 720.1
Basic weighted-average common shares outstanding (in shares)	255.9	259.0	255.5	259.2
Effect of potentially dilutive securities:
Employee stock purchase program (in shares)	0.0	0.0	0.0	0.0
Diluted weighted-average common shares outstanding (in shares)	258.7	261.0	258.3	261.5
Basic net income per common share (in dollars per share)	$ 3.17	$ 0.26	$ 6.15	$ 2.78
Diluted net income per common share (in dollars per share)	$ 3.13	$ 0.26	$ 6.09	$ 2.75
Stock options
Effect of potentially dilutive securities:
Share-based payment arrangements (in shares)	1.4	1.1	1.4	1.2
Restricted stock units (including PSUs)
Effect of potentially dilutive securities:
Share-based payment arrangements (in shares)	1.4	0.9	1.4	1.1