Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Basic
Net income	$ 2,020.1	$ 1,864.4	$ 2,030.4
Average shares outstanding (in shares)	258.0	262.5	271.3
Basic net income per share (in dollars per share)	$ 7.83	$ 7.10	$ 7.48
Diluted
Net income	$ 2,020.1	$ 1,864.4	$ 2,030.4
Average shares outstanding assuming dilution:
Average shares outstanding (in shares)	258.0	262.5	271.3
Stock options and other contingently issuable shares (in shares)	3.8	4.6	4.5
Average shares outstanding assuming dilution (in shares)	261.8	267.1	275.8
Diluted net income per share (in dollars per share)	$ 7.72	$ 6.98	$ 7.36
Stock options and other contingently issuable shares with anti-dilutive effects (in shares)	1.9	0.9	1.0