Net Income Per Share (Tables)

12 Months Ended

Dec. 31, 2022

Earnings Per Share [Abstract]

Net Income Per Share

Basic and diluted net income per share are calculated using the treasury stock method.

	2022		2021		2020
Basic
Net income	$	2,020.1	$	1,864.4	$	2,030.4
Average shares outstanding	258.0		262.5		271.3
Basic net income 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	258.0		262.5		271.3
Stock options and other contingently issuable shares (1)	3.8		4.6		4.5
Average shares outstanding assuming dilution	261.8		267.1		275.8
Diluted net income per share	$	7.72	$	6.98	$	7.36

(1)    Stock options and other contingently issuable shares excludes 1.9 million, 0.9 million and 1.0 million shares at December 31, 2022, 2021 and 2020, respectively, due to their anti-dilutive effect.