Condensed Consolidated Statements of Changes in Stockholders' Equity (unaudited) - USD ($) $ in Millions	Total	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive loss	Treasury stock
Balance at beginning of period at Dec. 31, 2020	$ 10,479.8	$ 1.1	$ 2,097.5	$ 8,546.2	$ (147.0)	$ (18.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	575.3			575.3
Stock option exercises	61.1		61.1
Treasury stock sold	8.2		8.0			0.2
Currency translation adjustments	31.9				31.9
Stock-based compensation	67.2		67.2
Restricted stock activity	(15.9)		(15.9)
Dividends declared	(118.4)			(118.4)
Balance at end of period at Jun. 30, 2021	11,089.2	1.1	2,217.9	9,003.1	(115.1)	(17.8)
Balance at beginning of period at Mar. 31, 2021	10,765.7	1.1	2,138.9	8,776.0	(132.4)	(17.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	286.3			286.3
Stock option exercises	41.9		41.9
Treasury stock sold	3.5		3.4			0.1
Currency translation adjustments	17.3				17.3
Stock-based compensation	34.8		34.8
Restricted stock activity	(1.1)		(1.1)
Dividends declared	(59.2)			(59.2)
Balance at end of period at Jun. 30, 2021	11,089.2	1.1	2,217.9	9,003.1	(115.1)	(17.8)
Balance at beginning of period at Dec. 31, 2021	11,563.8	1.1	2,307.8	9,455.6	(183.1)	(17.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	2,289.3			2,289.3
Stock option exercises	62.9		62.9
Cash settlement of share-based awards in connection with disposition of discontinued operations	(11.1)		(11.1)
Treasury stock sold	8.5		8.3			0.2
Currency translation adjustments	(104.7)				(104.7)
Stock-based compensation	71.2		71.2
Restricted stock activity	(22.0)		(22.0)
Dividends declared	(131.4)			(131.4)
Balance at end of period at Jun. 30, 2022	13,726.5	1.1	2,417.1	11,613.5	(287.8)	(17.4)
Balance at beginning of period at Mar. 31, 2022	13,551.9	1.1	2,363.9	11,410.4	(206.0)	(17.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	268.8			268.8
Stock option exercises	24.2		24.2
Treasury stock sold	3.0		2.9			0.1
Currency translation adjustments	(81.8)				(81.8)
Stock-based compensation	30.4		30.4
Restricted stock activity	(4.3)		(4.3)
Dividends declared	(65.7)			(65.7)
Balance at end of period at Jun. 30, 2022	$ 13,726.5	$ 1.1	$ 2,417.1	$ 11,613.5	$ (287.8)	$ (17.4)