Consolidated Statement of Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Cumulative Effect Period Of Adoption Adjustment [Member]	Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect Period Of Adoption Adjustment [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Other Comprehensive Loss [Member] Cumulative Effect Period Of Adoption Adjustment [Member]	Noncontrolling Interests [Member]
Beginning balance at Dec. 31, 2017	$ 4,299.7		$ 181.0	$ 3,388.2	$ 1,221.8		$ (555.4)		$ 64.1
Beginning balance (in shares) at Dec. 31, 2017			181.0
Reclassification of the income tax effects with in accumulated other comprehensive loss related to the TCJA					6.6		(6.6)
Net earnings	675.9				633.5				42.4
Net purchase of subsidiary shares from noncontrolling interests	(0.7)			(5.0)					4.3
Dividends paid to noncontrolling interests	(38.0)								(38.0)
Net change in pension asset/liability, net of taxes	(10.3)						(10.3)
Foreign currency translation	(199.7)						(197.7)		(2.0)
Change in fair value of derivative instruments, net of taxes	(15.6)						(15.6)
Compensation expense related to stock option plan grants	13.7			13.7
Common stock issued in: purchase transactions	61.6		$ 0.8	60.8
Common stock issued in: purchase transactions (in shares)			0.8
Stock option plans	58.6		$ 1.6	57.0
Stock option plans (in shares)			1.6
Employee stock purchase plan	23.3		$ 0.4	22.9
Employee stock purchase plan (in shares)			0.4
Deferred compensation and restricted stock	15.8		$ 0.3	15.5
Deferred compensation and restricted (in shares)			0.3
Common stock repurchases	(11.3)		$ (0.1)	(11.2)
Common stock repurchases (in shares)			(0.1)
Cash dividends declared on common stock	(303.3)				(303.3)
Ending balance at Dec. 31, 2018	4,569.7	$ (2.4)	$ 184.0	3,541.9	1,558.6	$ (2.2)	(785.6)	$ (0.2)	70.8
Ending balance (in shares) at Dec. 31, 2018			184.0
Net earnings	715.8				668.8				47.0
Net purchase of subsidiary shares from noncontrolling interests	(15.1)								(15.1)
Dividends paid to noncontrolling interests	(43.0)								(43.0)
Net change in pension asset/liability, net of taxes	4.7						4.7
Foreign currency translation	44.5						44.2		0.3
Change in fair value of derivative instruments, net of taxes	(22.7)						(22.7)
Compensation expense related to stock option plan grants	14.0			14.0
Common stock issued in: purchase transactions	168.0		$ 1.9	166.1
Common stock issued in: purchase transactions (in shares)			1.9
Stock option plans	$ 73.7		$ 1.8	71.9
Stock option plans (in shares)	1.9		1.8
Employee stock purchase plan	$ 27.5		$ 0.3	27.2
Employee stock purchase plan (in shares)			0.3
Deferred compensation and restricted stock	4.7		$ 0.1	4.6
Deferred compensation and restricted (in shares)			0.1
Cash dividends declared on common stock	(323.9)				(323.9)
Ending balance at Dec. 31, 2019	$ 5,215.5		$ 188.1	3,825.7	1,901.3		(759.6)		60.0
Ending balance (in shares) at Dec. 31, 2019	188.1		188.1
Net earnings	$ 858.1				818.8				39.3
Net purchase of subsidiary shares from noncontrolling interests	(6.4)								(6.4)
Dividends paid to noncontrolling interests	(46.8)								(46.8)
Net change in pension asset/liability, net of taxes	0.4						0.4
Foreign currency translation	184.1						183.7		0.4
Change in fair value of derivative instruments, net of taxes	(68.1)						(68.1)
Compensation expense related to stock option plan grants	13.6			13.6
Common stock issued in: purchase transactions	309.1		$ 3.0	306.1
Common stock issued in: purchase transactions (in shares)			3.0
Stock option plans	$ 77.7		$ 1.8	75.9
Stock option plans (in shares)	1.8		1.8
Employee stock purchase plan	$ 34.2		$ 0.5	33.7
Employee stock purchase plan (in shares)			0.5
Deferred compensation and restricted stock	9.7		$ 0.3	9.4
Deferred compensation and restricted (in shares)			0.3
Cash dividends declared on common stock	(348.4)				(348.4)
Ending balance at Dec. 31, 2020	$ 6,232.7		$ 193.7	$ 4,264.4	$ 2,371.7		$ (643.6)		$ 46.5
Ending balance (in shares) at Dec. 31, 2020	193.7		193.7