Consolidated Statement of Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Earnings (Loss) [Member]	Noncontrolling Interests [Member]
Beginning Balance at Dec. 31, 2014	$ 3,305.1	$ 164.6	$ 2,649.4	$ 676.0	$ (260.6)	$ 75.7
Beginning Balance (in shares) at Dec. 31, 2014		164.6
Net earnings	389.1			356.8		32.3
Net purchase of subsidiary shares from noncontrolling interests	(15.0)					(15.0)
Dividends paid to noncontrolling interests	(36.7)					(36.7)
Net change in pension asset/liability, net of taxes	1.3				1.3
Foreign currency translation	(267.5)				(261.1)	(6.4)
Change in fair value of derivative instruments, net of taxes	(2.1)				(2.1)
Compensation expense related to stock option plan grants	11.2		11.2
Tax impact from issuance of common stock	5.3		5.3
Common stock issued in: Thirty-Nine purchase transactions	346.2	$ 7.3	338.9
Common stock issued in: nine purchase transactions (In Shares)		7.3
Stock option plans	$ 40.4	$ 1.4	39.0
Stock option plans (in shares)	1.4	1.4
Employee stock purchase plan	$ 13.8	$ 0.3	13.5
Employee stock purchase plan (in shares)		0.3
Deferred compensation and restricted stock	6.2	$ 0.2	6.0
Deferred compensation and restricted stock (in shares)		0.2
Stock issuance under dribble-out program	149.2	$ 3.1	146.1
Stock issuance under dribble-out program (in shares)		3.1
Cash dividends declared on common stock	(258.3)			(258.3)
Ending Balance at Dec. 31, 2015	3,688.2	$ 176.9	3,209.4	774.5	(522.5)	49.9
Ending Balance (in shares) at Dec. 31, 2015		176.9
Net earnings	445.0			414.4		30.6
Net purchase of subsidiary shares from noncontrolling interests	8.3					8.3
Dividends paid to noncontrolling interests	(34.1)					(34.1)
Net change in pension asset/liability, net of taxes	(4.4)				(4.4)
Foreign currency translation	(227.3)				(231.8)	4.5
Change in fair value of derivative instruments, net of taxes	(4.9)				(4.9)
Compensation expense related to stock option plan grants	14.7		14.7
Tax impact from issuance of common stock	6.5		6.5
Common stock issued in: Thirty-Nine purchase transactions	$ 91.6	$ 2.0	89.6
Common stock issued in: nine purchase transactions (In Shares)	91.6	2.0
Stock option plans	$ 29.7	$ 1.1	28.6
Stock option plans (in shares)	1.1	1.1
Employee stock purchase plan	$ 15.9	$ 0.4	15.5
Employee stock purchase plan (in shares)		0.4
Deferred compensation and restricted stock	0.1	$ 0.2	(0.1)
Deferred compensation and restricted stock (in shares)		0.2
Stock issuance under dribble-out program	(101.0)	$ (2.3)	(98.7)
Stock issuance under dribble-out program (in shares)		(2.3)
Cash dividends declared on common stock	(272.5)			(272.5)
Ending Balance at Dec. 31, 2016	3,655.8	$ 178.3	3,265.5	916.4	(763.6)	59.2
Ending Balance (in shares) at Dec. 31, 2016		178.3
Net earnings	499.2			463.1		36.1
Net purchase of subsidiary shares from noncontrolling interests	(2.1)					(2.1)
Dividends paid to noncontrolling interests	(34.4)					(34.4)
Net change in pension asset/liability, net of taxes	4.3				4.3
Foreign currency translation	184.3				183.4	0.9
Change in fair value of derivative instruments, net of taxes	16.0				16.0
Compensation expense related to stock option plan grants	17.3		17.3
Common stock issued in: Thirty-Nine purchase transactions	60.6	$ 1.0	59.6
Common stock issued in: nine purchase transactions (In Shares)		1.0
Stock option plans	$ 41.1	$ 1.3	39.8
Stock option plans (in shares)	1.3	1.3
Employee stock purchase plan	$ 19.3	$ 0.4	18.9
Employee stock purchase plan (in shares)		0.4
Deferred compensation and restricted stock	4.8	$ 0.3	4.5
Deferred compensation and restricted stock (in shares)		0.3
Common stock repurchases	(17.7)	$ (0.3)	(17.4)
Common stock repurchases (in shares)		(0.3)
Cash dividends declared on common stock	(283.6)			(283.6)
Ending Balance at Dec. 31, 2017	$ 4,164.9	$ 181.0	$ 3,388.2	$ 1,095.9	$ (559.9)	$ 59.7
Ending Balance (in shares) at Dec. 31, 2017		181.0