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, 2012	$ 1,672.8	$ 125.6	$ 1,055.4	$ 510.4	$ (32.8)	$ 14.2
Beginning Balance (in shares) at Dec. 31, 2012		125.6
Net earnings	284.6			268.6		16.0
Dividends paid to noncontrolling interests	(21.9)					(21.9)
Net change in pension asset/liability, net of taxes	26.8				26.8
Foreign currency translation	22.6				1.6	21.0
Change in fair value of derivative instruments, net of taxes	1.8				1.8
Compensation expense related to stock option plan grants	7.7		7.7
Tax impact from issuance of common stock	7.5		7.5
Common stock issued in:
Purchase transactions	232.2	$ 5.2	227.0
Purchase transactions (in shares)		5.2
Stock option plans	$ 61.8	$ 2.3	59.5
Stock option plans (in shares)	2.3	2.3
Employee stock purchase plan	$ 10.2	$ 0.3	9.9
Employee stock purchase plan (in shares)		0.3
Deferred compensation and restricted stock	(13.0)	$ 0.1	(13.1)
Deferred compensation and restricted stock (in shares)		0.1
Stock issuance under dribble-out program	4.3	$ 0.1	4.2
Stock issuance under dribble-out program (in shares)		0.1
Cash dividends declared on common stock	(182.6)			(182.6)
Ending Balance at Dec. 31, 2013	2,114.8	$ 133.6	1,358.1	596.4	(2.6)	29.3
Ending Balance (in shares) at Dec. 31, 2013		133.6
Net earnings	327.5			303.4		24.1
Net purchase of subsidiary shares from noncontrolling interests	49.3					49.3
Dividends paid to noncontrolling interests	(34.4)					(34.4)
Net change in pension asset/liability, net of taxes	(18.6)				(18.6)
Foreign currency translation	(231.0)				(238.4)	7.4
Change in fair value of derivative instruments, net of taxes	(1.0)				(1.0)
Compensation expense related to stock option plan grants	9.5		9.5
Tax impact from issuance of common stock	6.9		6.9
Common stock issued in:
Purchase transactions	299.3	$ 6.5	292.8
Purchase transactions (in shares)		6.5
Stock option plans	$ 44.2	$ 1.6	42.6
Stock option plans (in shares)	1.6	1.6
Employee stock purchase plan	$ 12.4	$ 0.3	12.1
Employee stock purchase plan (in shares)		0.3
Deferred compensation and restricted stock	8.5	$ 0.1	8.4
Deferred compensation and restricted stock (in shares)		0.1
Stock issuance under dribble-out program	29.0	$ 0.6	28.4
Stock issuance under dribble-out program (in shares)		0.6
Stock issuance from public offering	911.4	$ 21.9	889.5
Stock issuance from public offering (in shares)		21.9
Other compensation expense	1.1		1.1
Cash dividends declared on common stock	(223.8)			(223.8)
Ending Balance at Dec. 31, 2014	3,305.1	$ 164.6	2,649.4	676.0	(260.6)	75.7
Ending 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:
Purchase transactions	346.2	$ 7.3	338.9
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