Statement of Changes in Equity and Accumulated Other Comprehensive Income (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			$ 1,442.2	$ 1,307.7
Net earnings	72.0	66.6	193.4	176.5
(Earnings) loss attributable to noncontrolling interest, net of tax	(0.7)	(0.8)	(1.7)	(1.8)
Dividends declared			(126.4)	(119.4)
Treasury stock purchased			(123.1)	(24.1)
Treasury stock issued			53.1	29.5
Foreign currency translation adjustments	21.2	19.4	(6.3)	12.0
Cash flow hedges, net of tax	1.6	(0.2)	2.5	(4.5)
Defined benefit pension plans, net of tax	0.4	0.7	2.9	2.5
Stock options and benefit plan transactions, net of tax			25.4	20.6
Ending balance	1,463.7	1,400.8	1,463.7	1,400.8
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			2,109.6	2,027.4
Net earnings			193.4	176.5
(Earnings) loss attributable to noncontrolling interest, net of tax			(1.7)	(1.8)
Dividends declared			(127.3)	(122.7)
Ending balance	2,174.0	2,079.4	2,174.0	2,079.4
Common Stock & Additional Contributed Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			460.6	458.9
Dividends declared			2.2	3.3
Treasury stock issued			(12.8)	(24.8)
Stock options and benefit plan transactions, net of tax			25.4	20.6
Ending balance	475.4	458.0	475.4	458.0
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			(1,206.7)	(1,254.3)
Treasury stock purchased			(123.1)	(24.1)
Treasury stock issued			65.9	54.3
Ending balance	(1,263.9)	(1,224.1)	(1,263.9)	(1,224.1)
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			7.7	10.5
(Earnings) loss attributable to noncontrolling interest, net of tax			1.7	1.8
Dividends declared			(1.3)
Foreign currency translation adjustments			0.1	0
Ending balance	8.2	12.3	8.2	12.3
Accumulated Other Comprehensive Income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			71.0	65.2
Foreign currency translation adjustments			(6.4)	12.0
Cash flow hedges, net of tax			2.5	(4.5)
Defined benefit pension plans, net of tax			2.9	2.5
Ending balance	$ 70.0	$ 75.2	$ 70.0	$ 75.2