Statement of Changes in Equity and Accumulated Other Comprehensive Income (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			$ 1,442.2	$ 1,307.7
Net earnings	71.9	65.4	121.4	109.9
(Earnings) loss attributable to noncontrolling interest, net of tax	(0.6)	(0.5)	(1.0)	(1.0)
Dividends declared			(82.6)	(78.6)
Treasury stock purchased			(90.0)	(9.0)
Treasury stock issued			46.2	11.4
Foreign currency translation adjustments	(11.2)	(23.6)	(27.5)	(7.4)
Cash flow hedges, net of tax	0.1	(7.2)	0.9	(4.3)
Defined benefit pension plans, net of tax	1.1	1.0	2.5	1.8
Stock options and benefit plan transactions, net of tax			20.6	15.5
Ending balance	1,433.7	1,347.0	1,433.7	1,347.0
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			2,109.6	2,027.4
Net earnings			121.4	109.9
(Earnings) loss attributable to noncontrolling interest, net of tax			(1.0)	(1.0)
Dividends declared			(83.7)	(80.7)
Ending balance	2,146.3	2,055.6	2,146.3	2,055.6
Common Stock & Additional Contributed Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			460.6	458.9
Dividends declared			1.1	2.1
Treasury stock issued			(12.2)	(19.3)
Stock options and benefit plan transactions, net of tax			20.6	15.5
Ending balance	470.1	457.2	470.1	457.2
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			(1,206.7)	(1,254.3)
Treasury stock purchased			(90.0)	(9.0)
Treasury stock issued			58.4	30.7
Ending balance	(1,238.3)	(1,232.6)	(1,238.3)	(1,232.6)
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			7.7	10.5
(Earnings) loss attributable to noncontrolling interest, net of tax			1.0	1.0
Foreign currency translation adjustments			0.1	(0.1)
Ending balance	8.8	11.4	8.8	11.4
Accumulated Other Comprehensive Income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			71.0	65.2
Foreign currency translation adjustments			(27.6)	(7.3)
Cash flow hedges, net of tax			0.9	(4.3)
Defined benefit pension plans, net of tax			2.5	1.8
Ending balance	$ 46.8	$ 55.4	$ 46.8	$ 55.4