Schedule Of Quarterly Financial Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule Of Quarterly Financial Information [Line Items]
Net Sales	$ 809.7	$ 725.2	$ 696.4	$ 690.6	$ 731.1	$ 701.0	$ 674.9	$ 642.3	$ 656.9	$ 656.9	$ 640.9	$ 634.5	$ 2,921.9	$ 2,749.3	$ 2,589.2
Gross profit	358.4	327.5	303.0	302.5	316.5	309.9	300.0	288.1	292.4	289.0	290.9	285.5	1,291.4	1,214.5	1,157.8
Income from Operations	134.6	145.4	122.4	142.7	117.4	126.3	117.8	131.1	80.0	113.0	120.0	132.0	545.1	492.6	445.0
Equity in Earnings of Affiliates	1.6	2.4	2.4	2.5	1.7	2.9	3.2	2.2	1.4	0.8	1.6	1.2	8.9	10.0	5.0
Net Income	$ 80.8	$ 93.9	$ 79.3	$ 95.8	$ 63.8	$ 79.6	$ 82.6	$ 83.6	$ 47.0	$ 69.5	$ 74.2	$ 80.0	$ 349.8	$ 309.6	$ 270.7
Net income per share-Basic	$ 0.58	$ 0.67	$ 0.57	$ 0.67	$ 0.45	$ 0.55	$ 0.58	$ 0.59	$ 0.33	$ 0.49	$ 0.53	$ 0.57	$ 2.50	$ 2.16	$ 1.91
Net income per share-Diluted	$ 0.57	$ 0.66	$ 0.56	$ 0.66	$ 0.44	$ 0.54	$ 0.57	$ 0.58	$ 0.32	$ 0.48	$ 0.52	$ 0.56	$ 2.45	$ 2.12	$ 1.87