Pro Forma Results Reflecting Avid Health Acquisition (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
Business Acquisition, Pro Forma 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
Net Income													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
Avid Health, Inc
Business Acquisition, Pro Forma Information [Line Items]
Net Sales													2,921.9	2,749.3
Net Income													349.8	309.6
Net income per share-Basic													$ 2.50	$ 2.16
Net income per share-Diluted													$ 2.45	$ 2.12
Proforma, Net Sales													3,106.0	2,947.8
Proforma, Net Income													$ 374.9	$ 318.2
Proforma, Net Income per share - Basic													$ 2.68	$ 2.22
Proforma, Net Income per share - Diluted													$ 2.63	$ 2.18