Total Net Sales by Product Group Category (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Net sales	$ 859.8	$ 827.1	$ 1,679.5	$ 1,626.4
Vascular
Segment Reporting Information [Line Items]
Net sales	248.6	233.0	480.5	452.2
Urology
Segment Reporting Information [Line Items]
Net sales	209.2	207.1	414.8	408.5
Oncology
Segment Reporting Information [Line Items]
Net sales	235.2	224.7	459.8	443.7
Surgical Specialties
Segment Reporting Information [Line Items]
Net sales	143.8	139.3	279.7	274.5
Other Product Group
Segment Reporting Information [Line Items]
Net sales	$ 23.0	$ 23.0	$ 44.7	$ 47.5