Total Net Sales by Product Group Category (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Net sales	$ 967.1	$ 941.9	$ 931.5	$ 873.5	$ 870.8	$ 865.7	$ 859.8	$ 819.7	$ 3,714.0	$ 3,416.0	$ 3,323.6
Vascular
Segment Reporting Information [Line Items]
Net sales									1,014.9	970.3	928.3
Urology
Segment Reporting Information [Line Items]
Net sales									951.8	845.0	835.9
Oncology
Segment Reporting Information [Line Items]
Net sales									1,012.1	936.9	910.9
Surgical Specialties
Segment Reporting Information [Line Items]
Net sales									637.3	572.3	555.1
Other Product Group
Segment Reporting Information [Line Items]
Net sales									$ 97.9	$ 91.5	$ 93.4