Total Net Sales by Product Group Category (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Net sales	$ 867.2	$ 830.0	$ 827.1	$ 799.3	$ 791.3	$ 758.0	$ 759.9	$ 740.3	$ 3,323.6	$ 3,049.5	$ 2,958.1
Vascular
Segment Reporting Information [Line Items]
Net sales									928.3	830.0	845.0
Urology
Segment Reporting Information [Line Items]
Net sales									835.9	776.6	757.8
Oncology
Segment Reporting Information [Line Items]
Net sales									910.9	857.1	812.4
Surgical Specialties
Segment Reporting Information [Line Items]
Net sales									555.1	499.0	455.1
Other Product Group
Segment Reporting Information [Line Items]
Net sales									$ 93.4	$ 86.8	$ 87.8