Segment Information - Summary of Net Sales by Product Category (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenue from External Customer [Line Items]
Net Sales	$ 1,134.4	$ 1,161.5
Knees [Member]
Revenue from External Customer [Line Items]
Net Sales	487.3	487.9
Hips [Member]
Revenue from External Customer [Line Items]
Net Sales	312.2	331.7
Extremities [Member]
Revenue from External Customer [Line Items]
Net Sales	52.2	52.1
Reconstructive [Member]
Revenue from External Customer [Line Items]
Net Sales	851.7	871.7
Dental [Member]
Revenue from External Customer [Line Items]
Net Sales	55.8	61.0
Trauma [Member]
Revenue from External Customer [Line Items]
Net Sales	79.4	79.7
Spine [Member]
Revenue from External Customer [Line Items]
Net Sales	49.5	48.3
Surgical and other [Member]
Revenue from External Customer [Line Items]
Net Sales	$ 98.0	$ 100.8