Segment Information - Summary of Net Sales by Product Category (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenue from External Customer [Line Items]
Net Sales	$ 1,106.0	$ 1,074.3	$ 3,450.4	$ 3,382.7
Knees [Member]
Revenue from External Customer [Line Items]
Net Sales	461.4	434.5	1,447.2	1,386.5
Hips [Member]
Revenue from External Customer [Line Items]
Net Sales	315.6	308.3	988.3	977.5
Extremities [Member]
Revenue from External Customer [Line Items]
Net Sales	46.8	45.5	150.4	141.9
Reconstructive [Member]
Revenue from External Customer [Line Items]
Net Sales	823.8	788.3	2,585.9	2,505.9
Dental [Member]
Revenue from External Customer [Line Items]
Net Sales	53.9	55.1	176.0	176.2
Trauma [Member]
Revenue from External Customer [Line Items]
Net Sales	77.8	78.5	236.3	234.6
Spine [Member]
Revenue from External Customer [Line Items]
Net Sales	51.0	48.0	151.5	149.9
Surgical and other [Member]
Revenue from External Customer [Line Items]
Net Sales	$ 99.5	$ 104.4	$ 300.7	$ 316.1