Segment Information - Summary of Net Sales by Product Category (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue from External Customer [Line Items]
Net Sales	$ 1,762.2	$ 1,106.0	$ 4,064.2	$ 3,450.4
Knees [Member]
Revenue from External Customer [Line Items]
Net Sales	632.0	443.3	1,564.8	1,398.9
Hips [Member]
Revenue from External Customer [Line Items]
Net Sales	434.5	315.6	1,066.8	988.3
S.E.T [Member]
Revenue from External Customer [Line Items]
Net Sales	371.0	208.6	811.1	634.1
Dental [Member]
Revenue from External Customer [Line Items]
Net Sales	103.4	53.9	220.2	176.0
Spine And CMF [Member]
Revenue from External Customer [Line Items]
Net Sales	147.7	51.0	256.1	151.5
Other [Member]
Revenue from External Customer [Line Items]
Net Sales	$ 73.6	$ 33.6	$ 145.2	$ 101.6