Segment Information - Summary of Net Sales by Product Category (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenue from External Customer [Line Items]
Net Sales	$ 1,832.8	$ 1,762.2	$ 5,670.8	$ 4,064.2
Knees [Member]
Revenue from External Customer [Line Items]
Net Sales	631.3	632.0	2,031.5	1,564.8
Hips [Member]
Revenue from External Customer [Line Items]
Net Sales	440.6	433.5	1,385.7	1,063.9
S.E.T [Member]
Revenue from External Customer [Line Items]
Net Sales	402.1	370.4	1,215.6	811.3
Dental [Member]
Revenue from External Customer [Line Items]
Net Sales	95.9	103.4	322.5	220.2
Spine and CMF [Member]
Revenue from External Customer [Line Items]
Net Sales	183.6	147.7	470.6	256.1
Other [Member]
Revenue from External Customer [Line Items]
Net Sales	$ 79.3	$ 75.2	$ 244.9	$ 147.9