Segment Information - Summary of Net Sales by Product Category (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue from External Customer [Line Items]
Net Sales	$ 1,934.0	$ 1,167.6	$ 3,838.0	$ 2,302.0
Knees [Member]
Revenue from External Customer [Line Items]
Net Sales	696.9	468.9	1,400.2	932.8
Hips [Member]
Revenue from External Customer [Line Items]
Net Sales	477.2	319.0	945.1	630.4
S.E.T [Member]
Revenue from External Customer [Line Items]
Net Sales	412.4	222.5	813.5	440.9
Dental [Member]
Revenue from External Customer [Line Items]
Net Sales	118.0	61.0	226.6	116.8
Spine and CMF [Member]
Revenue from External Customer [Line Items]
Net Sales	145.8	58.9	287.0	108.4
Other [Member]
Revenue from External Customer [Line Items]
Net Sales	$ 83.7	$ 37.3	$ 165.6	$ 72.7