Segment Information - Summary of Net Sales by Product Category (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenue from External Customer [Line Items]
Net Sales	$ 1,954.4	$ 1,934.0	$ 3,931.7	$ 3,838.0
Knees [Member]
Revenue from External Customer [Line Items]
Net Sales	680.4	697.0	1,382.2	1,400.2
Hips [Member]
Revenue from External Customer [Line Items]
Net Sales	469.8	477.2	945.5	945.1
S.E.T [Member]
Revenue from External Customer [Line Items]
Net Sales	422.8	412.2	847.9	813.2
Dental [Member]
Revenue from External Customer [Line Items]
Net Sales	110.4	118.0	218.2	226.6
Spine and CMF [Member]
Revenue from External Customer [Line Items]
Net Sales	194.0	145.8	380.3	287.0
Other [Member]
Revenue from External Customer [Line Items]
Net Sales	$ 77.0	$ 83.8	$ 157.6	$ 165.9