Segment Information - Summary of Net Sales by Product Category (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenue from External Customer [Line Items]
Net Sales	$ 1,818.1	$ 1,832.8	$ 5,749.8	$ 5,670.8
Knees [Member]
Revenue from External Customer [Line Items]
Net Sales	623.7	631.5	2,005.9	2,031.7
Hips [Member]
Revenue from External Customer [Line Items]
Net Sales	434.5	440.6	1,380.0	1,385.7
S.E.T [Member]
Revenue from External Customer [Line Items]
Net Sales	406.6	401.8	1,254.5	1,215.0
Dental [Member]
Revenue from External Customer [Line Items]
Net Sales	92.9	95.9	311.1	322.5
Spine and CMF [Member]
Revenue from External Customer [Line Items]
Net Sales	184.9	183.7	565.2	470.7
Other [Member]
Revenue from External Customer [Line Items]
Net Sales	$ 75.5	$ 79.3	$ 233.1	$ 245.2