Revenue Recognition - Schedule of Net Sales by Product Category (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales	$ 1,836.7	$ 1,813.1	$ 5,861.9	$ 5,735.0
Knees [Member]
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales	627.9	622.9	2,044.2	2,003.7
Hips [Member]
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales	444.8	432.8	1,423.7	1,374.6
S.E.T [Member]
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales	414.6	404.8	1,290.7	1,249.4
Dental [Member]
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales	92.3	92.9	306.8	311.1
Spine and CMF [Member]
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales	184.9	184.5	566.2	564.1
Other [Member]
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales	$ 72.2	$ 75.2	$ 230.3	$ 232.1