Segment Data - Summary of Net Sales by Product Category (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenue from External Customer [Line Items]
Net Sales	$ 1,222.9	$ 1,106.0	$ 1,182.9	$ 1,161.5	$ 1,240.7	$ 1,074.3	$ 1,169.5	$ 1,138.9	$ 4,673.3	$ 4,623.4	$ 4,471.7
Knees [Member]
Revenue from External Customer [Line Items]
Net Sales									1,965.8	1,909.9	1,833.8
Hips [Member]
Revenue from External Customer [Line Items]
Net Sales									1,326.4	1,330.5	1,342.0
Extremities [Member]
Revenue from External Customer [Line Items]
Net Sales									204.3	193.8	173.8
Reconstructive [Member]
Revenue from External Customer [Line Items]
Net Sales									3,496.5	3,434.2	3,349.6
Dental [Member]
Revenue from External Customer [Line Items]
Net Sales									242.8	239.3	237.7
Trauma [Member]
Revenue from External Customer [Line Items]
Net Sales									316.7	315.6	307.9
Spine [Member]
Revenue from External Customer [Line Items]
Net Sales									207.2	202.3	208.9
Surgical and other [Member]
Revenue from External Customer [Line Items]
Net Sales									$ 410.1	$ 432.0	$ 367.6