Significant Accounting Policies - Summary of Expenses in Special Items (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Biomet-related
Consulting and professional fees	$ 36.1	$ 24.2
Employee termination benefits	4.1	0.4
Dedicated project personnel	21.7	1.0
Relocated facilities	7.1
Contract terminations	10.1
Information technology integration	1.4
Other	4.0	0.2
Other
Consulting and professional fees	6.9	39.7
Employee termination benefits		0.1
Dedicated project personnel	1.8	12.4
Impairment/loss on disposal of assets		2.3
Relocated facilities	0.2	0.5
Information technology integration	0.1
Contingent consideration adjustments		2.3
Accelerated software amortization		1.5
Other	0.6	2.2
Special items	$ 94.1	$ 86.8