Significant Accounting Policies - Summary of Expenses in Special Items (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Jul. 13, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Biomet-related
Merger consideration compensation expense					$ 164.1
Retention plans					73.0
Consulting and professional fees		$ 59.0	$ 28.0	$ 138.4	114.6
Employee termination benefits		7.1	14.2	14.3	79.1
Dedicated project personnel		21.9	36.8	64.8	45.9
Relocated facilities		9.5	1.6	17.5	2.5
Contract terminations		3.5	59.2	28.8	75.1
Information technology integration		4.8	1.1	9.3	1.1
Intangible asset impairment				28.0
Other		8.0	5.7	12.4	7.6
Total Biomet-related		113.8	146.6	313.5	563.0
Other
Merger consideration compensation expense					164.1
Consulting and professional fees		14.6	30.2	30.3	109.5
Employee termination benefits		3.2	1.1	3.2	1.9
Dedicated project personnel		8.2	6.4	11.5	28.9
Impairment/loss on disposal of assets				1.1	2.3
Relocated facilities				0.2
Certain litigation matters		3.7		3.7	20.3
Contract terminations		0.1		1.1
Information technology integration		0.8	1.8	1.1	1.8
Contingent consideration adjustments			0.1		2.4
Accelerated software amortization					1.5
Other		1.9	9.7	7.2	20.3
Total Other		56.6	49.3	83.5	188.9
Special items		170.4	$ 195.9	397.0	$ 751.9
LDR Holding Corporation [Member]
Biomet-related
Merger consideration compensation expense	$ 24.1	24.1		24.1
Other
Merger consideration compensation expense	$ 24.1	$ 24.1		$ 24.1