Significant Accounting Policies - Summary of Expenses in Special Items (Detail) - USD ($) $ in Millions		12 Months Ended
	Jul. 13, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Biomet-related
Merger consideration compensation expense			$ 90.4
Retention plans			73.0
Consulting and professional fees		$ 220.4	167.4	$ 61.5
Employee termination benefits		50.8	101.0
Dedicated project personnel		79.8	62.3	0.4
Relocated facilities		19.1	5.6
Certain litigation matters		2.5
Contract terminations		39.9	95.0
Information technology integration		14.3	5.2
Intangible asset impairment		30.0
Loss/impairment on assets		13.0
Other		17.5	19.2
Total Biomet-related		487.3	619.1	61.9
Other
Merger consideration compensation expense			90.4
Consulting and professional fees		33.0	114.8	115.2
Employee termination benefits		7.0	1.9	0.9
Dedicated project personnel		17.3	31.8	50.4
Relocated facilities		0.2		0.7
Certain litigation matters		30.8	31.2	70.0
Contract terminations		2.9		1.8
Information technology integration		1.3	1.8
Intangible asset impairment		1.1		24.0
Loss/impairment on assets			3.8	6.0
Contingent consideration adjustments			2.4	0.6
Certain R&D agreements				4.5
Distributor acquisitions				0.6
Other		6.8	25.0	4.5
Total Other		124.5	212.7	279.2
Special items		611.8	$ 831.8	$ 341.1
LDR Holding Corporation [Member]
Biomet-related
Merger consideration compensation expense	$ 24.1	24.1
Other
Merger consideration compensation expense	$ 24.1	$ 24.1