Revision of Prior Period Financial Statements - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2015	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Biomet merger consideration compensation expense			$ 90.4	$ 0.0	$ 0.0
Biomet acquisition, net of acquired cash			7,760.1
Immaterial Interim Periods Error Correction Adjustments [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Biomet merger consideration compensation expense			$ 52.8
Biomet acquisition, net of acquired cash	$ 52.8	$ 52.8