Retirement Benefit Plan - Changes in Fair Value of Plan Assets (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
U.S. and Puerto Rico [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Plan assets at fair market value - beginning of year	$ 402.2	$ 398.6
Actual return on plan assets	(16.6)	10.9
Employer contributions	0.8	2.7
Benefits paid	(12.3)	(10.0)
Plan assets at fair market value - end of year	374.1	402.2
Funded status	(1.0)	15.6
Foreign-based Defined Benefit Plans [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Plan assets at fair market value - beginning of year	385.4	372.3
Assets contributed by Biomet	129.4
Actual return on plan assets	(4.0)	38.0
Employer contributions	14.8	14.7
Employee contributions	16.9	18.5
Plan amendments	(0.2)
Benefits paid	(24.1)	(22.6)
Expenses paid	(0.3)	(0.2)
Translation gain (loss)	(12.3)	(35.3)
Plan assets at fair market value - end of year	505.6	385.4
Funded status	$ (63.0)	$ (38.3)