Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions		9 Months Ended
	Jun. 24, 2015	Sep. 30, 2015
Business And Significant Accounting Policies [Line Items]
Fair value of merger consideration transferred, classified as compensation expense		$ 164.1
Merger retention plans, expenses recognized		73.0
Reclassification of other current assets to debt		8.4
Reclassification of other assets to debt		62.5
Employee Severance [Member] | Expect to Incur Through 2018 [Member]
Business And Significant Accounting Policies [Line Items]
Restructuring Cost		170.0
Contract Terminations [Member] | Expect to Incur Through 2018 [Member]
Business And Significant Accounting Policies [Line Items]
Restructuring Cost		130.0
LVB Acquisition Inc [Member]
Business And Significant Accounting Policies [Line Items]
Fair value of merger consideration transferred, classified as compensation expense	$ 164.1
Merger retention plans, expenses recognized		73.0
Deferred Compensation, Share-based Payments [Member] | LVB Acquisition Inc [Member]
Business And Significant Accounting Policies [Line Items]
Fair value of merger consideration transferred, classified as compensation expense		$ 164.1