Biomet Merger - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
	Jun. 24, 2015	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Mar. 31, 2015
Business Acquisition [Line Items]
Business acquisition liability incurred	$ 2,740.0
Gain on divestiture of assets		$ 18.9		$ 18.9
Senior unsecured term loan and notes		8,950.0		8,950.0
Biomet merger consideration compensation expense		164.1		164.1
Net assets acquired	$ 11,866.2
Operating profit		(129.5)	$ 260.9	145.4	$ 561.0
Merger retention plans, expenses recognized		73.0		73.0
Technology [Member]
Business Acquisition [Line Items]
Weighted-average amortization period	20 years
Customer Relationships [Member]
Business Acquisition [Line Items]
Weighted-average amortization period	24 years
LVB Acquisition Inc [Member]
Business Acquisition [Line Items]
Total consideration	$ 12,030.3
Consideration paid, cash	$ 8,307.6
Consideration paid, shares	32.7
Consideration paid, common stock value	$ 3,722.7
Consideration paid, common stock price	$ 113.83
Biomet merger consideration compensation expense	$ 164.1
Net assets acquired	$ 11,866.2
Merger retention plans, expenses recognized				73.0
Biomet [Member]
Business Acquisition [Line Items]
Operating profit		59.9		(288.2)
Operating Income (Loss) [Member] | LVB Acquisition Inc [Member]
Business Acquisition [Line Items]
Biomet merger consideration compensation expense				164.1
Merger retention plans, expenses recognized				73.0
Operating Expense [Member] | LVB Acquisition Inc [Member]
Business Acquisition [Line Items]
Biomet merger consideration compensation expense			164.1		164.1
Merger retention plans, expenses recognized			$ 73.0		$ 73.0
Senior Notes [Member] | LVB Acquisition Inc [Member]
Business Acquisition [Line Items]
Business acquisition liability incurred		2,740.0		2,740.0
Senior Unsecured Term Loan [Member]
Business Acquisition [Line Items]
Senior unsecured term loan and notes						$ 3,000.0
Senior Unsecured Notes [Member]
Business Acquisition [Line Items]
Senior unsecured term loan and notes						$ 7,650.0
Musculoskeletal Industry [Member] | LVB Acquisition Inc [Member]
Business Acquisition [Line Items]
Net worth		$ 50,000.0		$ 50,000.0