Biomet Merger - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		1 Months Ended	3 Months Ended		6 Months Ended	9 Months Ended
	Jun. 24, 2015	Mar. 31, 2015	Sep. 30, 2015	Sep. 30, 2014	Jun. 30, 2015	Sep. 30, 2015	Sep. 30, 2014
Business Acquisition [Line Items]
Business acquisition liability incurred			$ 2,740.0			$ 2,740.0
Gain on divestiture of assets			12.3		$ (3.4)	8.9
Biomet merger consideration compensation expense						164.1
Net assets acquired			11,866.2			11,866.2
Operating profit			116.0	$ 255.2		253.8	$ 811.0
Net Sales			1,762.2	1,106.0		4,064.2	3,450.4
Merger retention plans, expenses recognized						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
Musculoskeletal Industry [Member] | LVB Acquisition Inc [Member]
Business Acquisition [Line Items]
Net worth			50,000.0			50,000.0
Biomet [Member]
Business Acquisition [Line Items]
Operating profit			28.3			316.5
Net Sales			742.8			802.7
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
Merger retention plans, expenses recognized							73.0
Merger transaction costs				$ 17.7			$ 17.7
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]
Proceeds from senior unsecured notes		$ 3,000.0
Senior Unsecured Notes [Member]
Business Acquisition [Line Items]
Proceeds from senior unsecured notes		$ 7,650.0