Biomet Merger - Summary of Preliminary Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Cash	$ 494.8
Accounts receivable, net	555.0
Inventory	1,167.9
Other current assets	167.0
Property, plant and equipment	698.4
Other assets	20.1
Goodwill	7,679.5	$ 7,708.4	$ 2,417.0	$ 2,514.2
Total assets acquired	17,792.2
Current liabilities	599.6
Long-term debt	2,740.0
Deferred taxes	2,527.5
Other long-term liabilities	58.9
Total liabilities assumed	5,926.0
Net assets acquired	11,866.2
Technology [Member]
Business Acquisition [Line Items]
Intangible assets subject to amortization	3,091.1
Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets subject to amortization	5,829.0
Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Intangible assets not subject to amortization	515.0
As Reported [Member]
Business Acquisition [Line Items]
Cash	494.8
Accounts receivable, net	544.7
Inventory	1,161.7
Other current assets	202.3
Property, plant and equipment	699.4
Other assets	29.5
Goodwill	5,270.2	7,730.7	$ 2,417.0	$ 2,514.2
Total assets acquired	17,821.9
Current liabilities	588.9
Long-term debt	2,740.0
Deferred taxes	2,568.6
Other long-term liabilities	58.2
Total liabilities assumed	5,955.7
Net assets acquired	11,866.2
As Reported [Member] | Technology [Member]
Business Acquisition [Line Items]
Intangible assets subject to amortization	3,075.3
As Reported [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets subject to amortization	5,829.0
As Reported [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Intangible assets not subject to amortization	515.0
Adjustment [Member]
Business Acquisition [Line Items]
Accounts receivable, net	10.3
Inventory	6.2
Other current assets	(35.3)
Property, plant and equipment	(1.0)
Other assets	(9.4)
Goodwill	(16.3)	$ (22.3)
Total assets acquired	(29.7)
Current liabilities	10.7
Deferred taxes	(41.1)
Other long-term liabilities	0.7
Total liabilities assumed	(29.7)
Adjustment [Member] | Technology [Member]
Business Acquisition [Line Items]
Intangible assets subject to amortization	$ 15.8