Business Combinations - Summary of Preliminary Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Jun. 24, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Cash	$ 494.8
Accounts receivable, net	529.0
Inventory	1,245.7
Other current assets	26.4
Property, plant and equipment	791.4
Other assets	241.1
Goodwill	9,934.2		$ 2,514.2	$ 2,611.2
Total assets acquired	19,464.4
Current liabilities	628.1
Long-term debt	2,740.0
Deferred taxes	4,097.5
Other long-term liabilities	58.9
Total liabilities assumed	7,524.5
Net assets acquired	11,939.9
In Process Research and Development (IPR&D) [Member]
Business Acquisition [Line Items]
Intangible assets not subject to amortization	246.0
Technology [Member]
Business Acquisition [Line Items]
Intangible assets subject to amortization	2,492.1
Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets subject to amortization	4,956.0
Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Intangible assets not subject to amortization	479.0
Intangible assets subject to amortization	389.0
As Reported [Member]
Business Acquisition [Line Items]
Cash		$ 494.8
Accounts receivable, net		544.7
Inventory		1,161.7
Other current assets		123.4
Property, plant and equipment		699.4
Other assets		29.5
Goodwill		5,270.2
Total assets acquired		17,743.0
Current liabilities		588.9
Long-term debt		2,740.0
Deferred taxes		2,489.7
Other long-term liabilities		58.2
Total liabilities assumed		5,876.8
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
Adjustments [Member]
Business Acquisition [Line Items]
Accounts receivable, net	(15.7)
Inventory	84.0
Other current assets	(97.0)
Property, plant and equipment	92.0
Other assets	211.6
Goodwill	2,303.7
Total assets acquired	1,721.4
Current liabilities	39.2
Deferred taxes	1,607.8
Other long-term liabilities	0.7
Total liabilities assumed	1,647.7
Net assets acquired	73.7
Adjustments [Member] | In Process Research and Development (IPR&D) [Member]
Business Acquisition [Line Items]
Intangible assets not subject to amortization	246.0
Adjustments [Member] | Technology [Member]
Business Acquisition [Line Items]
Intangible assets subject to amortization	(583.2)
Adjustments [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets subject to amortization	(873.0)
Adjustments [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Intangible assets not subject to amortization	(36.0)
Intangible assets subject to amortization	$ 389.0