Fair Values Determination of Assets Acquired and Liabilities Assumed in Acquisition (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Goodwill	$ 1,354,203,000	$ 1,238,452,000
2013 Acquisition
Business Acquisition [Line Items]
Current assets	21,000,000
Property, plant and equipment	1,400,000
Goodwill	123,300,000
Total assets acquired	401,200,000
Current liabilities	5,400,000
Deferred tax liabilities	88,800,000
Liabilities assumed	94,200,000
Net assets acquired	307,000,000
2013 Acquisition | Intellectual property
Business Acquisition [Line Items]
Intangible assets	159,500,000
2013 Acquisition | Trade Names
Business Acquisition [Line Items]
Intangible assets	26,500,000
2013 Acquisition | Customer Lists
Business Acquisition [Line Items]
Intangible assets	49,600,000
2013 Acquisition | In-process Research and Development Asset
Business Acquisition [Line Items]
Intangible assets	$ 19,900,000