Other Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Finite Lived and Indefinite Lived Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	$ 1,537.9		$ 1,625.2
Accumulated amortization	(484.0)		(460.3)
Core and developed technologies
Finite Lived and Indefinite Lived Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	1,082.5		968.3
Accumulated amortization	(333.4)		(271.5)
Customer Relationships
Finite Lived and Indefinite Lived Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	138.9		144.6
Accumulated amortization	(58.7)		(51.4)
Other Intangible Assets
Finite Lived and Indefinite Lived Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	183.6		241.8
Accumulated amortization	(91.9)		(137.4)
In-Process Research And Development
Finite Lived and Indefinite Lived Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	$ 132.9	[1]	$ 270.5	[1]

[1] See Note 3 of the notes to consolidated financial statements for further discussion of IPR&D impairment charges.