Other Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 1,245.8		$ 1,143.6
Accumulated amortization	(371.2)		(292.3)
In-Process Research And Development
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross carrying amount	167.8	[1]	136.2	[1]
Core Technologies
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross carrying amount	717.7		660.2
Accumulated amortization	(211.2)		(161.5)
Customer Relationships
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross carrying amount	144.2		144.6
Accumulated amortization	(38.8)		(25.7)
Other Intangible Assets
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross carrying amount	216.1		202.6
Accumulated amortization	$ (121.2)		$ (105.1)

[1] Amounts capitalized as in-process research and development are accounted for as indefinite-lived intangible assets.