Goodwill and Other Intangible Assets - Components of Identifiable Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Identifiable Intangible Assets Acquired [Line Items]
Gross carrying amount	$ 1,282.5	$ 1,228.4
Accumulated amortization	(808.0)	(698.1)
Gross carrying amount	129.0	177.4
Total identifiable intangible assets	603.5	707.7
Technology [Member]
Identifiable Intangible Assets Acquired [Line Items]
Gross carrying amount	727.2	700.4
Accumulated amortization	(458.3)	(401.4)
Total identifiable intangible assets	268.9	299.0
Intellectual Property Rights [Member]
Identifiable Intangible Assets Acquired [Line Items]
Gross carrying amount	173.4	173.4
Accumulated amortization	(157.7)	(142.5)
Total identifiable intangible assets	15.7	30.9
Trademark and Trade Name [Member]
Identifiable Intangible Assets Acquired [Line Items]
Gross carrying amount	74.2	43.3
Accumulated amortization	(34.1)	(33.9)
Gross carrying amount	129.0	177.4
Total identifiable intangible assets	169.1	186.8
Customer Relationships [Member]
Identifiable Intangible Assets Acquired [Line Items]
Gross carrying amount	213.8	216.2
Accumulated amortization	(99.6)	(76.4)
Total identifiable intangible assets	114.2	139.8
Other [Member]
Identifiable Intangible Assets Acquired [Line Items]
Gross carrying amount	93.9	95.1
Accumulated amortization	(58.3)	(43.9)
Total identifiable intangible assets	$ 35.6	$ 51.2