Acquired Intangible Assets and Related Amortization (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Finite Lived Intangible Assets [Line Items]
Acquired intangible assets, net	$ 212.8	$ 221.6
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	235.7	237.4
Accumulated amortization	(90.1)	(86.6)
Acquired intangible assets, net	145.6	150.8
Trade Secrets [Member]
Finite Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	30.8	31.1
Accumulated amortization	(19.1)	(18.5)
Acquired intangible assets, net	11.7	12.6
Software [Member]
Finite Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	71.2	71.0
Accumulated amortization	(40.6)	(38.8)
Acquired intangible assets, net	30.6	32.2
Trade Names [Member]
Finite Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	30.8	31.3
Accumulated amortization	(12.0)	(11.7)
Acquired intangible assets, net	18.8	19.6
Other Intangible Assets [Member]
Finite Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	26.2	26.1
Accumulated amortization	(20.1)	(19.7)
Acquired intangible assets, net	$ 6.1	$ 6.4