Acquired Intangible Assets and Related Amortization (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Finite Lived Intangible Assets [Line Items]
Acquired intangible assets, net	$ 310.5	$ 221.6
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	272.0	237.4
Accumulated amortization	(93.5)	(86.6)
Acquired intangible assets, net	178.5	150.8
Trade Secrets [Member]
Finite Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	31.0	31.1
Accumulated amortization	(19.7)	(18.5)
Acquired intangible assets, net	11.3	12.6
Computer Software Intangible Asset [Member]
Finite Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	72.5	71.0
Accumulated amortization	(42.7)	(38.8)
Acquired intangible assets, net	29.8	32.2
Trade Names [Member]
Finite Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	81.3	31.3
Accumulated amortization	(12.5)	(11.7)
Acquired intangible assets, net	68.8	19.6
Other Intangible Assets [Member]
Finite Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	42.9	26.1
Accumulated amortization	(20.8)	(19.7)
Acquired intangible assets, net	$ 22.1	$ 6.4