Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 2,984.2us-gaap_GoodwillGross	$ 2,944.8us-gaap_GoodwillGross
Accumulated impairment losses, Beginning Balance	(373.0)	(373.0)
Goodwill, net of accumulated impairment losses, Beginning Balance	2,611.2us-gaap_Goodwill	2,571.8us-gaap_Goodwill
Acquisitions	40.6us-gaap_GoodwillAcquiredDuringPeriod	35.0us-gaap_GoodwillAcquiredDuringPeriod
Currency translation	(137.6)us-gaap_GoodwillTranslationAdjustments	4.4us-gaap_GoodwillTranslationAdjustments
Goodwill, Ending Balance	2,887.2us-gaap_GoodwillGross	2,984.2us-gaap_GoodwillGross
Accumulated impairment losses, Ending Balance	(373.0)	(373.0)
Goodwill, net of accumulated impairment losses, Ending Balance	2,514.2us-gaap_Goodwill	2,611.2us-gaap_Goodwill
Americas [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	1,629.9	1,623.9
Accumulated impairment losses, Beginning Balance	(373.0)	(373.0)
Goodwill, net of accumulated impairment losses, Beginning Balance	1,256.9	1,250.9
Acquisitions	40.6	11.0
Currency translation	(4.3)	(5.0)
Goodwill, Ending Balance	1,666.2	1,629.9
Accumulated impairment losses, Ending Balance	(373.0)	(373.0)
Goodwill, net of accumulated impairment losses, Ending Balance	1,293.2	1,256.9
Europe [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	1,187.1	1,128.6
Goodwill, net of accumulated impairment losses, Beginning Balance	1,187.1	1,128.6
Acquisitions		24.0
Currency translation	(119.4)	34.5
Goodwill, Ending Balance	1,067.7	1,187.1
Goodwill, net of accumulated impairment losses, Ending Balance	1,067.7	1,187.1
Asia Pacific [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	167.2	192.3
Goodwill, net of accumulated impairment losses, Beginning Balance	167.2	192.3
Currency translation	(13.9)	(25.1)
Goodwill, Ending Balance	153.3	167.2
Goodwill, net of accumulated impairment losses, Ending Balance	$ 153.3	$ 167.2

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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