Goodwill and Other Intangible Assets, net - Changes in Goodwill by Segment (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015
Changes in goodwill:
Balance at December 31, 2014	$ 1,853.6us-gaap_Goodwill
Acquisitions	15.1us-gaap_GoodwillAcquiredDuringPeriod
Currency translation	(96.5)us-gaap_GoodwillTranslationAdjustments
Other	(0.2)us-gaap_GoodwillOtherChanges
Balance at March 31, 2015	1,772.0us-gaap_Goodwill
Americas
Changes in goodwill:
Balance at December 31, 2014	1,042.3
Acquisitions	15.1
Currency translation	(8.8)
Other	0
Balance at March 31, 2015	1,048.6
EMEA-APAC
Changes in goodwill:
Balance at December 31, 2014	811.3
Acquisitions	0
Currency translation	(87.7)
Other	(0.2)
Balance at March 31, 2015	$ 723.4

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

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-Name Accounting Standards Codification

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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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