Changes in Carrying Amount of Goodwill (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 2,288,895us-gaap_Goodwill
Business acquisitions and adjustments to previously recorded goodwill	(453)
Exchange rate effects	(53,399)us-gaap_GoodwillTranslationAdjustments
Goodwill, ending balance	2,235,043us-gaap_Goodwill
North America
Goodwill [Roll Forward]
Goodwill, beginning balance	1,392,032
Business acquisitions and adjustments to previously recorded goodwill	540
Exchange rate effects	(9,585)
Goodwill, ending balance	1,382,987
Europe
Goodwill [Roll Forward]
Goodwill, beginning balance	616,819
Business acquisitions and adjustments to previously recorded goodwill	(383)
Exchange rate effects	(43,820)
Goodwill, ending balance	572,616
Specialty
Goodwill [Roll Forward]
Goodwill, beginning balance	280,044
Business acquisitions and adjustments to previously recorded goodwill	(610)
Exchange rate effects	6
Goodwill, ending balance	$ 279,440

The aggregate amount of goodwill acquired in the period and purchase price allocation adjustments for acquisitions made in prior periods. The value is stated at fair value based on the purchase price allocation.

No definition available.

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- Definition

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.

+ References

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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- Definition

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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

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

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