Goodwill (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Dec. 31, 2020	Sep. 30, 2021
Goodwill [Roll Forward]
Accumulated Impairment	$ (2,496.0)	$ (2,496.0)
Currency translation		(39.6)
Goodwill	5,342.8	5,310.1
Goodwill, Acquired During Period	131.8	6.9
Americas [Member]
Goodwill [Roll Forward]
Currency translation		(0.7)
Goodwill	3,980.0	3,982.0
Goodwill, Acquired During Period		2.7
EMEA [Member]
Goodwill [Roll Forward]
Currency translation		(41.4)
Goodwill	793.5	756.3
Goodwill, Acquired During Period		4.2
Asia Pacific [Member]
Goodwill [Roll Forward]
Currency translation		2.5
Goodwill	$ 569.3	571.8
Goodwill, Acquired During Period		$ 0.0

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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Amount of accumulated impairment loss for 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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
-Paragraph 1
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