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Basis of Presentation and Accounting Policies - Schedule of Estimated Fair Values and Carrying Values of Goodwill (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Goodwill [Line Items]
Carrying values	$ 1,206.6	$ 1,225.8
Reportable Geographical Components | France
Goodwill [Line Items]
Estimated fair values	3,130.8
Carrying values	1,358.2
Reportable Geographical Components | United States
Goodwill [Line Items]
Estimated fair values	1,480.2
Carrying values	912.4
Reportable Geographical Components | United Kingdom
Goodwill [Line Items]
Estimated fair values	412.0
Carrying values	335.4
Reportable Geographical Components | Switzerland
Goodwill [Line Items]
Estimated fair values	203.5
Carrying values	103.9
Reportable Geographical Components | Canada
Goodwill [Line Items]
Estimated fair values	150.1
Carrying values	85.4
Reportable Geographical Components | Sweden
Goodwill [Line Items]
Estimated fair values	130.5
Carrying values	$ 123.7

X

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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

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-Publisher FASB
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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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