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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 |

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