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Goodwill and Other Intangible Assets - Schedule of Goodwill Balances by Reporting Unit (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Goodwill [Line Items]
Goodwill	$ 1,635.2	$ 1,628.1
Jefferson Wells
Goodwill [Line Items]
Goodwill	(55.5)	(55.5)
Netherlands | Jefferson Wells
Goodwill [Line Items]
Goodwill	56.2	55.1
France
Goodwill [Line Items]
Goodwill	74.8	73.3
Canada
Goodwill [Line Items]
Goodwill	42.5	41.6
Americas | United States
Goodwill [Line Items]
Goodwill	1,006.5	1,006.5
Americas | United States | Jefferson Wells
Goodwill [Line Items]
Goodwill	1,085.3	1,085.3
Northern Europe | Netherlands
Goodwill [Line Items]
Goodwill	56.2
Northern Europe | United Kingdom
Goodwill [Line Items]
Goodwill	104.7	100.2
Southern Europe | France
Goodwill [Line Items]
Goodwill	80.9	79.5
Other Reporting Units
Goodwill [Line Items]
Goodwill	$ 265.6	$ 266.4

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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.

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