Goodwill and Other Intangible Assets - Schedule of Goodwill Balances by Reporting Unit (Details) - USD ($) $ in Millions		Jun. 30, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill	[1]	$ 1,669.9	$ 1,722.2
Jefferson Wells
Goodwill [Line Items]
Goodwill		55.5
France
Goodwill [Line Items]
Goodwill		62.9	68.2
Sweden
Goodwill [Line Items]
Goodwill		36.9	41.4
Americas | United States
Goodwill [Line Items]
Goodwill		1,008.3	1,013.0
Americas | United States | Jefferson Wells
Goodwill [Line Items]
Goodwill		1,087.0	1,091.7
Northern Europe | Netherlands
Goodwill [Line Items]
Goodwill		103.5	112.2
Northern Europe | United Kingdom
Goodwill [Line Items]
Goodwill		100.8	110.7
Southern Europe | France
Goodwill [Line Items]
Goodwill		69.0	74.3
Other Reporting Units
Goodwill [Line Items]
Goodwill		$ 272.7	$ 291.9

[1] Balances were net of accumulated impairment loss of $644.2 as of both June 30, 2022 and December 31, 2021.