Goodwill and Other Intangible Assets - Schedule of Goodwill Balances by Reporting Unit (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill	$ 1,215.0	$ 1,225.8
Jefferson Wells
Goodwill [Line Items]
Goodwill	55.5
Americas | United States
Goodwill [Line Items]
Goodwill	493.1	490.2
Americas | United States | Jefferson Wells
Goodwill [Line Items]
Goodwill	548.6	545.7
Northern Europe | Netherlands
Goodwill [Line Items]
Goodwill	114.6	119.3
Northern Europe | United Kingdom
Goodwill [Line Items]
Goodwill	101.0	100.2
Southern Europe | France
Goodwill [Line Items]
Goodwill	70.4	73.3
Other Reporting Units
Goodwill [Line Items]
Goodwill	$ 380.4	$ 387.3