Goodwill and Other Intangible Assets - Changes in Carrying Value of Goodwill by Reportable Segment (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Apr. 03, 2019	Dec. 31, 2018
Goodwill [Roll Forward]
Goodwill	$ 1,262.4	$ 1,262.4		$ 1,297.1
Impairment charges	64.0	64.0
Jefferson Wells
Goodwill [Roll Forward]
Goodwill	55.5	55.5
Americas | United States
Goodwill [Roll Forward]
Goodwill	476.5	476.5		476.5
Americas | United States | Jefferson Wells
Goodwill [Roll Forward]
Goodwill	532.0	532.0		532.0
Southern Europe
Goodwill [Roll Forward]
Goodwill			$ 31.2
Southern Europe | France
Goodwill [Roll Forward]
Goodwill	68.3	68.3		68.9
Southern Europe | Italy
Goodwill [Roll Forward]
Goodwill	4.7	4.7		4.8
Northern Europe | Germany
Goodwill [Roll Forward]
Goodwill	67.5	$ 67.5		$ 129.2
Impairment charges	60.2
APME | New Zealand
Goodwill [Roll Forward]
Impairment charges	$ 3.8