Segment Information - Geographic Area Data (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Geographic Area Data
Revenues	$ 418.7	$ 513.6	$ 840.2	$ 983.1
United States
Geographic Area Data
Revenues	114.5	140.2	221.2	271.8
Canada
Geographic Area Data
Revenues	13.0	15.7	24.4	28.6
Total North America
Geographic Area Data
Revenues	127.5	155.9	245.6	300.4
Europe Middle East Africa
Geographic Area Data
Revenues	159.8	214.1	343.5	408.7
Asia Pacific
Geographic Area Data
Revenues	112.7	118.7	213.0	227.9
Latin America
Geographic Area Data
Revenues	$ 18.7	$ 24.9	$ 38.1	$ 46.1