Segment Information - Geographic Area Data (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Geographic Area Data
Revenues	$ 470.5	$ 494.9	$ 1,453.6	$ 1,412.1
United States
Geographic Area Data
Revenues	124.1	140.1	395.9	390.6
Canada
Geographic Area Data
Revenues	13.4	12.8	42.0	35.7
Total North America
Geographic Area Data
Revenues	137.5	152.9	437.9	426.3
Europe Middle East Africa
Geographic Area Data
Revenues	195.6	187.9	604.3	552.0
Asia Pacific
Geographic Area Data
Revenues	117.5	123.5	345.4	347.8
Latin America
Geographic Area Data
Revenues	$ 19.9	$ 30.6	$ 66.0	$ 86.0