Segment Information - Summary of Operations by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Customer revenue	$ 390.1	$ 410.4	$ 1,207.7	$ 1,284.9
Gross profit	104.3	126.9	339.8	408.3
DWS
Segment Reporting Information [Line Items]
Customer revenue	130.1	143.2	382.1	434.5
CA&I
Segment Reporting Information [Line Items]
Customer revenue	122.3	115.9	381.5	358.3
ECS
Segment Reporting Information [Line Items]
Customer revenue	137.7	151.3	444.1	492.1
Intersegment
Segment Reporting Information [Line Items]
Customer revenue	0.0	0.0	0.0	1.4
Intersegment | DWS
Segment Reporting Information [Line Items]
Customer revenue	0.0	0.0	0.0	0.0
Intersegment | CA&I
Segment Reporting Information [Line Items]
Customer revenue	0.0	0.0	0.0	0.0
Intersegment | ECS
Segment Reporting Information [Line Items]
Customer revenue	0.0	0.0	0.0	1.4
Operating Segments
Segment Reporting Information [Line Items]
Customer revenue	390.1	410.4	1,207.7	1,286.3
Gross profit	107.3	123.2	339.7	399.3
Operating Segments | DWS
Segment Reporting Information [Line Items]
Customer revenue	130.1	143.2	382.1	434.5
Gross profit	19.7	17.7	52.2	59.7
Operating Segments | CA&I
Segment Reporting Information [Line Items]
Customer revenue	122.3	115.9	381.5	358.3
Gross profit	6.8	6.8	20.9	30.2
Operating Segments | ECS
Segment Reporting Information [Line Items]
Customer revenue	137.7	151.3	444.1	493.5
Gross profit	$ 80.8	$ 98.7	$ 266.6	$ 309.4