Segment Information - Summary of Operations by Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Customer revenue	$ 443.1	$ 441.6	$ 817.6	$ 874.5
Gross profit	148.1	142.2	235.5	281.4
DWS
Segment Reporting Information [Line Items]
Customer revenue	127.2	148.4	252.0	291.3
CA&I
Segment Reporting Information [Line Items]
Customer revenue	130.1	121.7	259.2	242.4
ECS
Segment Reporting Information [Line Items]
Customer revenue	185.8	171.5	306.4	340.8
Intersegment
Segment Reporting Information [Line Items]
Customer revenue	0.0	(0.4)	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	(0.4)	0.0	(1.4)
Operating Segments
Segment Reporting Information [Line Items]
Customer revenue	443.1	442.0	817.6	875.9
Gross profit	146.6	142.3	232.4	276.1
Operating Segments | DWS
Segment Reporting Information [Line Items]
Customer revenue	127.2	148.4	252.0	291.3
Gross profit	16.5	22.9	32.5	42.0
Operating Segments | CA&I
Segment Reporting Information [Line Items]
Customer revenue	130.1	121.7	259.2	242.4
Gross profit	7.1	13.5	14.1	23.4
Operating Segments | ECS
Segment Reporting Information [Line Items]
Customer revenue	185.8	171.9	306.4	342.2
Gross profit	$ 123.0	$ 105.9	$ 185.8	$ 210.7