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Segment Information - Summary of Operations by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Customer revenue	$ 374.5	$ 432.9
Gross profit	87.4	139.2
DWS
Segment Reporting Information [Line Items]
Customer revenue	124.8	142.9
C&I
Segment Reporting Information [Line Items]
Customer revenue	129.1	120.7
ECS
Segment Reporting Information [Line Items]
Customer revenue	120.6	169.3
Intersegment
Segment Reporting Information [Line Items]
Customer revenue	0.0	(1.0)
Intersegment | DWS
Segment Reporting Information [Line Items]
Customer revenue	0.0	0.0
Intersegment | C&I
Segment Reporting Information [Line Items]
Customer revenue	0.0	0.0
Intersegment | ECS
Segment Reporting Information [Line Items]
Customer revenue	0.0	(1.0)
Operating Segments
Segment Reporting Information [Line Items]
Customer revenue	374.5	433.9
Gross profit	85.8	133.8
Operating Segments | DWS
Segment Reporting Information [Line Items]
Customer revenue	124.8	142.9
Gross profit	16.0	19.1
Operating Segments | C&I
Segment Reporting Information [Line Items]
Customer revenue	129.1	120.7
Gross profit	7.0	9.9
Operating Segments | ECS
Segment Reporting Information [Line Items]
Customer revenue	120.6	170.3
Gross profit	$ 62.8	$ 104.8

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