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Segment Information - Summary of Operations by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Cost of revenue	$ 343.0	$ 352.0	$ 1,020.9	$ 1,052.1
Gross profit	117.2	145.0	354.7	410.9
Operating Segments
Segment Reporting Information [Line Items]
Revenue	438.9	474.3	1,316.3	1,391.0
Cost of revenue	321.6	326.4	954.1	980.3
Gross profit	117.3	147.9	362.2	410.7
Operating Segments | DWS
Segment Reporting Information [Line Items]
Revenue	125.3	130.9	382.0	395.3
Cost of revenue	105.0	109.6	321.4	333.6
Gross profit	20.3	21.3	60.6	61.7
Operating Segments | CA&I
Segment Reporting Information [Line Items]
Revenue	180.4	189.4	542.2	571.7
Cost of revenue	145.0	152.5	433.8	458.1
Gross profit	35.4	36.9	108.4	113.6
Operating Segments | ECS
Segment Reporting Information [Line Items]
Revenue	133.2	154.0	392.1	424.0
Cost of revenue	71.6	64.3	198.9	188.6
Gross profit	$ 61.6	$ 89.7	$ 193.2	$ 235.4

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