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Revenue - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2025	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Remaining performance obligations yet to be satisfied	$ 958.3
Performance obligations to be recognized as revenue within next twelve months	621.3
Contract with customer, revenue recognized	126.6
Retentions to be collected within one year	29.4	$ 29.0
Contract retentions collectible beyond one year	71.3	61.5
Unapproved change orders and claims	$ 12.9	$ 11.4

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