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Business, Basis of Presentation and Significant Accounting Policies - Goodwill and Indefinite-Lived Intangible Assets (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($) reportingUnit	Dec. 31, 2023 USD ($) reportingUnit
Goodwill [Line Items]
Impairment loss		$ 115.3		$ 119.3
Goodwill, impairment loss		0.0	$ 0.0	0.0
Goodwill
Goodwill [Line Items]
Discount rate sensitivity analysis, spread on discount rate for which evaluation was completed (percentage)	1.00%
Power Delivery
Goodwill [Line Items]
Impairment loss		0.0		$ 0.0
Goodwill impairment testing, number of reporting units | reportingUnit				1
Communications
Goodwill [Line Items]
Impairment loss		0.0		$ 0.0
Goodwill impairment testing, number of reporting units | reportingUnit			2
Clean Energy and Infrastructure
Goodwill [Line Items]
Impairment loss		0.0		$ 0.0
Goodwill impairment testing, number of reporting units | reportingUnit			1	3
Pipeline Infrastructure
Goodwill [Line Items]
Impairment loss		$ 115.3		$ 119.3
Goodwill impairment testing, number of reporting units | reportingUnit			1	1
Power Delivery Segment, Reporting Unit One | Power Delivery
Goodwill [Line Items]
Impairment loss	$ 0.0

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