Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets [Table Text Block]

Intangible asset balances are as follows (in millions):


			December 31, 2025																		December 31, 2024
			Gross Carrying Amount						Accumulated Amortization						Net Amount						Gross Carrying Amount						Accumulated Amortization						Net Amount
Backlog			$	54.6					$	50.6					$	4.0					$	54.6					$	46.8					$	7.8
Customer relationships			68.9						51.7						17.2						68.9						47.1						21.8
Total			$	123.5					$	102.3					$	21.2					$	123.5					$	93.9					$	29.6

Finite-lived Intangible Assets Amortization Expense [Table Text Block]

The amount of amortization expense for intangible assets in each of the succeeding years is estimated to be as follows (in millions):


2026			$	6.1
2027			5.8
2028			5.9
2029			3.4
2030			—
Thereafter			—
Total			$	21.2