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Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets and Excess Reorganization Value [Table Text Block]

Intangible asset balances are as follows (in millions):


			March 31, 2024																		December 31, 2023
			Gross Carrying Amount						Accumulated Amortization						Net Amount						Gross Carrying Amount						Accumulated Amortization						Net Amount
Backlog			$	54.6					$	41.6					$	13.0					$	54.6					$	41.6					$	13.0
Customer relationships			68.9						43.6						25.3						68.9						42.5						26.4
Total			$	123.5					$	85.2					$	38.3					$	123.5					$	84.1					$	39.4