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Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	Mar. 31, 2025		Dec. 31, 2024
Intangible Assets [Line Items]
Intangibles with indefinite lives - Trademarks	$ 43.8		$ 43.8
Intangibles with definite lives	396.8		396.8
Less accumulated amortization	(109.6)		(102.3)
Intangibles with definite lives, net	287.2		294.5
Intangibles, net	331.0	[1]	338.3
Customer relationships
Intangible Assets [Line Items]
Intangibles with definite lives	169.1		169.1
Permits
Intangible Assets [Line Items]
Intangibles with definite lives	178.1		178.1
Other
Intangible Assets [Line Items]
Intangibles with definite lives	$ 49.6		$ 49.6
[1] (unaudited)

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Intangible Assets

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the rights acquired through registration of a trademark to gain or protect exclusive use of a business name, symbol or other device or style for a projected indefinite period of benefit.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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