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Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2023		Dec. 31, 2022
Intangible Assets [Line Items]
Intangibles with indefinite lives - Trademarks	$ 34.9		$ 34.1
Intangibles with definite lives	283.2		281.3
Less accumulated amortization	(71.1)		(59.3)
Intangibles with definite lives, net	212.1		222.0
Intangibles, net	247.0	[1]	256.1
Customer relationships
Intangible Assets [Line Items]
Intangibles with definite lives	138.7		136.9
Permits
Intangible Assets [Line Items]
Intangibles with definite lives	141.8		141.7
Other
Intangible Assets [Line Items]
Intangibles with definite lives	$ 2.7		$ 2.7
[1] (unaudited)

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- Definition

Intangible Assets

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 928
-SubTopic 340
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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 926
-SubTopic 20
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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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