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Goodwill and Other Intangible Assets - Gross carrying amount, accumulated amortization and net book value of intangible assets other than goodwill (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Intangible asset balances by major asset class    
Intangible assets, gross (excluding goodwill) $ 175.9 $ 163.6
Finite-lived intangible assets, amortization amount (48.8) (45.1)
Intangible assets, book value 127.1 118.5
Indefinite-lived Intangible Assets    
Intangible asset balances by major asset class    
Intangible assets, gross (excluding goodwill) 110.9 102.8
Finite-lived intangible assets, amortization amount 0.0 0.0
Intangible assets, book value 110.9 102.8
Indefinite-lived Intangible Assets | Distribution Network    
Intangible asset balances by major asset class    
Indefinite-lived intangible assets, book value 15.0 13.6
Finite-lived intangible assets, amortization amount 0.0 0.0
Indefinite-lived Intangible Assets | Trademarks and Tradenames    
Intangible asset balances by major asset class    
Indefinite-lived intangible assets, book value 95.9 89.2
Finite-lived intangible assets, amortization amount 0.0 0.0
Finite-Lived Intangible Assets    
Intangible asset balances by major asset class    
Finite-lived intangible assets, carrying amount 65.0 60.8
Finite-lived intangible assets, amortization amount (48.8) (45.1)
Finite-lived intangible assets, book value 16.2 15.7
Finite-Lived Intangible Assets | Customer Relationships    
Intangible asset balances by major asset class    
Finite-lived intangible assets, carrying amount 28.3 26.3
Finite-lived intangible assets, amortization amount (13.9) (13.0)
Finite-lived intangible assets, book value 14.4 13.3
Finite-Lived Intangible Assets | Patents    
Intangible asset balances by major asset class    
Finite-lived intangible assets, carrying amount 30.3 28.1
Finite-lived intangible assets, amortization amount (30.0) (27.8)
Finite-lived intangible assets, book value 0.3 0.3
Finite-Lived Intangible Assets | Noncompetition Agreements    
Intangible asset balances by major asset class    
Finite-lived intangible assets, carrying amount 4.2 4.2
Finite-lived intangible assets, amortization amount (3.2) (2.8)
Finite-lived intangible assets, book value 1.0 1.4
Finite-Lived Intangible Assets | Trademarks and Tradenames    
Intangible asset balances by major asset class    
Finite-lived intangible assets, carrying amount 2.2 2.2
Finite-lived intangible assets, amortization amount (1.7) (1.5)
Finite-lived intangible assets, book value $ 0.5 $ 0.7