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Other Assets (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |
Capitalized software costs, net of accumulated amortization | $ 8.4 | $ 15.6
Grantor trust assets | 7.5 | 6.2
Net pension assets | 31.2 | 31.0
Long-term supplies inventory | 5.9 | 4.6
Hedge contracts assets | 10.9 | 39.2
Other assets | 17.9 | 13.5
Total | $ 81.8 | $ 110.1

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- Definition The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481283/985-20-50-1 + Details
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- Definition Carrying amount as of the balance sheet date of assets held under deferred compensation agreements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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