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Other Assets (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |
Capitalized software costs, net of accumulated amortization | $ 15.7 | $ 13.9
Grantor trust assets | 6.2 | 21.6
Net pension assets | 31.0 | 26.3
Long-term supplies inventory | 9.3 | 4.9
Hedge contracts assets | 39.2 | 3.3
Other assets | 14.0 | 6.0
Total | $ 115.4 | $ 76.0

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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