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Other Assets (Tables)
 12 Months Ended
Dec. 31, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Schedule of Other Assets
Other assets consisted of the following (in millions):
December 31,
20222021
Capitalized software costs, net of accumulated amortization$15.7 $13.9 
Grantor trust assets6.2 21.6 
Net pension assets31.0 26.3 
Long-term supplies inventory9.3 4.9 
Hedge contracts assets39.2 3.3 
Other assets14.0 6.0 
Total$115.4 $76.0