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Supplemental Financial Information (Accrued Liabilities) (Details) - USD ($)
$ in Millions
Mar. 31, 2023
Dec. 31, 2022
Supplemental Financial Information [Abstract]    
Deferred revenue $ 65.8 $ 78.0
Personnel costs 60.6 55.8
Income and other taxes payable 53.5 41.4
Accrued claims 25.6 27.2
Accrued interest 18.9 7.6
Lease liabilities 8.8 9.4
Other 34.5 28.5
 Accrued liabilities and other $ 267.7 $ 247.9