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CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($)
shares in Millions, $ in Millions
Dec. 31, 2023
Dec. 31, 2022
Statement of Financial Position [Abstract]    
Accounts receivable, allowance for doubtful accounts $ 7.1 $ 3.1
Property and equipment, accumulated depreciation 646.7 526.8
Allowance for estimated losses $ 106.4 $ 69.3
Preferred stock, authorized (in shares) 15.0 15.0
Preferred stock, outstanding (in shares) 0.0 0.0
Common stock, authorized (in shares) 125.0 125.0
Common stock, issued (in shares) 27.4 27.3
Common stock, outstanding (in shares) 27.4 27.3