CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Millions, $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 3.1	$ 7.1
Property and equipment, accumulated depreciation	773.8	646.7
Finance receivables, allowance for estimated losses	$ 120.5	$ 106.4
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)	26.6	27.4
Common stock, outstanding (in shares)	26.6	27.4