Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Accounts Receivable, allowance for credit losses	$ 2.1	$ 1.7
Auto loans receivable, allowance for credit losses	$ 46.3	$ 57.5
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock authorized (in shares)	1,500,000,000	1,500,000,000
Common stock issued (in shares)	63,562,149	63,562,149
Treasury Stock, Common, Shares	21,917,635	15,915,358