Shareholders' Equity (Shares Issued And Shares Surrendered To Satisfy Tax Withholdings In Connection With Restricted Stock Units) (Details) - Restricted Stock Units (RSUs) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued (in shares)	3,383	3,649	321,955	343,489
Shares surrendered to AutoNation to satisfy tax withholding obligations (in shares)	1,314	1,401	109,948	116,547