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	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued (in shares)	803	77	321,752	318,572
Shares surrendered to AutoNation to satisfy tax withholding obligations (in shares)	228	26	115,049	108,634

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details