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Financial Instruments and Fair Value Measurements (Narrative) (Details) | 3 Months Ended | 4 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2024 USD ($) | Apr. 30, 2024 USD ($) | Dec. 31, 2024 USD ($) store | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Franchise rights impairment |  |  | $ 12,500,000 | $ 0 | $ 0
Fair Value Measurement Inputs and Valuation Techniques [Abstract] |  |  |  |  |
Impairment, Intangible Asset, Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  | Franchise rights impairment | Franchise rights impairment |
AN Reportable Segment, Domestic [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Franchise rights impairment, number of stores | store |  |  | 1 |  |
AN Reportable Segment, Import [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Franchise rights impairment, number of stores | store |  |  | 1 |  |
Franchise Rights |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Franchise rights impairment |  | $ 0 |  | $ 0 |
Franchise Rights | Nonrecurring [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Franchise rights impairment | $ 12,500,000 |  | $ 12,500,000 |  |
Franchise Rights | Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Long-Term Revenue Growth Rate | Valuation Technique, Discounted Cash Flow |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Abstract] |  |  |  |  |
Franchise Rights, Measurement Input | 0.020 |  | 0.020 |  |
Franchise Rights | Nonrecurring [Member] | Arithmetic Average | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Weighted Average Cost of Capital | Valuation Technique, Discounted Cash Flow |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Abstract] |  |  |  |  |
Franchise Rights, Measurement Input | 0.100 |  | 0.100 |  |
Franchise Rights | Nonrecurring [Member] | Arithmetic Average | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Discount Rate | Valuation Technique, Discounted Cash Flow |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Abstract] |  |  |  |  |
Franchise Rights, Measurement Input | 0.143 |  | 0.143 |  |
Franchise Rights | Nonrecurring [Member] | Arithmetic Average | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Long-term Pretax Loss Margin | Valuation Technique, Discounted Cash Flow |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Abstract] |  |  |  |  |
Franchise Rights, Measurement Input | 0.046 |  | 0.046 |  |
Franchise Rights | Nonrecurring [Member] | Arithmetic Average | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Contributory Asset Charges | Valuation Technique, Discounted Cash Flow |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Abstract] |  |  |  |  |
Franchise Rights, Measurement Input | 0.060 |  | 0.060 |  |
Franchise Rights | Nonrecurring [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Discount Rate | Valuation Technique, Discounted Cash Flow |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Abstract] |  |  |  |  |
Franchise Rights, Measurement Input | 0.135 |  | 0.135 |  |
Franchise Rights | Nonrecurring [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Long-term Pretax Loss Margin | Valuation Technique, Discounted Cash Flow |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Abstract] |  |  |  |  |
Franchise Rights, Measurement Input | 0.027 |  | 0.027 |  |
Franchise Rights | Nonrecurring [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Contributory Asset Charges | Valuation Technique, Discounted Cash Flow |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Abstract] |  |  |  |  |
Franchise Rights, Measurement Input | 0.055 |  | 0.055 |  |
Franchise Rights | Nonrecurring [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Discount Rate | Valuation Technique, Discounted Cash Flow |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Abstract] |  |  |  |  |
Franchise Rights, Measurement Input | 0.150 |  | 0.150 |  |
Franchise Rights | Nonrecurring [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Long-term Pretax Loss Margin | Valuation Technique, Discounted Cash Flow |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Abstract] |  |  |  |  |
Franchise Rights, Measurement Input | 0.064 |  | 0.064 |  |
Franchise Rights | Nonrecurring [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Contributory Asset Charges | Valuation Technique, Discounted Cash Flow |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Abstract] |  |  |  |  |
Franchise Rights, Measurement Input | 0.064 |  | 0.064 |  |
Continuing Operations [Member] | Nonrecurring [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Impairment of assets held and used |  |  | $ 9,300,000 | 2,900,000 |
Reported Value Measurement [Member] | Continuing Operations [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets held for sale | $ 23,600,000 |  | $ 23,600,000 | $ 21,300,000 |

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