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v3.23.1

Vehicle Financing (Details) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022
Short-Term Debt [Abstract] |  |
Maturity period of floor plan arrangements outside the U.S. if not payable on demand | 90 days |
Weighted average interest rate on floor plan borrowings (as a percent) | 4.00% | 1.20%

X
- Definition The maximum period of original maturity for floor plans outside of the United States. + References No definition available. + Details
Name: | pag_FloorPlanNotesPayableForeignMaximumDuration
Namespace Prefix: | pag_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average interest rate of debt outstanding. + References No definition available. + Details
Name: | us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_ShortTermBorrowingsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration