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CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Millions | 9 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022
Statement of Cash Flows [Abstract] |  |
Repayment of sellers' floor plan notes payable | $ 24.3 | $ 51.3

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- Definition Repayment of sellers' floor plan notes payable + References No definition available. + Details
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Namespace Prefix: | pag_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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