XML 64 R52.htm IDEA: XBRL DOCUMENT
v3.21.2

Intangible Assets - Activity (Details) | 6 Months Ended
--- | ---
Jun. 30, 2021 item
Retail Automotive | Disposal group, not discontinued operations |
Intangible assets |
Number of franchises disposed | 1

X
- Definition 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. + References No definition available. + Details
Name: | pag_IndefiniteLivedIntangibleAssetsIncludingGoodwillByMajorClassLineItems
Namespace Prefix: | pag_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of franchises disposed of by the entity during the period. + References No definition available. + Details
Name: | pag_NumberOfFranchisesDisposed
Namespace Prefix: | pag_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FranchisorDisclosureAxis=pag_RetailAutomotiveDealershipOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupNotDiscontinuedOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |