XML 59 R47.htm IDEA: XBRL DOCUMENT
v3.25.1

Inventories - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Inventory Disclosure [Abstract] |  |
Interest credits and advertising assistance | $ 16.7 | $ 14.4

X
- Definition Floor plan interest credits and advertising assistance received from vendors, which reduce the cost of sales. + References No definition available. + Details
Name: | pag_FloorPlanInterestCreditsAndAdvertisingAssistance
Namespace Prefix: | pag_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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