XML 41 R36.htm IDEA: XBRL DOCUMENT v3.3.0.814

Inventories (Details 2) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Inventories
Interest credits and advertising assistance	$ 12.5	$ 12.7	$ 32.7	$ 29.9

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