XML 95 R75.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Income Taxes - PTG (Details) - PTG $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 USD ($)
Income Taxes |
Ownership interest (as a percent) | 100.00%
Decrease in deferred tax liabilities due to an adjustment to the tax basis of the investment | $ 5.1

X
- Definition Decrease in deferred tax liabilities due to an adjustment to the tax basis of the investment. + References No definition available. + Details
Name: | pag_DecreaseInDeferredTaxLiabilitiesDueToTaxBasisAdjustmentOfInvestment
Namespace Prefix: | pag_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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_IncomeTaxLineItems
Namespace Prefix: | pag_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage of investment ownership. + References No definition available. + Details
Name: | pag_InvestmentOwnershipPercentage
Namespace Prefix: | pag_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=pag_PremierTruckGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |