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CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
CONSOLIDATED STATEMENTS OF CASH FLOWS |  |  |
Repayment of Sellers' Floor Plan Notes Payable Dealership Acquisitions | $ 117.8 pag_RepaymentOfSellersFloorPlanNotesPayableDealershipAcquisitions | $ 29.6 pag_RepaymentOfSellersFloorPlanNotesPayableDealershipAcquisitions | $ 74.9 pag_RepaymentOfSellersFloorPlanNotesPayableDealershipAcquisitions
Statement |  |  |
Interest rate (as a percent) |  |  | 3.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
5.375% senior subordinated notes due 2024 |  |  |
Statement |  |  |
Interest rate (as a percent) | 5.375%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = pag_SeniorSubordinatedNotes5.375PercentDue2024Member |  |
5.75% senior subordinated notes due 2022 |  |  |
Statement |  |  |
Interest rate (as a percent) | 5.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = pag_SeniorSubordinatedNotes5.75PercentDue2022Member | 5.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = pag_SeniorSubordinatedNotes5.75PercentDue2022Member | 5.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = pag_SeniorSubordinatedNotes5.75PercentDue2022Member
7.75% Notes |  |  |
Statement |  |  |
Interest rate (as a percent) |  |  | 7.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = pag_SeniorSubordinatedNotes7.75PercentDue2016Member
3.5% Notes |  |  |
Statement |  |  |
Interest rate (as a percent) |  |  | 3.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = pag_SeniorSubordinatedConvertibleNotesMember

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- Definition Repayment of sellers' floor plan notes payable, dealership acquisitions. + References No definition available. + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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