XML 47 R61.htm IDEA: XBRL DOCUMENT v2.4.1.9

Intangible Assets (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Summary of the changes in the carrying amount of goodwill by reportable segment
Goodwill, Beginning Balance	$ 1,134.9us-gaap_Goodwill	$ 961.5us-gaap_Goodwill
Goodwill, Additions	165.4us-gaap_GoodwillAcquiredDuringPeriod	165.5us-gaap_GoodwillAcquiredDuringPeriod
Goodwill, Deconsolidation of Italian investment		(7.2)pag_GoodwillWrittenOffRelatedToSaleOfBusinessUnitAndImpairmentLosses
Goodwill, Reconsolidation of Italian investment		7.4pag_GoodwillReconsolidationFromBusinessCombination
Goodwill, Foreign currency translation	(34.0)us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments	7.7us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments
Goodwill, Ending Balance	1,266.3us-gaap_Goodwill	1,134.9us-gaap_Goodwill	961.5us-gaap_Goodwill
Impairment of intangible assets	0us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill	0us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill	0us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill
Retail Automotive
Summary of the changes in the carrying amount of goodwill by reportable segment
Goodwill, Beginning Balance	1,020.5us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = pag_RetailMember	961.5us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = pag_RetailMember
Goodwill, Additions	53.7us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = pag_RetailMember	49.6us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = pag_RetailMember
Goodwill, Deconsolidation of Italian investment		(7.2)pag_GoodwillWrittenOffRelatedToSaleOfBusinessUnitAndImpairmentLosses / us-gaap_StatementBusinessSegmentsAxis = pag_RetailMember
Goodwill, Reconsolidation of Italian investment		7.4pag_GoodwillReconsolidationFromBusinessCombination / us-gaap_StatementBusinessSegmentsAxis = pag_RetailMember
Goodwill, Foreign currency translation	(24.7)us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments / us-gaap_StatementBusinessSegmentsAxis = pag_RetailMember	9.2us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments / us-gaap_StatementBusinessSegmentsAxis = pag_RetailMember
Goodwill, Ending Balance	1,049.5us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = pag_RetailMember	1,020.5us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = pag_RetailMember
Other
Summary of the changes in the carrying amount of goodwill by reportable segment
Goodwill, Beginning Balance	114.4us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Goodwill, Additions	111.7us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember	115.9us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Goodwill, Foreign currency translation	(9.3)us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember	(1.5)us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Goodwill, Ending Balance	$ 216.8us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember	$ 114.4us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember

X

- Definition

Represents the amount of goodwill on account of business combination of all or a portion of a reporting unit during the period.

+ References

No definition available.

+ Details

Name:	pag_GoodwillReconsolidationFromBusinessCombination
Namespace Prefix:	pag_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Represents the amount of goodwill written off on account of impairment losses and on sale of all or a portion of a reporting unit during the period.

+ References

No definition available.

+ Details

Name:	pag_GoodwillWrittenOffRelatedToSaleOfBusinessUnitAndImpairmentLosses
Namespace Prefix:	pag_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

+ Details

Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillAcquiredDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_GoodwillRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 3

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16373-109275

+ Details

Name:	us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=pag_RetailMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=us-gaap_AllOtherSegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: