Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Non-cash transactions
Increase in acquired assets	$ 18.5
Increase in other non-current liabilities	18.5
Real estate construction costs that were funded by Gaming and Leisure Properties, Inc. for the Hollywood Gaming at Dayton Raceway and Hollywood Gaming at Mahoning Valley Race Course facilities
Non-cash transactions
Increase in liabilities		$ 26.0
Increase to real property assets		$ 26.0
Remaining real estate construction costs for the Hollywood Gaming at Dayton Raceway and Hollywood Gaming at Mahoning Valley Race Course facilities
Non-cash transactions
Increase in liabilities	118.9
Increase to real property assets	118.9
Relocation fees for Hollywood Gaming at Dayton Raceway and Hollywood Gaming at Mahoning
Non-cash transactions
Increase in liabilities	150.0
Increase to other intangible assets	150.0
Unpaid gaming license fees for Hollywood Gaming at Dayton Raceway and Hollywood Gaming at Mahoning Valley Race Course
Non-cash transactions
Increase in liabilities	50.0
Increase to other intangible assets	$ 50.0

The increase in intangible assets classified as other, in noncash investing or financing activities.

No definition available.

Name:	penn_OtherIntangibleAssetsIncrease
Namespace Prefix:	penn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The increase in fair value of real property assets in noncash investing or financing activities.

+ References

No definition available.

+ Details

Name:	penn_RealPropertyAssetsIncrease
Namespace Prefix:	penn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The fair value of liabilities assumed in noncash investing or financing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

+ Details

Name:	us-gaap_LiabilitiesAssumed1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of liabilities that an entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition that are not presented as a separate disclosure or otherwise listed in the existing taxonomy. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

+ Details

Name:	us-gaap_NoncashOrPartNoncashAcquisitionOtherLiabilitiesAssumed1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The value of an asset or business acquired in a noncash (or part noncash) acquisition. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

+ Details

Name:	us-gaap_NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

- Details

Name:	us-gaap_OtherSignificantNoncashTransactionsByUniqueDescriptionAxis=penn_RealEstateConstructionCostsFundedByGamingAndLeisurePropertiesInc.ForHollywoodGamingAtDaytonRacewayAndHollywoodGamingAtMahoningValleyRaceCourseFacilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_OtherSignificantNoncashTransactionsByUniqueDescriptionAxis=penn_RemainingRealEstateConstructionCostsForHollywoodGamingAtDaytonRacewayAndHollywoodGamingAtMahoningValleyRaceCourseFacilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_OtherSignificantNoncashTransactionsByUniqueDescriptionAxis=penn_RelocationForHollywoodGamingAtDaytonRacewayAndHollywoodGamingAtMahoningMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_OtherSignificantNoncashTransactionsByUniqueDescriptionAxis=penn_UnpaidGamingLicenseForHollywoodGamingAtDaytonRacewayAndHollywoodGamingAtMahoningValleyRaceCourseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: