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Operating Units Gaming Segment (Details) (Tropicana [Member])
 3 Months Ended
Mar. 31, 2015
sqft
casinos
slot_machines
hotel_rooms
table_games
Segment Reporting Information [Line Items]  
Number of casinos 8iep_NumberOfCasinos
Square footage of casino space 391,000iep_CasinoSpaceSquareFootage
Number of slot machines 8,000iep_NumberOfSlotMachines
Number of table games 300iep_NumberOfTableGames
Number of hotel rooms 5,500iep_NumberOfHotelRooms
Percentage of equity ownership in subsidiary 67.90%us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest
MISSOURI
  
Segment Reporting Information [Line Items]  
Number of casinos 1iep_NumberOfCasinos
/ dei_LegalEntityAxis
= iep_TropicanaMember
/ iep_LocationOfOperationsStateOrCountryAxis
= stpr_MO
LOUISIANA
  
Segment Reporting Information [Line Items]  
Number of casinos 1iep_NumberOfCasinos
/ dei_LegalEntityAxis
= iep_TropicanaMember
/ iep_LocationOfOperationsStateOrCountryAxis
= stpr_LA
NEVADA
  
Segment Reporting Information [Line Items]  
Number of casinos 2iep_NumberOfCasinos
/ dei_LegalEntityAxis
= iep_TropicanaMember
/ iep_LocationOfOperationsStateOrCountryAxis
= stpr_NV
INDIANA
  
Segment Reporting Information [Line Items]  
Number of casinos 1iep_NumberOfCasinos
/ dei_LegalEntityAxis
= iep_TropicanaMember
/ iep_LocationOfOperationsStateOrCountryAxis
= stpr_IN
NEW JERSEY
  
Segment Reporting Information [Line Items]  
Number of casinos 1iep_NumberOfCasinos
/ dei_LegalEntityAxis
= iep_TropicanaMember
/ iep_LocationOfOperationsStateOrCountryAxis
= stpr_NJ
ARUBA
  
Segment Reporting Information [Line Items]  
Number of casinos 1iep_NumberOfCasinos
/ dei_LegalEntityAxis
= iep_TropicanaMember
/ iep_LocationOfOperationsStateOrCountryAxis
= country_AW
MISSISSIPPI
  
Segment Reporting Information [Line Items]  
Number of casinos 1iep_NumberOfCasinos
/ dei_LegalEntityAxis
= iep_TropicanaMember
/ iep_LocationOfOperationsStateOrCountryAxis
= stpr_MS