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Condensed Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Accumulated other comprehensive loss $ 1,398us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax $ 1,293us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Icahn Enterprises Holdings [Member]    
Accumulated other comprehensive loss $ 1,398us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
$ 1,293us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember