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Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) (USD $) In Millions, unless otherwise specified | Mar. 31, 2012 | Dec. 31, 2011
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Accumulated other comprehensive loss | $ 748 | $ 855

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- Definition Accumulated other comprehensive loss + References No definition available. + Details
Name: | iep_AccumulatedOtherComprehensiveLoss
Namespace Prefix: | iep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant