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Income Taxes Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Tax Contingency [Line Items]
Income tax expense	$ 22	$ (19)	$ 184	$ 166
Income before income tax expense	$ (918)	$ (646)	$ 207	$ 739
Effective income tax rate	(2.40%)	2.90%	88.90%	22.50%
Statutory federal income tax rate	35.00%		35.00%
Icahn Enterprises Holdings [Member]
Income Tax Contingency [Line Items]
Income tax expense	$ 22	$ (19)	$ 184	$ 166
Income before income tax expense	$ (918)	$ (646)	$ 208	$ 740
Effective income tax rate			88.50%	22.40%

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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