Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income (loss)	$ 2,046	$ 2,591	$ (2,220)
Other comprehensive (loss) income, net of tax:
Post-retirement benefits	21	50	18
Hedge instruments	(3)	(1)	3
Translation adjustments and other	(86)	124	(148)
Other comprehensive (loss) income, net of tax	(68)	173	(127)
Comprehensive income (loss)	1,978	2,764	(2,347)
Less: Comprehensive income (loss) attributable to non-controlling interests	532	177	(1,112)
Comprehensive income (loss) attributable to Icahn Enterprises	1,446	2,587	(1,235)
Limited partners
Net income (loss)	2,063	2,382	(1,106)
Other comprehensive (loss) income, net of tax:
Other comprehensive (loss) income, net of tax	(60)	154	(104)
Comprehensive income (loss) attributable to Icahn Enterprises	2,003	2,536	(1,210)
General partner
Net income (loss)	(556)	48	(22)
Other comprehensive (loss) income, net of tax:
Other comprehensive (loss) income, net of tax	(1)	3	(3)
Comprehensive income (loss) attributable to Icahn Enterprises	(557)	51	(25)
Icahn Enterprises Holdings
Net income (loss)	2,047	2,593	(2,219)
Other comprehensive (loss) income, net of tax:
Post-retirement benefits	21	50	18
Hedge instruments	(3)	(1)	3
Translation adjustments and other	(86)	124	(148)
Other comprehensive (loss) income, net of tax	(68)	173	(127)
Comprehensive income (loss)	1,979	2,766	(2,346)
Less: Comprehensive income (loss) attributable to non-controlling interests	532	177	(1,112)
Comprehensive income (loss) attributable to Icahn Enterprises	1,447	2,589	(1,234)
Icahn Enterprises Holdings | Limited partners
Net income (loss)	2,085	2,408	(1,116)
Other comprehensive (loss) income, net of tax:
Other comprehensive (loss) income, net of tax	(60)	155	(106)
Comprehensive income (loss) attributable to Icahn Enterprises	2,025	2,563	(1,222)
Icahn Enterprises Holdings | General partner
Net income (loss)	(577)	24	(11)
Other comprehensive (loss) income, net of tax:
Other comprehensive (loss) income, net of tax	(1)	2	(1)
Comprehensive income (loss) attributable to Icahn Enterprises	$ (578)	$ 26	$ (12)