Schedule I Condensed Financial Information of Parent - Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash and cash equivalents	$ 2,656	$ 1,164
Restricted cash	2,682	747
Investments	8,337	10,015
Other assets	1,020	846
Total Assets	23,396	31,801
Accrued expenses and other liabilities	900	984
Debt	7,326	7,372
Total liabilities	10,491	20,433
Commitments and contingencies (Note 3)
Limited partners: Depositary units: 191,366,097 and 173,564,307 units issued and outstanding at December 31, 2018 and 2017, respectively	7,319	5,341
General partner	(790)	(235)
Total equity	12,905	11,368	$ 8,017	$ 10,033
Total Liabilities and Equity	23,396	31,801
Icahn Enterprises (Parent)
Investments in subsidiaries, net	12,158	10,737
Total Assets	12,158	10,737
Accrued expenses and other liabilities	124	124
Debt	5,505	5,507
Total liabilities	5,629	5,631
Commitments and contingencies (Note 3)
Limited partners: Depositary units: 191,366,097 and 173,564,307 units issued and outstanding at December 31, 2018 and 2017, respectively	7,319	5,341
General partner	(790)	(235)
Total equity	6,529	5,106
Total Liabilities and Equity	12,158	10,737
Icahn Enterprises Holdings (Parent)
Cash and cash equivalents	30	241
Restricted cash	29	0
Investments	723	1
Other assets	60	84
Investments in subsidiaries, net	11,355	10,467
Total Assets	12,197	10,793
Accrued expenses and other liabilities	131	128
Debt	5,509	5,532
Total liabilities	5,640	5,660
Commitments and contingencies (Note 3)
Limited partners: Depositary units: 191,366,097 and 173,564,307 units issued and outstanding at December 31, 2018 and 2017, respectively	7,421	5,420
General partner	(864)	(287)
Total equity	6,557	5,133
Total Liabilities and Equity	$ 12,197	$ 10,793