Operating Units Energy Segment (Details) ft³ / d in Millions, bbl in Millions, $ in Millions							12 Months Ended
	Jul. 24, 2014 USD ($)	Jun. 30, 2014 USD ($)	May. 29, 2013 USD ($)	May. 21, 2013 USD ($)	Jan. 30, 2013 USD ($)	Jan. 23, 2013 USD ($)	Dec. 31, 2015 USD ($) ft³ / d bbl / d T / d miles bbl	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Segment Reporting Information [Line Items]
Proceeds from subsidiary equity offerings							$ 31	$ 160	$ 1,056
Energy Segment [Member]
Segment Reporting Information [Line Items]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance								160
CVR Refining, LP [Member]
Segment Reporting Information [Line Items]
Percentage of equity ownership in subsidiary							4.00%
CVR Refining, LP [Member] \| Energy Segment [Member]
Segment Reporting Information [Line Items]
Percentage of equity ownership in subsidiary							66.00%
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	$ 15	$ 170		$ 406	$ 90	$ 600
Proceeds from subsidiary equity offerings									990
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Purchase of Interest by Parent				$ 62		$ 100
CVR Partners, LP [Member] \| Energy Segment [Member]
Segment Reporting Information [Line Items]
Percentage of equity ownership in subsidiary							53.00%
Noncontrolling Interest, Increase from Subsidiary Equity Issuance			$ 302
CVR Energy, Inc. [Member]
Segment Reporting Information [Line Items]
Percentage of equity ownership in subsidiary							82.00%
Crude Oil Gathering [Member] \| Energy Segment [Member]
Segment Reporting Information [Line Items]
Production, Barrels of Oil Per Day \| bbl / d							65,000
Nitrogen Fertilizer [Member] \| Energy Segment [Member]
Segment Reporting Information [Line Items]
Production, Tons of Ammonia Per Day \| T / d							1,300
Production, Tons of Urea and Ammonium Nitrate Per Day \| T / d							3,000
Production, Cubic Feet of Hydrogen Per Day \| ft³ / d							89
Cushing, Oklahoma [Member] \| Petroleum [Member] \| Energy Segment [Member]
Segment Reporting Information [Line Items]
Production, Barrels of Oil, Storage Capacity \| bbl							7.0
Production, Barrels of Oil, Combined Refinery Related Storage Capacity \| bbl							4.5
Coffeyville, Kansas [Member] \| Energy Segment [Member]
Segment Reporting Information [Line Items]
Acres of land							440
Coffeyville, Kansas [Member] \| Petroleum [Member] \| Energy Segment [Member]
Segment Reporting Information [Line Items]
Production, Barrels of Oil Per Day \| bbl / d							115,000
Coffeyville, Kansas [Member] \| 486110 Pipeline Transportation of Crude Oil [Member] \| Energy Segment [Member]
Segment Reporting Information [Line Items]
Production, Barrels of Oil Per Day \| bbl / d							170,000
Crude Oil Pipeline, Length, Miles \| miles							336
Wynnewood, Oklahoma [Member] \| Petroleum [Member] \| Energy Segment [Member]
Segment Reporting Information [Line Items]
Production, Barrels of Oil Per Day \| bbl / d							70,000
Non-controlling Interests
Segment Reporting Information [Line Items]
Proceeds from subsidiary equity offerings							$ 31	150	966
Non-controlling Interests \| Energy Segment [Member]
Segment Reporting Information [Line Items]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance								150
Non-controlling Interests \| CVR Refining, LP [Member] \| Energy Segment [Member]
Segment Reporting Information [Line Items]
Proceeds from subsidiary equity offerings									902
Total Partners' Equity
Segment Reporting Information [Line Items]
Proceeds from subsidiary equity offerings							$ 0	10	90
Total Partners' Equity \| Energy Segment [Member]
Segment Reporting Information [Line Items]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance								$ 10
Total Partners' Equity \| CVR Refining, LP [Member] \| Energy Segment [Member]
Segment Reporting Information [Line Items]
Proceeds from subsidiary equity offerings									$ 88
Secondary offering [Member] \| CVR Refining, LP [Member] \| Energy Segment [Member]
Segment Reporting Information [Line Items]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	$ 10

ICAHN ENTERPRISES HOLDINGS L.P. 10-K