Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Supplemental cash flow information [Line Items]
Cash payments for interest, net of amounts capitalized		$ (382)	$ (400)
Cash receipts (payments) for income taxes, net of payments		11	$ (58)
Non-cash Investment segment contributions from non-controlling interests		$ 1,240
Icahn Enterprises Holdings
Supplemental cash flow information [Line Items]
Non-cash distribution to limited partner	$ 32