Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Supplemental cash flow information [Line Items]
Cash payments for interest, net of amounts capitalized	$ (507)	$ (524)	$ (484)
Cash receipts (payments) for income taxes, net of payments	22	(64)	(20)
Non-cash consideration for obtaining a controlling interest in subsidiary	(249)
Non-cash Investment segment contributions from non-controlling interests	$ 1,240
Equity investment consideration received from sale of business			$ 1,241
Icahn Enterprises Holdings
Supplemental cash flow information [Line Items]
Non-cash distribution to limited partner		$ 32