Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental cash flow information [Line Items]
Cash payments for interest, net of amounts capitalized	$ 524	$ 484	$ 499
Net cash (receipts) payments for income taxes, net of refunds	64	20	39
Equity investment consideration received from sale of business	0	1,241	0
Acquisition of subsidiary common stock included in accrued expenses and other liabilities	0	0	51
Seller financing secured mortgages resulting from disposition of assets	0	$ 0	$ 375
Icahn Enterprises Holdings
Supplemental cash flow information [Line Items]
Non-cash distribution to limited partner	$ 32