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Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	9 Months Ended
	Sep. 30, 2020	Jun. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Tenneco \| Class A
Related Party Transaction [Line Items]
Ownership percentage		5.00%
Icahn Enterprises L.P.
Related Party Transaction [Line Items]
Net sales	$ 59	$ 71	$ 124
Royalty and other income (expense)	1	2	4
Receivables				$ 47
Payables and accruals				$ 9
Icahn Enterprises L.P. \| Allocation of Certain Tax Credits
Related Party Transaction [Line Items]
Related party transaction	3		3
PSC Metals, Inc
Related Party Transaction [Line Items]
Royalty and other income (expense)	$ 1	$ 2	$ 4