Acquisition Of Outstanding Common Stock Voting, Percentage1

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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Shareholders' Equity - Share Conversion (Details) - shares	Apr. 15, 2020	Apr. 01, 2020
Class B
Conversion of Stock [Line Items]
Shares converted (in shares)		3,485,215
Class A
Conversion of Stock [Line Items]
Shares issued upon conversion (in shares)		3,485,215
Tenneco \| Class A
Conversion of Stock [Line Items]
Acquisition of outstanding common stock voting percentage	4.90%
Tenneco \| Icahn Enterprises L.P. \| Class B
Conversion of Stock [Line Items]
Shares owned (in shares)		20,308,454
Tenneco \| Icahn Enterprises L.P. \| Class A
Conversion of Stock [Line Items]
Shares owned (in shares)		9,136,392
Ownership percentage		14.99%