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Description of Business	6 Months Ended
Description of Business	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	1. Description of Business Tenneco Inc. ("Tenneco" or "the Company") was formed under the laws of Delaware in 1996. Tenneco designs, manufactures, and sells products and services for light vehicle, commercial truck, off-highway, industrial, and aftermarket customers. The Company is one of the world's leading manufacturers of clean air, powertrain, and ride performance products and systems, and serves both original equipment manufacturers ("OEM") and replacement markets worldwide. On January 10, 2019, the Company completed the acquisition of a 90.5% ownership interest in Öhlins Intressenter AB (“Öhlins”, the "Öhlins Acquisition"), a Swedish technology company that develops premium suspension systems and components for the automotive and motorsport industries. On October 1, 2018, the Company completed the acquisition of a 100% ownership interest in Federal-Mogul LLC ("Federal-Mogul Acquisition," and together with the Öhlins Acquisition, the "Acquisitions"), a global supplier of technology and innovation in vehicle and industrial products for fuel economy, emissions reductions, and safety systems.