Acquisitions -Transfers to Noncontrolling Interest (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Business Combinations [Abstract]
Net income attributable to Tenneco Inc.	$ 21	$ 78	$ 81	$ 46	$ 54	$ 12	$ 63	$ 54	$ 226	$ 183	$ 275
Decrease in equity for purchase of noncontrolling equity interest				(1)					0	(68)	0
Net income attributable to Tenneco Inc. shareholders less purchase of noncontrolling equity interest									$ 226	$ 115	$ 275