CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues
Net sales and operating revenues	$ 2,067	$ 1,920	$ 3,970	$ 3,832
Costs and expenses
Cost of sales (exclusive of depreciation and amortization shown below)	1,736	1,595	3,340	3,202
Engineering, research, and development	33	28	68	66
Selling, general, and administrative	106	109	225	227
Depreciation and amortization of other intangibles	50	50	100	99
Costs and expenses	1,925	1,782	3,733	3,594
Other expense
Loss on sale of receivables	(1)	(1)	(2)	(2)
Other	0	0	(1)	(3)
Total other income (expense)	(1)	(1)	(3)	(5)
Earnings before interest expense, income taxes, and noncontrolling interests	141	137	234	233
Interest expense (net of interest capitalized of $1 million in both of the three months ended June 30, 2013 and 2012, respectively, and $2 million in both of the six months ended June 30, 2013 and 2012, respectively)	20	21	40	63
Earnings before income taxes and noncontrolling interests	121	116	194	170
Income tax expense	47	21	59	39
Net income	74	95	135	131
Less: Net income attributable to noncontrolling interests	11	8	18	14
Net income attributable to Tenneco Inc.	$ 63	$ 87	$ 117	$ 117
Weighted average shares of common stock outstanding —
Basic (in shares)	60,542,361	59,992,055	60,424,540	60,067,205
Diluted (in shares)	61,724,124	61,260,871	61,532,550	61,470,513
Basic earnings per share of common stock (in dollars per share)	$ 1.04	$ 1.45	$ 1.94	$ 1.95
Diluted earnings per share of common stock (in dollars per share)	$ 1.02	$ 1.42	$ 1.91	$ 1.90