CONDENSED CONSOLIDATED STATEMENTS OF INCOME (LOSS) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues
Net sales and operating revenues	$ 4,484,000,000	$ 2,581,000,000
Costs and expenses
Cost of sales	3,864,000,000	2,193,000,000
Selling, general, and administrative	316,000,000	151,000,000
Depreciation and amortization	169,000,000	60,000,000
Engineering, research, and development	92,000,000	40,000,000
Restructuring charges and asset impairments	24,000,000	12,000,000
Goodwill impairment charge	60,000,000	0
Costs and expenses	4,525,000,000	2,456,000,000
Other expense (income)
Non-service pension and other postretirement benefit costs (credits)	2,000,000	3,000,000
Equity in (earnings) losses of nonconsolidated affiliates, net of tax	(16,000,000)	0
Other expense (income), net	(3,000,000)	0
Total other expense (income)	17,000,000	(3,000,000)
Earnings (loss) before interest expense, income taxes, and noncontrolling interests	(24,000,000)	122,000,000
Interest expense	81,000,000	23,000,000
Earnings (loss) before income taxes and noncontrolling interests	(105,000,000)	99,000,000
Income tax expense (benefit)	0	25,000,000
Net income (loss)	(105,000,000)	74,000,000
Less: Net income (loss) attributable to noncontrolling interests	12,000,000	14,000,000
Net income (loss) attributable to Tenneco Inc.	$ (117,000,000)	$ 60,000,000
Basic earnings (loss) per share:
Earnings (loss) per share (in dollars per share)	$ (1.44)	$ 1.17
Weighted average shares outstanding (in shares)	80,874,637	51,211,643
Diluted earnings (loss) per share:
Earnings (loss) per share (in dollars per share)	$ (1.44)	$ 1.17
Weighted average shares outstanding (in shares)	80,874,637	51,501,643