Summary of Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Redeemable Noncontrolling Interests

The following is a rollforward of activities in the Company's redeemable noncontrolling interests:

	Nine Months Ended September 30,
	2019			2018
Balance at beginning of period	$	138		$	42
Net income (loss) attributable to redeemable noncontrolling interests	19			22
Other comprehensive income (loss)	(10		)	(3		)
Acquisition and other	17			—
Purchase accounting measurement period adjustment	(8		)	—
Dividends declared	(17		)	(33		)
Balance at end of period	$	139		$	28

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

Actual weighted average shares outstanding used in calculating earnings (loss) per share were:

	Three Months Ended September 30,		Nine Months Ended September 30,
	2019	2018	2019	2018
Weighted average shares of common stock outstanding	80,916,676	51,272,618	80,903,967	51,247,664
Effect of dilutive securities:
Restricted stock, PSUs and RSUs	—	93,956	—	95,022
Stock options	—	35,255	—	53,241
Dilutive shares outstanding	80,916,676	51,401,829	80,903,967	51,395,927

Schedule of Error Corrections and Prior Period Adjustments

The following tables present the effects of these reclassifications and revisions for the condensed consolidated financial statement line items adjusted in the affected periods included within this quarterly report:

	Three Months Ended September 30, 2018
	As Reported		Reclasses			As Reclassified		Revisions			As Revised
Condensed consolidated statement of income (loss)
Revenues
Net sales and operating revenues	$	2,372	$	—		$	2,372	$	(1	)	$	2,371
Costs and expenses
Cost of sales	2,014		(12		)	2,002		—			2,002
Selling, general, and administrative	141		(4		)	137		1			138
Depreciation and amortization	65		—			65		(5		)	60
Engineering, research, and development	39		—			39		—			39
Restructuring charges, asset impairments, and other	—		16			16		—			16
	2,259		—			2,259		(4		)	2,255
Other expense (income)
Loss on sale of receivables	3		(3		)	—		—			—
Non-service pension and other postretirement benefit costs (credits)	—		4			4		—			4
Other expense (income), net	6		(4		)	2		(2		)	—
	9		(3		)	6		(2		)	4
Earnings (loss) before interest expense, income taxes, and noncontrolling interests	104		3			107		5			112
Interest expense	21		3			24		—			24
Earnings (loss) before income taxes and noncontrolling interests	83		—			83		5			88
Income tax expense (benefit)	20		—			20		2			22
Net income (loss)	63		—			63		3			66
Less: Net income (loss) attributable to noncontrolling interests	9		—			9		—			9
Net income (loss) attributable to Tenneco Inc.	$	54	$	—		$	54	$	3		$	57
Earnings (loss) per share
Basic earnings (loss) per share of common stock	$	1.05	$	—		$	1.05	$	0.06		$	1.11
Diluted earnings (loss) per share of common stock	$	1.05	$	—		$	1.05	$	0.06		$	1.11

	Three Months Ended September 30, 2018
	As Reported			Reclasses		As Reclassified			Revisions		As Revised
Condensed consolidated statement of comprehensive income (loss)
Net income (loss)	$	63		$	—	$	63		$	3	$	66
Other comprehensive income (loss)—net of tax
Foreign currency translation adjustment	(31		)	—		(31		)	—		(31		)
Defined benefit plans	4			—		4			—		4
	(27		)	—		(27		)	—		(27		)
Comprehensive income (loss)	36			—		36			3		39
Less: Comprehensive income (loss) attributable to noncontrolling interests	6			—		6			—		6
Comprehensive income (loss) attributable to common shareholders	$	30		$	—	$	30		$	3	$	33

	Nine Months Ended September 30, 2018
	As Reported		Reclasses			As Reclassified		Revisions			As Revised
Condensed consolidated statement of income (loss)
Revenues
Net sales and operating revenues	$	7,483	$	—		$	7,483	$	2		$	7,485
Costs and expenses
Cost of sales	6,371		(44		)	6,327		2			6,329
Selling, general, and administrative	450		(8		)	442		1			443
Depreciation and amortization	183		—			183		(3		)	180
Engineering, research, and development	122		(5		)	117		1			118
Restructuring charges, asset impairments, and other	—		57			57		—			57
	7,126		—			7,126		1			7,127
Other expense (income)
Loss on sale of receivables	8		(8		)	—		—			—
Non-service pension and other postretirement benefit costs (credits)	—		10			10		—			10
Other expense (income), net	15		(10		)	5		(2		)	3
	23		(8		)	15		(2		)	13
Earnings (loss) before interest expense, income taxes, and noncontrolling interests	334		8			342		3			345
Interest expense	61		8			69		—			69
Earnings (loss) before income taxes and noncontrolling interests	273		—			273		3			276
Income tax expense (benefit)	72		—			72		1			73
Net income (loss)	201		—			201		2			203
Less: Net income (loss) attributable to noncontrolling interests	39		—			39		—			39
Net income (loss) attributable to Tenneco Inc.	$	162	$	—		$	162	$	2		$	164
Earnings (loss) per share
Basic earnings (loss) per share of common stock	$	3.17	$	—		$	3.17	$	0.03		$	3.20
Diluted earnings (loss) per share of common stock	$	3.16	$	—		$	3.16	$	0.04		$	3.20

	Nine Months Ended September 30, 2018
	As Reported			Reclasses		As Reclassified			Revisions		As Revised
Condensed consolidated statement of comprehensive income (loss)
Net income (loss)	$	201		$	—	$	201		$	2	$	203
Other comprehensive income (loss)—net of tax
Foreign currency translation adjustment	(104		)	—		(104		)	1		(103		)
Defined benefit plans	11			—		11			—		11
	(93		)	—		(93		)	1		(92		)
Comprehensive income (loss)	108			—		108			3		111
Less: Comprehensive income (loss) attributable to noncontrolling interests	37			—		37			—		37
Comprehensive income (loss) attributable to common shareholders	$	71		$	—	$	71		$	3	$	74

	Nine Months Ended September 30, 2018
	As Reported			Reclasses			As Reclassified			Revisions			As Revised
Condensed consolidated statements of cash flow
Operating Activities
Net income (loss)	$	201		$	—		$	201		$	2		$	203
Net cash provided by (used by) operating activities	37			—			37			—			37
Investing Activities
Net cash used by investing activities	(149		)	—			(149		)	—			(149		)
Financing Activities
Proceeds from term loans and notes	—			—			—			12			12
Repayments of term loans and notes	—			(17		)	(17		)	(18		)	(35		)
Retirement of long-term debt	(17		)	17			—			—			—
Borrowings on revolving lines of credit	—			—			—			4,051			4,051
Payments on revolving lines of credit	—			—			—			(4,074		)	(4,074		)
Net increase (decrease) in revolver borrowings	(29		)	—			(29		)	29			—
Issuance (repurchase) of common shares	(2		)	—			(2		)	—			(2		)
Cash dividends	(39		)	—			(39		)	—			(39		)
Debt issuance cost of long-term debt	(2		)	2			—			—			—
Purchase of common stock under the share repurchase program	—			—			—			—			—
Net increase (decrease) in bank overdrafts	(5		)	—			(5		)	—			(5		)
Net increase (decrease) in short-term borrowings secured by accounts receivable	150			—			150			—			150
Other	—			(2		)	(2		)	—			(2		)
Distributions to noncontrolling interest partners	(44		)	—			(44		)	—			(44		)
Net cash provided by (used by) financing activities	12			—			12			—			12
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash	(15		)	—			(15		)	—			(15		)
Increase (decrease) in cash, cash equivalents and restricted cash	(115		)	—			(115		)	—			(115		)
Cash, cash equivalents and restricted cash, beginning of period	318			—			318			—			318
Cash, cash equivalents and restricted cash, end of period	$	203		$	—		$	203		$	—		$	203

	Three Months Ended September 30, 2018
	As Reported			Revisions			As Revised
Condensed consolidated statements of changes in shareholders' equity
Accumulated Deficit
Balance June 30	$	(864	)	$	(64	)	$	(928	)
Net income (loss) attributable to Tenneco Inc.	54			3			57
Cash dividends declared	(14		)	—			(14		)
Adjustments to adopt new accounting standards	—			1			1
Balance September 30	$	(824	)	$	(60	)	$	(884	)
Accumulated Other Comprehensive Income (loss)
Balance June 30	$	(608	)	$	4		$	(604	)
Other comprehensive income (loss)—net of tax:
Foreign currency translation adjustment	(27		)	(1		)	(28		)
Defined benefit plans	4			—			4
Balance September 30	$	(631	)	$	3		$	(628	)
Total Tenneco Inc. Shareholders' Equity
Balance June 30	$	717		$	(60	)	$	657
Net income (loss) attributable to Tenneco Inc.	54			3			57
Other comprehensive income (loss)—net of tax:
Foreign currency translation adjustment	(27		)	(1		)	(28		)
Defined benefit plans	4			—			4
Comprehensive income (loss)	31			2			33
Adjustments to adopt new accounting standards	—			1			1
Cash dividends declared	(14		)	—			(14		)
Stock-based compensation, net	3			—			3
Balance September 30	$	737		$	(57	)	$	680
Total Equity
Balance June 30	$	761		$	(60	)	$	701
Net income (loss)	57			3			60
Other comprehensive income (loss)—net of tax:
Foreign currency translation adjustment	(28		)	(1		)	(29		)
Defined benefit plans	4			—			4
Comprehensive income (loss)	33			2			35
Adjustments to adopt new accounting standards	—			1			1
Cash dividends declared	(14		)	—			(14		)
Distributions declared to noncontrolling interests	(8		)	—			(8		)
Stock-based compensation, net	3			—			3
Balance September 30	$	775		$	(57	)	$	718

	Nine Months Ended September 30, 2018
	As Reported			Revisions			As Revised
Condensed consolidated statements of changes in shareholders' equity
Accumulated Deficit
Balance January 1	$	(946	)	$	(63	)	$	(1,009	)
Net income (loss) attributable to Tenneco Inc.	162			2			164
Cash dividends declared	(39		)	—			(39		)
Adjustments to adopt new accounting standards	(1		)	1			—
Balance September 30	$	(824	)	$	(60	)	$	(884	)
Accumulated Other Comprehensive Income (loss)
Balance January 1	$	(541	)	$	3		$	(538	)
Other comprehensive income (loss)—net of tax:
Foreign currency translation adjustment	(101		)	—			(101		)
Defined benefit plans	11			—			11
Balance September 30	$	(631	)	$	3		$	(628	)
Total Tenneco Inc. Shareholders' Equity
Balance January 1	$	696		$	(60	)	$	636
Net income (loss) attributable to Tenneco Inc.	162			2			164
Other comprehensive income (loss)—net of tax:
Foreign currency translation adjustment	(101		)	—			(101		)
Defined benefit plans	11			—			11
Comprehensive income (loss)	72			2			74
Adjustments to adopt new accounting standards	(1		)	1			—
Cash dividends declared	(39		)	—			(39		)
Stock-based compensation, net	9			—			9
Balance September 30	$	737		$	(57	)	$	680
Total Equity
Balance January 1	$	742		$	(60	)	$	682
Net income (loss)	179			2			181
Other comprehensive income (loss)—net of tax:
Foreign currency translation adjustment	(100		)	—			(100		)
Defined benefit plans	11			—			11
Comprehensive income (loss)	90			2			92
Adjustments to adopt new accounting standards	(1		)	1			—
Cash dividends declared	(39		)	—			(39		)
Distributions declared to noncontrolling interests	(26		)	—			(26		)
Stock-based compensation, net	9			—			9
Balance September 30	$	775		$	(57	)	$	718