Tenneco (TEN) 10-K 18 Mar 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2018	Mar. 11, 2019	Jun. 30, 2018
Document Information [Line Items]
Entity Registrant Name	TENNECO INC
Entity Central Index Key	0001024725
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Trading Symbol	TEN
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 2.2
Class A
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		57,126,127
Class B
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		23,793,669

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues
Net sales and operating revenues	$ 4,278	$ 2,371	$ 2,533	$ 2,581	$ 2,389	$ 2,273	$ 2,314	$ 2,298	$ 11,763	$ 9,274	$ 8,597
Costs and expenses
Cost of sales (exclusive of depreciation and amortization)	3,698	2,014	2,157	2,202	2,019	1,912	1,949	1,932	10,071	7,812	7,126
Selling, general, and administrative									794	638	514
Depreciation and amortization									345	226	213
Engineering, research, and development									204	158	153
Goodwill impairment charge									3	11	0
Costs and expenses									11,417	8,845	8,006
Other expense (income)
Loss on sale of receivables									16	5	5
Non-service pension and postretirement benefit costs									20	16	84
Loss on extinguishment of debt									10	1	24
Equity in (earnings) losses of nonconsolidated affiliates, net of tax									(18)	1	0
Other expense (income), net									12	(2)	(1)
Total other expense (income)									40	21	112
Earnings before interest expense, income taxes, and noncontrolling interests	(31)	109	109	119	132	131	23	122	306	408	479
Interest expense									132	72	68
Earnings before income taxes and noncontrolling interests									174	336	411
Income tax expense (benefit)									63	71	(4)
Net income									111	265	415
Less: Net income attributable to noncontrolling interests									56	67	68
Net income attributable to Tenneco Inc.	$ (109)	$ 57	$ 47	$ 60	$ 62	$ 80	$ (5)	$ 61	$ 55	$ 198	$ 347
Weighted average shares of common stock outstanding —
Basic (in shares)									58,625,087	52,796,184	55,939,135
Diluted (in shares)									58,758,732	53,026,911	56,407,436
Basic earnings per share of common stock (in dollars per share)	$ (1.35)	$ 1.11	$ 0.92	$ 1.17	$ 1.19	$ 1.53	$ (0.09)	$ 1.13	$ 0.93	$ 3.75	$ 6.20
Diluted earnings per share of common stock (in dollars per share)	$ (1.35)	$ 1.11	$ 0.92	$ 1.17	$ 1.19	$ 1.53	$ (0.09)	$ 1.12	$ 0.93	$ 3.73	$ 6.15

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 111	$ 265	$ 415
Other comprehensive income (loss)—net of tax
Foreign currency translation adjustment	(134)	106	(56)
Defined benefit plans	(22)	17	51
Other comprehensive income (loss), net of tax	(156)	123	(5)
Comprehensive income (loss)	(45)	388	410
Less: Comprehensive income (loss) attributable to noncontrolling interests	54	69	64
Comprehensive income (loss) attributable to common shareholders	$ (99)	$ 319	$ 346

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 697	$ 315
Restricted cash	5	3
Receivables:
Customer notes and accounts, net	2,487	1,294
Other	85	27
Inventories	2,245	820
Prepayments and other current assets	590	288
Total current assets	6,109	2,747
Property, plant and equipment, net	3,501	1,691
Long-term receivables, net	10	9
Goodwill	869	49
Intangibles, net	1,519	22
Investments in nonconsolidated affiliates	544	2
Deferred income taxes	467	213
Other assets	213	63
Total assets	13,232	4,796
Current liabilities:
Short-term debt, including current maturities of long-term debt	153	103
Accounts payable	2,759	1,582
Accrued compensation and employee benefits	343	141
Accrued income taxes	64	27
Accrued expenses and other current liabilities	1,001	424
Total current liabilities	4,320	2,277
Long-term debt	5,340	1,358
Deferred income taxes	88	11
Pension and postretirement benefits	1,167	268
Deferred credits and other liabilities	263	158
Commitments and contingencies
Total liabilities	11,178	4,072
Redeemable noncontrolling interests	138	42
Tenneco Inc. shareholders’ equity:
Preferred stock—$0.01 par value; none issued	0	0
Additional paid-in capital	4,360	3,112
Accumulated other comprehensive loss	(692)	(538)
Accumulated deficit	(1,013)	(1,009)
Shareholders equity before deduction of treasury stock	2,656	1,566
Shares held as treasury stock—at cost: 2018 and 2017—14,592,888 shares	(930)	(930)
Total Tenneco Inc. shareholders’ equity	1,726	636
Noncontrolling interests	190	46
Total equity	1,916	682
Total liabilities, redeemable noncontrolling interests and equity	13,232	4,796
Class A
Tenneco Inc. shareholders’ equity:
Common stock	1	1
Class B
Tenneco Inc. shareholders’ equity:
Common stock	$ 0	$ 0

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Treasury stock	14,592,888	14,592,888
Class A
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares issued (in shares)	71,675,379	66,033,509
Treasury stock	14,592,888
Class B
Common stock, par value (in dollars per share)	$ 0.01
Common stock, shares issued (in shares)	23,793,669

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Operating Activities
Net income		$ 111,000,000		$ 265,000,000		$ 415,000,000
Adjustments to reconcile net income to cash provided by operating activities:
Goodwill impairment charge		3,000,000		11,000,000		0
Depreciation and amortization		345,000,000		226,000,000		213,000,000
Deferred income taxes		(65,000,000)		(8,000,000)		(84,000,000)
Stock-based compensation		14,000,000		14,000,000		14,000,000
Restructuring charges and asset impairments, net of cash paid		49,000,000		8,000,000		(13,000,000)
Change in pension and postretirement benefit plans		(8,000,000)		(15,000,000)		47,000,000
Equity in earnings of nonconsolidated affiliates		(18,000,000)		1,000,000		0
Cash dividends received from nonconsolidated affiliates		2,000,000		0		0
Loss on sale of assets		16,000,000		5,000,000		4,000,000
Changes in operating assets and liabilities:
Receivables		(190,000,000)		(81,000,000)		(325,000,000)
Inventories		27,000,000		(94,000,000)		(55,000,000)
Payables and accrued expenses		291,000,000		136,000,000		140,000,000
Accrued interest and income taxes		(19,000,000)		1,000,000		13,000,000
Other assets and liabilities		(119,000,000)		48,000,000		5,000,000
Net cash provided by operating activities		439,000,000		517,000,000		374,000,000
Investing Activities
Federal-Mogul acquisition, net of cash acquired		(2,194,000,000)		0		0
Proceeds from sale of assets		9,000,000		8,000,000		6,000,000
Proceeds from sale of equity interest		0		9,000,000		0
Cash payments for plant, property, and equipment		(507,000,000)		(419,000,000)		(345,000,000)
Proceeds from deferred purchase price of factored receivables		174,000,000		112,000,000		110,000,000
Other		4,000,000		(10,000,000)		0
Net cash used by investing activities		(2,514,000,000)		(300,000,000)		(229,000,000)
Financing Activities
Proceeds from term loans and notes		3,426,000,000		160,000,000		529,000,000
Repayments of term loans and notes		(453,000,000)		(36,000,000)		(545,000,000)
Borrowings on revolving lines of credit		5,149,000,000		6,664,000,000		5,417,000,000
Payments on revolving lines of credit		(5,405,000,000)		(6,737,000,000)		(5,221,000,000)
Issuance (repurchase) of common shares		(1,000,000)		(1,000,000)		13,000,000
Cash dividends		(59,000,000)		(53,000,000)		0
Debt issuance cost of long-term debt		(95,000,000)		(8,000,000)		(9,000,000)
Purchase of common stock under the share repurchase program		0		(169,000,000)		(225,000,000)
Net increase (decrease) in bank overdrafts		(5,000,000)		(7,000,000)		10,000,000
Other		(30,000,000)		0		0
Distributions to noncontrolling interest partners		(51,000,000)		(64,000,000)		(55,000,000)
Net cash provided (used) by financing activities		2,476,000,000		(251,000,000)		(86,000,000)
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash		(17,000,000)		3,000,000		2,000,000
Increase (decrease) in cash, cash equivalents and restricted cash		384,000,000		(31,000,000)		61,000,000
Cash, cash equivalents and restricted cash, January 1		318,000,000	[1]	349,000,000	[1]	288,000,000
Cash, cash equivalents and restricted cash, December 31	[1]	702,000,000		318,000,000		349,000,000
Supplemental Cash Flow Information
Cash paid during the year for interest		143,000,000		78,000,000		76,000,000
Cash paid during the year for income taxes, net of refunds		113,000,000		95,000,000		113,000,000
Non-cash Investing and Financing Activities
Period end balance of trade payables for plant, property, and equipment		135,000,000		59,000,000		68,000,000
Deferred purchase price of receivables factored in period		154,000,000		114,000,000		109,000,000
Stock issued for acquisition of Federal-Mogul		0		0		0
Stock transferred for acquisition of Federal-Mogul		$ 1,236		$ 0		$ 0
[1]	Cash and cash equivalents include highly liquid investments with a maturity of three months or less at the date of purchase.

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Total	Total Tenneco Inc. Shareholders' Equity	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Treasury Stock	Noncontrolling Interests	Total Equity
Beginning Balance (in shares) at Dec. 31, 2015			1
Balance at beginning of year at Dec. 31, 2015		$ 387		$ 3,081	$ (658)	$ (1,501)	$ (536)	$ 39	$ 426
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 415	347				347		32	379
Foreign currency translation adjustments—net	(56)	(52)			(52)			(2)	(54)
Defined benefit plans—net	51	51			51				51
Other comprehensive income (loss), net of tax	(5)	346						30	376
Stock-based compensation expense		17		17					17
Purchases of treasury stock		(225)					(225)		(225)
Distributions declared to noncontrolling interests								(22)	(22)
Balance at end of period at Dec. 31, 2016		525	$ 1	3,098	(659)	(1,154)	(761)	47	572
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	265	198				198		31	229
Foreign currency translation adjustments—net	106	104			104			(1)	103
Defined benefit plans—net	17	17			17				17
Other comprehensive income (loss), net of tax	123	319						30	349
Stock-based compensation expense		14		14					14
Cash dividends ($1.00 per share)		(53)				(53)			(53)
Purchases of treasury stock		(169)					(169)		(169)
Distributions declared to noncontrolling interests								(31)	(31)
Balance at end of period at Dec. 31, 2017	682	636	1	3,112	(538)	(1,009)	(930)	46	682
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	111	55				55		27	82
Foreign currency translation adjustments—net	(134)	(132)			(132)				(132)
Defined benefit plans—net	(22)	(22)			(22)				(22)
Other comprehensive income (loss), net of tax	(156)	(99)						27	(72)
Common stock issued		1,236		1,236					1,236
Federal-Mogul Acquisition								143	143
Stock-based compensation expense		12		12					12
Cash dividends ($1.00 per share)		(59)				(59)			(59)
Distributions declared to noncontrolling interests								(26)	(26)
Balance at end of period at Dec. 31, 2018	$ 1,916	$ 1,726	$ 1	$ 4,360	$ (692)	$ (1,013)	$ (930)	$ 190	$ 1,916

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated deficit	$ (1,013)		$ (1,009)
ASU 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect		$ 1
ASU 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated deficit		(1,008)
Adjustment | ASU 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated deficit		$ 1

Description of Business

Description of Business	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	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. Effective October 1, 2018, the Company completed the acquisition (the "Acquisition") of Federal-Mogul LLC ("Federal-Mogul"), a global supplier of technology and innovation in vehicle and industrial products for fuel economy, emissions reductions, and safety systems. Federal-Mogul serves the world’s foremost OEM and servicers (“OES”, and together with OEM, “OE”) of automotive, light, medium and heavy-duty commercial vehicles, off road, agricultural, marine, rail, aerospace, power generation, and industrial equipment, as well as the worldwide aftermarket. The Company expects to separate its businesses to form two new, independent publicly traded companies, an Aftermarket and Ride Performance company and a new Powertrain Technology company, in the second half of 2019.

Summary of Accounting Policies

Summary of Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States ("U.S. GAAP"). Revision of Previously Issued Financial Statements The Company identified an error in the accounting for certain costs capitalized into inventory that did not constitute inventoriable costs in its historical financial statements. Costs incorrectly capitalized in ending inventory were $49 million and $42 million as of December 31, 2017 and 2016. The Company evaluated the effect of this item as well as the items discussed below on prior periods under the guidance of SEC Staff Accounting Bulletin (SAB) No. 99, “Materiality” and determined the amounts were not material, individually or in the aggregate, to previously issued financial statements. The Company also evaluated the effect of correcting these items through a cumulative adjustment to our financial statements and concluded, based on the guidance within SEC SAB No. 108, “Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements”, it was appropriate to revise our previously issued financial statements to correct these errors. The Company also revised for other immaterial errors including (i) capitalization errors related to construction-in-process; (ii) errors related to the estimation of warranty and rebate liabilities; (iii) errors related to the cash flow presentation for borrowings and repayments on revolving lines of credit (net versus gross); (iv) errors related to currency on certain non-income tax transactions; and (v) errors surrounding the misclassification of translation adjustments within accumulated other comprehensive income. These adjustments related to various line items as shown in the tables below. As a result, certain amounts in the consolidated financial statements have been revised, and will be revised for interim periods in future filings, in order to correct for these errors. These revisions have also been reflected in Note 22, Quarterly Financial Data (Unaudited) to show the effects in the unaudited quarterly financial statements. Reclassifications: Certain amounts in the prior years have been aggregated or disaggregated to conform to current year presentation. These reclassifications have no effect on previously reported earnings before income taxes and noncontrolling interests or net income, other comprehensive income (loss), current or total assets, current or total liabilities, and the cash provided (used) by operating, investing or financing activities within the consolidated statements of cash flows. The following tables present the effect of these reclassifications and revisions for the financial statement line items adjusted in the affected periods included within this annual financial report: Year Ended December 31, 2017 As Reported Reclasses As Reclassified Revisions As Revised (Millions, except per share amounts) Consolidated statement of income Revenues Net sales and operating revenues $ 9,274 $ — $ 9,274 $ — $ 9,274 Costs and expenses Cost of sales (exclusive of depreciation and amortization) 7,809 — 7,809 3 7,812 Selling, general, and administrative 636 — 636 2 638 Depreciation and amortization 224 — 224 2 226 Engineering, research, and development 158 — 158 — 158 Goodwill impairment charge 11 — 11 — 11 8,838 — 8,838 7 8,845 Other expense (income) Loss on sale of receivables 5 — 5 — 5 Non-service pension and postretirement benefit costs — 16 16 — 16 Loss on extinguishment of debt — 1 1 — 1 Equity in (earnings) losses of nonconsolidated affiliates, net of tax — 1 1 — 1 Other expense (income), net 14 (17 ) (3 ) 1 (2 ) 19 1 20 1 21 Earnings before interest expense, income taxes, and noncontrolling interests 417 (1 ) 416 (8 ) 408 Interest expense 73 (1 ) 72 — 72 Earnings before income taxes and noncontrolling interests 344 — 344 (8 ) 336 Income tax expense (benefit) 70 — 70 1 71 Net income 274 — 274 (9 ) 265 Less: Net income attributable to noncontrolling interests 67 67 — 67 Net income attributable to Tenneco Inc. $ 207 $ — $ 207 $ (9 ) $ 198 Earnings per share Weighted average shares of common stock outstanding — Basic earnings per share of common stock $ 3.93 $ — $ 3.93 $ (0.18 ) $ 3.75 Diluted earnings per share of common stock $ 3.91 $ — $ 3.91 $ (0.18 ) $ 3.73 Year Ended December 31, 2017 As Reported Reclasses As Reclassified Revisions As Revised Consolidated statement of comprehensive income (Millions) Net income $ 274 $ — $ 274 $ (9 ) $ 265 Other comprehensive income (loss)—net of tax Foreign currency translation adjustment 99 — 99 7 106 Defined benefit plans 27 — 27 (10 ) 17 126 — 126 (3 ) 123 Comprehensive income (loss) 400 — 400 (12 ) 388 Less: Comprehensive income (loss) attributable to noncontrolling interests 69 — 69 — 69 Comprehensive income (loss) attributable to common shareholders $ 331 $ — $ 331 $ (12 ) $ 319 Year Ended December 31, 2016 As Reported Reclasses As Reclassified Revisions As Revised (Millions, except per share amounts) Consolidated statement of income Revenues Net sales and operating revenues $ 8,599 $ — $ 8,599 $ (2 ) $ 8,597 Costs and expenses Cost of sales (exclusive of depreciation and amortization) 7,116 — 7,116 10 7,126 Selling, general, and administrative 513 — 513 1 514 Depreciation and amortization 212 — 212 1 213 Engineering, research, and development 154 — 154 (1 ) 153 7,995 — 7,995 11 8,006 Other expense (income) Loss on sale of receivables 5 — 5 — 5 Non-service pension and postretirement benefit costs — 84 84 — 84 Loss on extinguishment of debt — 24 24 — 24 Other expense (income), net 83 (84 ) (1 ) — (1 ) 88 24 112 — 112 Earnings before interest expense, income taxes, and noncontrolling interests 516 (24 ) 492 (13 ) 479 Interest expense 92 (24 ) 68 — 68 Earnings before income taxes and noncontrolling interests 424 — 424 (13 ) 411 Income tax expense (benefit) — — — (4 ) (4 ) Net income 424 — 424 (9 ) 415 Less: Net income attributable to noncontrolling interests 68 — 68 — 68 Net income attributable to Tenneco Inc. $ 356 $ — $ 356 $ (9 ) $ 347 Earnings per share Weighted average shares of common stock outstanding — Basic earnings per share of common stock $ 6.36 $ — $ 6.36 $ (0.16 ) $ 6.20 Diluted earnings per share of common stock $ 6.31 $ — $ 6.31 $ (0.16 ) $ 6.15 Year Ended December 31, 2016 As Reported Reclasses As Reclassified Revisions As Revised Consolidated statement of comprehensive income (Millions) Net income $ 424 $ — $ 424 $ (9 ) $ 415 Other comprehensive income (loss)—net of tax Foreign currency translation adjustment (45 ) — (45 ) (11 ) (56 ) Defined benefit plans 41 — 41 10 51 (4 ) — (4 ) (1 ) (5 ) Comprehensive income (loss) 420 — 420 (10 ) 410 Less: Comprehensive income (loss) attributable to noncontrolling interests 64 — 64 — 64 Comprehensive income (loss) attributable to common shareholders $ 356 $ — $ 356 $ (10 ) $ 346 December 31, 2017 As Reported Reclasses As Reclassified Revisions As Revised Consolidated balance sheet (Millions) Current assets: Cash and cash equivalents $ 315 $ — $ 315 $ — $ 315 Restricted cash 3 — 3 — 3 Receivables: Customer notes and accounts, net 1,294 — 1,294 — 1,294 Other 27 — 27 — 27 Inventories 869 — 869 (49 ) 820 Prepayments and other current assets 291 — 291 (3 ) 288 Total current assets 2,799 — 2,799 (52 ) 2,747 Property, plant and equipment, net 1,615 79 1,694 (3 ) 1,691 Long-term receivables, net 9 — 9 — 9 Goodwill 49 — 49 — 49 Intangibles, net 22 — 22 — 22 Investments in nonconsolidated affiliates — 2 2 — 2 Deferred income taxes 204 — 204 9 213 Other assets 144 (81 ) 63 — 63 Total assets $ 4,842 $ — $ 4,842 $ (46 ) $ 4,796 Short-term debt, including current maturities of long-term debt $ 83 $ 20 $ 103 $ — $ 103 Accounts payable 1,705 (123 ) 1,582 — 1,582 Accrued compensation and employee benefits 141 141 — 141 Accrued income taxes 45 (20 ) 25 2 27 Accrued interest 14 (14 ) — — — Accrued liabilities 287 (287 ) — — — Other 132 (132 ) — — Accrued expenses and other current liabilities 415 415 9 424 Total current liabilities 2,266 — 2,266 11 2,277 Long-term debt 1,358 — 1,358 — 1,358 Deferred income taxes 11 — 11 — 11 Pension and postretirement benefits 268 — 268 — 268 Deferred credits and other liabilities 155 — 155 3 158 Commitments and contingencies Total liabilities 4,058 — 4,058 14 4,072 Redeemable noncontrolling interests 42 42 — 42 Tenneco Inc. shareholders’ equity: Preferred stock—$0.01 par value; none issued — — — — — Class A voting common stock—$0.01 par value; shares issued: (2018—71,675,379; 2017—66,033,509) 1 — 1 — 1 Additional paid-in capital 3,112 — 3,112 — 3,112 Accumulated other comprehensive loss (541 ) — (541 ) 3 (538 ) Accumulated deficit (946 ) — (946 ) (63 ) (1,009 ) 1,626 — 1,626 (60 ) 1,566 Shares held as treasury stock—at cost: 2018 and 2017—14,592,888 shares (930 ) — (930 ) — (930 ) Total Tenneco Inc. shareholders’ equity 696 — 696 (60 ) 636 Noncontrolling interests 46 — 46 — 46 Total equity 742 — 742 (60 ) 682 Total liabilities, redeemable noncontrolling interests and equity $ 4,842 $ — $ 4,842 $ (46 ) $ 4,796 Year Ended December 31, 2017 As Reported Reclasses As Reclassified Revisions As Revised Consolidated statements of cash flow (Millions) Operating Activities Net income $ 274 $ — $ 274 $ (9 ) $ 265 Net cash provided by operating activities 517 — 517 — 517 Investing Activities Net cash used by investing activities (300 ) — (300 ) — (300 ) Financing Activities Proceeds from term loans and notes — 137 137 23 160 Repayments of term loans and notes — (19 ) (19 ) (17 ) (36 ) Retirement of long-term debt (19 ) 19 — — — Issuance of long-term debt 137 (137 ) — — — Borrowings on revolving lines of credit — — — 6,664 6,664 Payments on revolving lines of credit — — — (6,737 ) (6,737 ) Net increase (decrease) in revolver borrowings (67 ) — (67 ) 67 — Net cash provided (used) by financing activities $ (251 ) $ — $ (251 ) $ — $ (251 ) Year Ended December 31, 2016 As Reported Reclasses As Reclassified Revisions As Revised Consolidated statements of cash flow (Millions) Operating Activities Net income $ 424 $ — $ 424 $ (9 ) $ 415 Net cash provided by operating activities 374 — 374 — 374 Investing Activities Net cash used by investing activities (229 ) — (229 ) — (229 ) Financing Activities Proceeds from term loans and notes — 509 509 20 529 Repayments of term loans and notes — (531 ) (531 ) (14 ) (545 ) Retirement of long-term debt (531 ) 531 — — — Issuance of long-term debt 509 (509 ) — — — Borrowings on revolving lines of credit — — — 5,417 5,417 Payments on revolving lines of credit — — — (5,221 ) (5,221 ) Net increase (decrease) in revolver borrowings 202 — 202 (202 ) — Net cash provided (used) by financing activities $ (86 ) $ — $ (86 ) $ — $ (86 ) Year Ended December 31, 2017 As Reported Revisions As Revised Consolidated statements of shareholders' equity (Millions) Accumulated Deficit Balance January 1 $ (1,100 ) $ (54 ) $ (1,154 ) Net income attributable to Tenneco Inc. 207 (9 ) 198 Cash dividends declared (53 ) — (53 ) Balance December 31 $ (946 ) $ (63 ) $ (1,009 ) Accumulated Other Comprehensive Loss Balance January 1 $ (665 ) $ 6 $ (659 ) Other comprehensive loss —net of tax : Foreign currency translation adjustment 97 7 104 Defined benefit plans 27 (10 ) 17 Balance December 31 $ (541 ) $ 3 $ (538 ) Total Tenneco Inc. Shareholders' Equity Balance January 1 $ 573 $ (48 ) $ 525 Net income attributable to Tenneco Inc. 207 (9 ) 198 Other comprehensive loss—net of tax: Foreign currency translation adjustment 97 7 104 Defined benefit plans 27 (10 ) 17 Comprehensive income 331 (12 ) 319 Stock-based compensation expense 14 — 14 Cash dividends (53 ) — (53 ) Treasury stock (169 ) — (169 ) Balance December 31 $ 696 $ (60 ) $ 636 Total Equity Balance January 1 $ 620 $ (48 ) $ 572 Net income 238 (9 ) 229 Other comprehensive loss—net of tax: Foreign currency translation adjustment 96 7 103 Defined benefit plans 27 (10 ) 17 Comprehensive income 361 (12 ) 349 Stock-based compensation expense 14 — 14 Cash dividends (53 ) — (53 ) Treasury stock (169 ) — (169 ) Distributions declared to noncontrolling interests (31 ) — (31 ) Balance December 31 $ 742 $ (60 ) $ 682 Year Ended December 31, 2016 As Reported Revisions As Revised Consolidated statements of shareholders' equity (Millions) Accumulated Deficit Balance January 1 $ (1,456 ) $ (45 ) $ (1,501 ) Net income attributable to Tenneco Inc. 356 (9 ) 347 Balance December 31 $ (1,100 ) $ (54 ) $ (1,154 ) Accumulated Other Comprehensive Loss Balance January 1 $ (665 ) $ 7 $ (658 ) Other comprehensive loss—net of tax: Foreign currency translation adjustment (41 ) (11 ) (52 ) Defined benefit plans 41 10 51 Balance December 31 $ (665 ) $ 6 $ (659 ) Total Tenneco Inc. shareholders' equity Balance January 1 $ 425 $ (38 ) $ 387 Net income attributable to Tenneco Inc. 356 (9 ) 347 Other comprehensive loss—net of tax: Foreign currency translation adjustment (41 ) (11 ) (52 ) Defined benefit plans 41 10 51 Comprehensive income 356 (10 ) 346 Stock-based compensation expense 17 — 17 Treasury stock (225 ) — (225 ) Balance December 31 $ 573 $ (48 ) $ 525 Total Equity Balance January 1 $ 464 $ (38 ) $ 426 Net income 388 (9 ) 379 Other comprehensive loss—net of tax: Foreign currency translation adjustment (43 ) (11 ) (54 ) Defined benefit plans 41 10 51 Comprehensive income 386 (10 ) 376 Stock-based compensation expense 17 — 17 Treasury stock (225 ) — (225 ) Distribution declared to noncontrolling interests (22 ) — (22 ) Balance December 31 $ 620 $ (48 ) $ 572 Summary of Significant Accounting Policies Principles of Consolidation: The Company consolidates into its financial statements the accounts of the Company, all wholly owned subsidiaries, and any partially owned subsidiary it has the ability to control. Control generally equates to ownership percentage, whereby investments more that 50% owned are consolidated, investments in affiliates of 50% or less but greater than 20% are accounted for using the equity method, and investments in affiliates of 20% or less are accounted for using the cost method. See Note 8, Investment in Nonconsolidated Affiliates . The Company does not consolidate any entity for which it has a variable interest based solely on the power to direct the activities and significant participation in the entity's expected results that would not otherwise be consolidated based on control through voting interests. Further, its affiliates are businesses established and maintained in connection with its operating strategy and are not special purpose entities. All intercompany transactions and balances have been eliminated. Use of Estimates: The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported therein. Due to the inherent uncertainty involved in making estimates, actual results reported in future periods may be based upon amounts that differ from these estimates. Cash and Cash Equivalents: The Company considers all highly liquid investments with maturities of 90 days or less from the date of purchase to be cash equivalents. The carrying value of cash and cash equivalents approximate fair value. Restricted Cash: The Company is required to provide cash collateral in connection with certain contractual arrangements and statutory requirements. The Company has $5 million and $3 million of restricted cash at December 31, 2018 and 2017 in support of these arrangements and requirements. Notes and Accounts Receivable: Notes and accounts receivable are stated at net realizable value, which approximates fair value. Receivables are reduced by an allowance for amounts that may become uncollectible in the future. The allowance is an estimate based on historical collection experience, current economic and market conditions, and a review of the current status of each customer's trade accounts or notes receivable. A receivable is past due if payments have not been received within the agreed-upon invoice terms. Account balances are charged-off against the allowance when management determines the receivable will not be recovered. The allowance for doubtful accounts on short-term and long-term accounts receivable was $17 million and $16 million at December 31, 2018 and 2017 . The allowance for doubtful accounts on short-term and long-term notes receivable was zero at both December 31, 2018 and 2017 . Inventories: Inventories are stated at the lower of cost or net realizable value using the first-in, first-out (“FIFO”) or average cost methods. Work in process includes purchased parts such as substrates coated with precious metals. Cost of inventory includes direct materials, labor, and applicable manufacturing overhead costs. The value of inventories are reduced for excess and obsolescence based on management's review of on-hand inventories compared to historical and estimated future sales and usage. Inventory held at consignment locations is included in finished goods inventory as the Company retains full title and rights to the products. Redeemable Noncontrolling Interests: The Company has noncontrolling interests with redemption features. These redemption features could require the Company to make an offer to purchase the noncontrolling interests at fair value in the event of a change in control of Tenneco Inc. or certain of its subsidiaries. As a result of the Acquisition, the Company acquired $10 million in redeemable noncontrolling interests (exclusive of interests related to a subsidiary in India) and triggered the related redemption features which provide the holders the option to require the Company to redeem the noncontrolling interests. The noncontrolling interest partners have elected not to require the Company to redeem their shares. The redemption of these redeemable noncontrolling interests is not solely within the Company's control. Accordingly, these noncontrolling interests are presented in the temporary equity section of the Company's consolidated balance sheets. The Company does not believe it is probable the redemption features related to these noncontrolling interest securities will be triggered as a change in control event is generally not probable until it occurs. As a result the noncontrolling interests have not been remeasured to redemption value. In addition, the Company acquired $86 million in redeemable noncontrolling interests related to a subsidiary in India. The Company initiated the process to make a tender offer of the shares it does not own due to the change in control in accordance with local regulations triggered by the Acquisition. It is probable these shares will become redeemable during 2019 under the tender offer at a price that is representative of fair value and as a result the noncontrolling interest is presented in the temporary equity section of the Company’s consolidated balance sheets. At the Acquisition date, this redeemable noncontrolling interest was recorded at its estimated fair value based on the preliminary purchase price allocation. The carrying amount for this redeemable noncontrolling interest at December 31, 2018 is currently greater than the redemption value as evidenced by the tender offer price resulting in no adjustment to reflect the noncontrolling interest at redemption value. At December 31, 2018 , the Company had previously held redeemable noncontrolling interests of $35 million , for which the redemption is not solely within the Company's control and these noncontrolling interests are presented in the temporary equity section of the Company's consolidated balance sheets. The Company does not believe it is probable the redemption features related to these noncontrolling interest securities will be triggered as a change in control event is generally not probable until it occurs. As such, the noncontrolling interests have not been remeasured to redemption value. The following is a rollforward of the activity in the redeemable noncontrolling interests for the years ended December 31, 2018 , 2017 and 2016 : December 31 2018 2017 2016 (Millions) Balance January 1 $ 42 $ 40 $ 41 Federal-Mogul acquisition 96 — — Net income attributable to redeemable noncontrolling interests 29 36 36 Other comprehensive (loss) income (2 ) 3 (2 ) Contributions received 6 — — Dividends declared (33 ) (37 ) (35 ) Balance December 31 $ 138 $ 42 $ 40 Long-Lived Assets: Long-lived assets, such as property, plant and equipment and definite-lived intangible assets are recorded at cost or fair value established at acquisition. Definite-lived intangible assets include customer relationships and platforms, patented and unpatented technology, and licensing agreements. Long-lived asset groups are evaluated for impairment when impairment indicators exist. If the carrying value of a long-lived asset group is impaired, an impairment charge is recorded for the amount by which the carrying value of the long-lived asset group exceeds its fair value. Depreciation and amortization are computed principally on a straight-line basis over the estimated useful lives of the assets for financial reporting purposes. Expenditures for maintenance and repairs are expensed as incurred. Goodwill, net: Goodwill is determined as the excess of fair value over amounts attributable to specific tangible and intangible assets. Goodwill is evaluated for impairment annually, during the fourth quarter, or more frequently, if impairment indicators exist. An impairment indicator exists when a reporting unit's carrying value exceeds its fair value. When performing the goodwill impairment testing, a reporting units' fair value is based on valuation techniques using the best available information. The assessment of fair value utilizes a combination of the income approach and market approach. The impairment charge is the excess of the goodwill carrying value over the implied fair value of goodwill using a one-step quantitative approach. Trade names and trademarks: Trade names and trademarks are stated at fair value established at acquisition or cost. These indefinite-lived intangible assets will be evaluated for impairment annually during the fourth quarter, or more frequently, if impairment indicators exist. An impairment exists when a trade name and trademarks' carrying value exceeds its fair value. The fair values of these assets are based upon the prospective stream of hypothetical after-tax royalty cost savings discounted at rates that reflect the rates of return appropriate for these intangible assets. The impairment charge is the excess of the assets carrying value over its fair value. Pre-production Design and Development and Tooling Assets: The Company expenses pre-production design and development costs as incurred unless there is a contractual guarantee for reimbursement from the original equipment customer. Costs for molds, dies and other tools used to make products sold on long-term supply arrangements for which the Company has title to the assets are capitalized in property, plant and equipment and amortized to cost of sales over the shorter of the term of the arrangement or over the estimated useful lives of the assets. Costs for molds, dies and other tools used to make products sold on long-term supply arrangements for which the Company has a contractual guarantee for reimbursement or has the non-cancelable right to use the assets during the term of the supply arrangement from the customer are capitalized in prepayments and other current assets. Prepayments and other current assets included $193 million and $142 million at December 31, 2018 and 2017 , respectively, for in-process tools and dies being built for OE customers and unbilled pre-production design and development costs. Internal Use Software Assets: Certain costs related to the purchase and development of software used in the business operations are capitalized. Costs attributable to these software systems are amortized over their estimated useful lives based on various factors such as the effects of obsolescence, technology, and other economic factors. Additions to capitalized software development costs, including payroll and payroll-related costs for those employees directly associated with developing and obtaining the internal use software, are classified as investing activities in the consolidated statements of cash flows. Income Taxes: Deferred tax assets and liabilities are recognized on the basis of the future tax consequences attributable to temporary differences that exist between the financial statement carrying value of assets and liabilities and the respective tax values, and net operating losses ("NOL") and tax credit carryforwards on a taxing jurisdiction basis. Deferred tax assets and liabilities are measured using enacted tax rates that will apply in the years in which the temporary differences are expected to be recovered or paid. The effect on deferred tax assets and liabilities of a change in tax rates is recorded in the results of operations in the period that includes the enactment date under the law. Deferred income tax assets are evaluated quarterly to determine if valuation allowances are required or should be adjusted. Valuation allowances are established in certain jurisdictions based on a more likely than not standard. The ability to realize deferred tax assets depends on the Company's ability to generate sufficient taxable income within the carryback or carryforward periods provided for in the tax law for each tax jurisdiction. The Company considers the various possible sources of taxable income when assessing the realization of its deferred tax assets. The valuation allowances recorded against deferred tax assets generated by taxable losses in certain jurisdictions will effect the provision for income taxes until the valuation allowances are released. The Company's provision for income taxes will include no tax benefit for losses incurred and no tax expense with respect to income generated in these jurisdictions until the respective valuation allowance is eliminated. The Company records uncertain tax positions on the basis of a two-step process whereby it is determined whether it is more likely than not that the tax positions will be sustained based on the technical merits of the position, and for those tax positions that meet the more likely than not criteria, the largest amount of tax benefit that is greater than 50% likely to be realized upon ultimate settlement with the related tax authority is recognized. The Company elected to account for Global Intangible Low-Taxed Income (“GILTI”) as a current-period expense when incurred. Therefore, the Company has not recorded deferred taxes for basis differences expected to reverse in the future periods. Pension and other postretirement benefit plan obligations: Pensions and other postretirement employee benefit costs and related liabilities and assets are dependent upon assumptions used in calculating such amounts. These assumptions include discount rates, long term rate of return on plan assets, health care cost trends, compensation, and other factors. Actual results that differ from the assumptions used are accumulated and amortized over future periods, and accordingly, generally affect recognized expense in future periods. The cost of benefits provided by defined benefit pension and other postretirement plans is recorded in the period employees provide service. Future pension expense for certain significant funded benefit plans is calculated using an expected return on plan asset methodology. Investments with registered investment companies, common and preferred stocks, and certain government debt securities are valued at the closing price reported on the active market on which the securities are traded. Corporate debt securities are valued by third-party pricing sources using the multi-dimensional relational model using instruments with similar characteristics. Hedge funds and the collective trusts are valued at net asset value (NAV) per share which are provided by the respective investment sponsors or investment advisers. Revenue Recognition: The Company adopted Financial Accounting Standards Board ("FASB") Accounting Standards Update ("ASU") 2014-09 on January 1, 2018, which required it to recognize revenue when a customer obtains control rather than when substantially all risks and rewards of a good or service have been transferred. ASU 2014-09 was adopted by applying the modified retrospective method; see the Recently Adopted Accounting Standards section for additional information pertaining to the adoption of ASU 2014-09. The comparative information has not been adjusted and continues to be reported under the accounting standards in effect for those periods. The following accounting policies became effective upon the adoption of ASU 2014-09: The Company accounts for a contract with a customer when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance, and collectability of consideration is probable. Revenue is recognized for sales to OE and aftermarket customers when transfer of control of the related good or service has occurred. Revenue from most OE and aftermarket goods and services is transferred to customers at a point in time. Contract terms with certain OE customers results in products and services being transferred over time due to the customized nature of some of the Company's products together with contractual provisions in certain customer contracts that provide the Company with an enforceable right to payment for performance completed to date. The Company considers an input measure (e.g., costs incurred to date relative to total estimated costs at completion) as a fair measure of progress for the recognition of over time revenue associated with these customized parts. A cost measure best depicts the means of transfer of goods to the customer, which occurs as the Company incurs costs to fulfill contracts. The customer is invoiced once transfer of control has occurred and the Company has a right to payment. Typical payment terms vary based on the customer and the type of goods and services in the contract. The period of time between invoicing and when payment is due is not significant. Amounts billed and due from customers are classified as receivables on the consolidated balance sheets. Standard payment terms are less than one year and the Company has elected the practical expedient to not assess whether a contract has a significant financing component if the payment terms are less than one year. Performance Obligations: The majority of the Company's customer contracts with OE and aftermarket customers are long-term supply arrangements. The performance obligations are established by the enforceable contract, which is generally considered to be the purchase order but in some cases could be the delivery release schedule. The purchase order, or related delivery release schedule, is of a duration of less than one year. As such, the Company applies the practical expedient and does not disclose information about remaining performance obligations that have original expected durations of one year or less, for which work has not yet been performed. Rebates: The Company accrues for rebates pursuant to specific arrangements with certain customers, primarily in the aftermarket. Rebates generally provide for payments to customers based upon the achievement of specified purchase volumes and are recorded as a reduction of sales as earned by such customers. Product returns: Certain aftermarket contracts with customers include terms and conditions that result in a customer right of return that is accounted for on a gross basis. For these contracts the Company has recorded a refund liability and return asset within "Prepayments and other current assets." Shipping and handling costs: Shipping and handling costs associated with outbound freight after control of a product has transferred to a customer are accounted for as a fulfillment cost and are included in cost of sales in the consolidated statements of income. Sales and sales related taxes: The Company collects and remits taxes assessed by various governmental authorities that are both imposed on and concurrent with revenue-producing transactions with its customers. These taxes may include, but are not limited to, sales, use, value-added, and some excise taxes. The collection and remittance of these taxes is reported on a net basis. Contract Balances: Contract assets primarily relate to the Company’s rights to consideration for work c

Acquisitions and Divestitures

Acquisitions and Divestitures	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Acquisitions and Divestitures	Acquisitions and Divestitures Acquisition of Federal-Mogul On October 1, 2018, the Company closed on the acquisition of all of the interests in Federal-Mogul (the "Acquisition") pursuant to the Membership Interest Purchase Agreement, dated as of April 10, 2018 (the "Purchase Agreement"), by and among the Company, Federal-Mogul, American Entertainment Properties Corp. ("AEP" and, together with certain affiliated entities, the "Sellers") and Icahn Enterprises L.P. ("IEP"). Total consideration was approximately $3.7 billion . Following the completion of the Acquisition, Federal-Mogul was merged with and into the Company, with the Company continuing as the surviving company. Following the closing of the Acquisition, the Company has agreed to use its reasonable best efforts to pursue the separation of the combined company's powertrain technology business and its aftermarket and ride performance business into two new independent, publicly traded companies in a spin-off transaction that is expected to be treated as a tax-free reorganization for U.S. federal income tax purposes. At the effective date of the Acquisition, the Company's certificate of incorporation was amended and restated (the "Amended and Restated Certificate of Incorporation") in order to create a new class of non-voting convertible common stock of the Company called "Class B Non-Voting Common Stock" ("Class B Common Stock") with 25,000,000 shares authorized, and to reclassify the Company's existing common stock as "Class A Voting Common Stock" ("Class A Common Stock" and, together with the Class B Common Stock, the “common stock”). See Note 17, Shareholders' Equity for additional information on the conversion features of the Class B Common Stock. On the same date, the Company also entered into a new credit facility in connection with the Acquisition. The new credit facility includes $4.9 billion of total debt financing, consisting of a five -year $1.5 billion revolving credit facility, a five -year $1.7 billion term loan A facility and a seven -year $1.7 billion term loan B facility. See Note 11, Debt and Other Financing Arrangements , for additional information. Under the Amended and Restated Certificate of Incorporation, the authorized number of shares was increased from 185,000,000 shares, divided into 135,000,000 shares of common stock, par value $0.01 , and 50,000,000 shares of preferred stock, par value $0.01 , to 250,000,000 shares, divided into 175,000,000 shares of Class A Common Stock, 25,000,000 shares of Class B Common Stock and 50,000,000 shares of preferred stock, par value $0.01 . The Company (i) paid to AEP an aggregate amount in cash equal to $800 million (the “Cash Consideration”) and (ii) issued and delivered to AEP an aggregate of 29,444,846 shares of common stock at $41.99 per share (the “Stock Consideration”). The $1.2 billion of common stock was comprised of: (a) 5,651,177 shares of Class A Common Stock, par value $0.01 equal to 9.9 percent of the aggregate number of shares of Class A Common Stock issued and outstanding immediately following the closing of the Acquisition, and (b) 23,793,669 shares of newly created Class B Common Stock, par value $0.01 . The remaining consideration of approximately $1.7 billion was comprised primarily of the repayments of certain Federal-Mogul debt obligations. Advisory costs associated with the Acquisition were $68 million for the year ended December 31, 2018 and were recognized as a component of selling, general, and administrative expenses in the consolidated statements of income. The following table summarizes the purchase price (in millions, except for share data): Tenneco shares issued for purchase of Federal-Mogul 29,444,846 Tenneco share price at October 1, 2018 $ 41.99 Fair value of the Stock Consideration 1,236 Cash Consideration (1) 811 Repayment of Federal-Mogul debt and accrued interest (2) 1,660 Total consideration $ 3,707 (1) Cash consideration also included $11 million in advisory fees paid to a third-party. (2) Portion of the proceeds from the issuance of the $4.9 billion new credit facility that was used to repay Federal-Mogul’s term loan and revolver loan of $1,455 million and $200 million , respectively, and the related accrued interest of $5 million . The following table summarizes the preliminary fair values of assets acquired and liabilities assumed as of the acquisition date: (Millions) Cash, cash equivalents and restricted cash $ 277 Customer notes and accounts receivable 1,258 Other receivables 62 Inventories 1,551 Prepayments and other current assets 198 Property, plant and equipment 1,711 Long-term receivables 48 Goodwill 825 Intangibles 1,530 Investments in nonconsolidated affiliates 528 Deferred income taxes 166 Other assets 55 Total assets acquired 8,209 Short-term debt, including current maturities of long-term debt 130 Accounts payable 957 Accrued compensation and employee benefits 231 Accrued income taxes 49 Accrued expenses and other current liabilities 522 Long-term debt 1,315 Deferred income taxes 56 Pension and postretirement benefits 879 Deferred credits and other liabilities 124 Total liabilities assumed 4,263 Redeemable noncontrolling interests 96 Noncontrolling interests 143 Net assets and noncontrolling interests acquired $ 3,707 The preliminary allocation of the purchase price to the assets acquired and liabilities assumed, including the residual amount recognized as goodwill, is based upon estimated information and is subject to change within the measurement period. The measurement period is a period not to exceed one year from the acquisition date during which the Company may adjust estimated or provisional amounts recorded during purchase accounting if new information is obtained about facts and circumstances that existed as of the acquisition date that, if known, would have resulted in revised estimated values of those assets or liabilities as of that date. Measurement period adjustments are recorded in the period identified. Any adjustments to amounts recorded in purchase accounting that do not qualify as measurement period adjustments are included in earnings in the period identified. The fair values of the assets acquired and liabilities assumed are based on preliminary estimates and assumptions, as well as other information compiled by management, including valuations that utilize customary valuation procedures and techniques. While the Company believes these preliminary estimates provide a reasonable basis for estimating the fair value of the assets acquired and liabilities assumed, it will continue to evaluate available information prior to finalization of the amounts. The primary areas of the preliminary purchase price allocation that are not yet finalized relate to the fair value of property, plant and equipment; intangible assets; unconsolidated affiliates; deferred income tax assets and liabilities; redeemable noncontrolling interests; and noncontrolling interests. Goodwill and other assets and liabilities are reflected in the Powertrain and Motorparts segments and are located in all geographic areas. The goodwill resulting from this Acquisition consists largely of the Company's expected future economic benefits to arise from expected future product sales and synergies from combining Federal-Mogul with the Company's existing portfolio of products. Goodwill of $388 million was allocated to the Powertrain segment and $437 million was allocated to the Motorparts segment. None of the goodwill is deductible for tax purposes. Other intangible assets acquired include the following: Estimated Fair Value Weighted-Average Useful Lives (Millions) Definite-lived intangible assets: Customer platforms and relationships $ 964 10 years Technology rights 69 10 years Packaged kits know-how 36 10 years Licensing agreements 66 4.5 years Land use rights 30 42.8 years Total definite-lived intangible assets 1,165 10.5 years Indefinite-lived intangible assets: Trade names and trademarks 365 Total $ 1,530 The Company also recorded a $152 million step-up of inventory to its fair value as of the acquisition date based on the preliminary valuation and recognized $105 million as a non-cash charge to cost of goods sold during the fourth quarter of 2018 related to the amortization of this step-up, as the acquired inventory was sold. The Company expects to recognize the remaining amortization of the inventory step-up during 2019. The Company's consolidated statements of income for the year ended December 31, 2018 included net sales and operating revenues of $1,886 million and net loss of $69 million associated with the operating results of Federal-Mogul from October 1, 2018 to December 31, 2018. Pro Forma Results (Unaudited) The following table summarizes, on a pro forma basis, the combined results of operations of the Company and Federal-Mogul business as though the Acquisition and the related financing had occurred as of January 1, 2017. The pro forma results are not necessarily indicative of either the actual consolidated results had the acquisition of Federal-Mogul occurred on December 31, 2016 or of future consolidated operating results. For the Year Ended December 31 2018 2017 (In millions, except per share amounts) Net sales and operating revenues $ 17,860 $ 17,153 Earnings before income taxes and noncontrolling interests $ 488 $ 235 Net income attributable to Tenneco Inc. $ 275 $ 372 Basic earnings per share of common stock $ 3.41 $ 4.52 Diluted earnings per share of common stock $ 3.40 $ 4.51 These pro forma amounts have been calculated after applying the Company's accounting policies and the results presented above primarily reflect: (i) depreciation adjustments relating to fair value adjustments to property, plant, and equipment; (ii) amortization adjustments relating to fair value estimates of intangible assets; (iii) incremental interest expense, net on assumed indebtedness, the new credit facility, debt issuance costs, and fair value adjustments to debt; and (iv) cost of goods sold adjustments relating to fair value adjustments to inventory. Pro forma adjustments described above have been tax affected using the Company's effective rate during the respective periods. In 2018, the Company incurred $96 million of acquisition related costs. These expenses are included in Selling, general, and administrative on the Company's consolidated statements of income for the year ended December 31, 2018. These expenses, as well as $4 million of expenses incurred by Federal-Mogul in 2018 prior to the acquisition, are reflected in the pro forma earnings for the year ended December 31, 2017, in the table above. Other Matters Related to the Acquisition On March 3, 2017, and May 1, 2017, certain purported former stockholders of Federal-Mogul Holdings Corporation (“FMHC”) filed a petition in the Delaware Court of Chancery seeking an appraisal of the value of common stock they claim to have held at the time of the January 23, 2017 merger of IEH FM Holdings, LLC into FMHC. IEH FM Holdings, LLC was a wholly owned subsidiary of American Entertainment Properties Corp. and a subsidiary of Icahn Enterprises L.P. The two cases were consolidated on May 10, 2017 into: “In re Appraisal of Federal-Mogul Holdings LLC, C.A. No. 2017-0158-AGB.” Federal-Mogul received a capital contribution of $56 million on June 29, 2018 from its then-parent, IEP, in connection with this matter. At October 1, 2018, Federal-Mogul’s litigation reserve was $55 million , along with accrued interest of $6 million , which was assumed as part of the Acquisition. On October 19, 2018, the Company reached an agreement with the plaintiffs to settle their claims for $12.01 per share, inclusive of interest payable, or an aggregate of approximately $61 million . The Company paid this settlement in the fourth quarter of 2018. Assets Held for Sale The Company classifies assets and liabilities as held for sale (“disposal group”) when management, having the authority to approve the action, commits to a plan to sell the disposal group, the sale is probable within one year, and the disposal group is available for immediate sale in its present condition. The Company also considers whether an active program to locate a buyer has been initiated, whether the disposal group is marketed actively for sale at a price that is reasonable in relation to its current fair value, and whether actions required to complete the plan indicate it is unlikely significant changes to the plan will be made or the plan will be withdrawn. In December 2018, the Company entered into a stock and asset purchase agreement to sell certain assets and liabilities related to its wipers business in the Motorparts segment for a sale price of $29 million , subject to adjustment based on terms of the sale agreement. As of December 31, 2018 , proceeds from the sale would have been $22 million . The related assets and liabilities were classified as held for sale as of December 31, 2018 . The transaction closed on March 1, 2019. There were no disposal groups classified as held for sale as of December 31, 2017 . The assets and liabilities classified as held for sale as of December 31, 2018 were as follows: December 31 2018 (Millions) Assets Inventories $ 33 Other current assets 5 Long-lived assets 23 Total assets held for sale $ 61 Liabilities Accounts payable $ 21 Accrued liabilities 7 Other liabilities 11 Total liabilities held for sale $ 39 The assets and liabilities held for sale are recorded in “ Prepayments and other current assets ” and “ Accrued expenses and other current liabilities ” in the consolidated balance sheets as of December 31, 2018 .

Restructuring Charges and Asset

Restructuring Charges and Asset Impairments, Net Restructuring Charges and Asset Impairments, Net	12 Months Ended
	Dec. 31, 2018
Restructuring and Related Activities [Abstract]
Restructuring Charges and Asset Impairments, Net	Restructuring Charges and Asset Impairments, Net For the years ended December 31, 2018 , 2017 , and 2016 , restructuring charges, net, by segment, is as follows: Year Ended December 31 2018 2017 2016 (Millions) Clean Air $ 14 $ 23 $ 6 Ride Performance 48 16 13 Aftermarket 16 7 9 Powertrain (2 ) — — Motorparts 31 — — Other 5 1 2 $ 112 $ 47 $ 30 These amounts are classified in the consolidated statements of income as follows: Cost of sales $ 66 $ 41 $ 17 Engineering, research, and development 4 — 1 Selling, general, and administrative 40 6 12 Other expense 2 — — $ 112 $ 47 $ 30 For the years ended December 31, 2018 , 2017 , and 2016 , asset impairments, by segment, is as follows: Year Ended December 31 2018 2017 2016 (Millions) Clean Air $ — $ 2 $ 1 Ride Performance 6 1 2 Aftermarket — — 3 Other 2 — — $ 8 $ 3 $ 6 These amounts are classified in the consolidated statements of income as follows: Cost of sales $ 3 $ — $ — Selling, general, and administrative 2 — — Depreciation and amortization 3 3 4 Other expense — — 2 $ 8 $ 3 $ 6 In 2018, the Company incurred charges for the following items: • The Company incurred $25 million in restructuring and related costs, related to the accelerated move of the Beijing Ride Performance plant. The Company anticipates the move out of its Beijing plant will be completed by the first quarter of 2019. • The Company incurred $ 10 million in restructuring charges related to headcount reductions at a Clean Air manufacturing plant in Germany. • In October, 2018, the Company announced a plan to close its ride performance plants in Owen Sound, Ontario and Hartwell, Georgia as part of an initiative to realign its manufacturing footprint to enhance operational efficiency and respond to changing market conditions and capacity requirements. The Company expects to complete the closure of the two facilities near the end of the second quarter of 2020. The Company recorded charges of $24 million in 2018, including asset write-downs of $6 million . The charges included severance payments to employees, the cost of decommissioning equipment, and other costs associated with this action. • The Company incurred a $45 million charge related to a restructuring plan designed to achieve a portion of the synergies the Company anticipates achieving in connection with the acquisition of Federal-Mogul. Pursuant to the plan, the Company will reduce its headcount globally across all segments. The Company began implementing headcount reductions in January 2019 and these actions will continue through 2019. The Company's acquisition of Federal-Mogul is discussed further in Note 3, Acquisitions and Divestitures. • The Company incurred an additional $16 million in restructuring and related costs, including asset write-downs of $ 2 million, for cost improvement initiatives at various other operations around the world. In 2017, the Company incurred charges for the following items: • On June 29, 2017, the Company announced a restructuring initiative to close its Clean Air manufacturing plant in O'Sullivan Beach, Australia and downsize its Ride Performance plant in Clovelly Park, Australia when General Motors and Toyota ended vehicle production in the country in October 2017. All such restructuring activities related to this initiative were completed in 2018. The Company recorded total charges related to this initiative of $21 million in 2017 including asset write-downs of $2 million . The charges included severance payments to employees, the cost of decommissioning equipment, a lease termination payment and other costs associated with this action. • In the fourth quarter of 2017, the Company began to accelerate a required move of its Beijing Ride Performance plant outside of Beijing area. The Company incurred $6 million of restructuring and related costs due to this relocation. • The Company recognized a $10 million charge, including asset write-downs of $1 million , related to the planned closing of its Clean Air plant in Ghent, Belgium due to the scheduled end of production on a customer platform in 2020. • The Company incurred an additional $13 million in restructuring and related costs for cost improvement initiatives at various other operations around the world. In 2016, the Company incurred $36 million in restructuring and related costs including asset write-downs of $ 6 million , primarily related to manufacturing footprint improvements in North America, headcount reduction and cost improvement initiatives in Europe, China, South America and Australia. Restructuring Reserve Rollforward Amounts related to activities that were charged to restructuring reserves, including costs incurred to support future structural cost reductions, by reportable segments are as follows: Reportable Segments Clean Air Ride Performance Aftermarket Powertrain Motorparts Total Reportable Segments Other Total (Millions) Balance at December 31, 2015 $ 2 $ 24 $ 4 $ — $ — $ 30 $ — $ 30 Provisions 6 13 9 — — 28 2 30 Payments (6 ) (31 ) (7 ) — — (44 ) (1 ) (45 ) Balance at December 31, 2016 2 6 6 — — 14 1 15 Provisions 23 16 7 — — 46 1 47 Payments (12 ) (16 ) (9 ) — — (37 ) (2 ) (39 ) Foreign currency 1 1 — — — 2 — 2 Balance at December 31, 2017 14 7 4 — — 25 — 25 Federal-Mogul Acquisition — — — 22 15 37 — 37 Provisions 14 48 16 1 31 110 5 115 Held for sale — — — — (2 ) (2 ) — (2 ) Revisions to estimates — — — (3 ) — (3 ) — (3 ) Payments (10 ) (35 ) (12 ) (5 ) (4 ) (66 ) (2 ) (68 ) Foreign currency (1 ) — — — — (1 ) — (1 ) Balance at December 31, 2018 $ 17 $ 20 $ 8 $ 15 $ 40 $ 100 $ 3 $ 103 The following table provides a summary of the Company's consolidated restructuring liabilities and related activity for each type of exit costs: Employee Costs Facility Closure and Other Costs Total (Millions) Balance at December 31, 2015 $ 20 $ 10 $ 30 Provisions 19 11 30 Revisions to estimates (15 ) 15 — Payments (16 ) (29 ) (45 ) Balance at December 31, 2016 8 7 15 Provisions 31 16 47 Payments (22 ) (17 ) (39 ) Foreign currency 2 — 2 Balance at December 31, 2017 19 6 25 Federal-Mogul Acquisition 37 — 37 Provisions 90 25 115 Held for sale (2 ) — (2 ) Revisions to estimates (4 ) 1 (3 ) Payments (41 ) (27 ) (68 ) Foreign currency (1 ) — (1 ) Balance at December 31, 2018 $ 98 $ 5 $ 103

Inventories

Inventories	12 Months Ended
	Dec. 31, 2018
Inventory Disclosure [Abstract]
Inventories	Inventories At December 31, 2018 and 2017 , inventory by major classification was as follows: December 31 2018 2017 (Millions) Finished goods $ 1,116 $ 300 Work in process 562 268 Raw materials 457 178 Materials and supplies 110 74 Total inventories $ 2,245 $ 820

Property, Plant and Equipment_N

Property, Plant and Equipment—Net	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment—Net	Property, Plant and Equipment, Net The components of property, plant and equipment — net were as follows: December 31 Useful Life 2018 2017 (Millions) Land $ 293 $ 20 — Buildings and improvements 1,023 615 10 to 50 years Machinery, equipment and tooling 4,041 2,992 3 to 25 years Capitalized software 378 346 3 to 12 years Other, including construction in progress 568 396 — Property, plant and equipment , cost 6,303 4,369 Less: Accumulated depreciation and amortization (2,802 ) (2,678 ) Property, plant and equipment , net $ 3,501 $ 1,691 Depreciation and amortization related to property, plant and equipment was $313 million , $223 million and $210 million for the years ended December 31, 2018 , 2017 and 2016 , respectively.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets—Net	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets—Net	Goodwill and Other Intangible Assets At December 31, 2018 and 2017 , goodwill consists of the following: December 31, 2018 Clean Air Segment Ride Performance Segment Aftermarket Segment Powertrain Motorparts Total (Millions) Gross carrying amount, January 1 $ 23 $ 156 $ 229 $ — $ — $ 408 Acquisition of Federal-Mogul (1) — — — 388 437 825 Currency translation (1 ) (1 ) — — — (2 ) Gross carrying amount, December 31 22 155 229 388 437 1,231 Accumulated impairment loss, January 1 $ — $ (140 ) $ (219 ) $ — $ — $ (359 ) Impairment — (3 ) — — — (3 ) Currency translation — — — — — — Accumulated impairment loss, December 31 — (143 ) (219 ) — — (362 ) Net carrying value, December 31 $ 22 $ 12 $ 10 $ 388 $ 437 $ 869 December 31, 2017 Clean Air Segment Ride Performance Segment Aftermarket Segment Powertrain Motorparts Total (Millions) Gross carrying amount, January 1 $ 21 $ 155 $ 229 $ — $ — $ 405 Currency translation 2 1 — — — 3 Gross carrying amount, December 31 23 156 229 — — 408 Accumulated impairment loss, January 1 $ — $ (133 ) $ (215 ) $ — $ — $ (348 ) Impairment — (7 ) (4 ) — — (11 ) Currency translation — — — — — — Accumulated impairment loss, December 31 — (140 ) (219 ) — — (359 ) Net carrying value, December 31 $ 23 $ 16 $ 10 $ — $ — $ 49 (1) The acquisition on October 1, 2018 of Federal-Mogul resulted in goodwill of $825 million . See Note 3, Acquisitions and Divestitures for additional information. As a result of the goodwill impairment evaluation in the fourth quarter of 2018, the estimated fair value of the Ride Performance North America reporting unit was lower than its carrying value. Accordingly, a full goodwill impairment charge of $3 million for Ride Performance was recorded for the year ended December 31, 2018 . As a result of the goodwill impairment evaluation in the fourth quarter of 2017, the estimated fair value of the Europe and South America Ride Performance and Aftermarket reporting units were lower than their carrying value. Accordingly, a full goodwill impairment charge of $7 million for Ride Performance and $4 million for Aftermarket was recorded for the year ended December 31, 2017 . At December 31, 2018 and 2017 , the Company's intangible assets consist of the following: December 31, 2018 December 31, 2017 Useful Lives Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying (Millions) Definite-lived intangible assets: Customer relationships and platforms 10 years $ 964 $ (24 ) $ 940 $ — $ — $ — Customer contract 10 years 8 (5 ) 3 8 (5 ) 3 Patents 10 to 17 years 1 (1 ) — 1 (1 ) — Technology rights 10 to 30 years 98 (27 ) 71 29 (23 ) 6 Packaged kits know-how 10 years 36 (1 ) 35 — — — Licensing agreements 3 to 5 years 66 (3 ) 63 — — — Land use rights 28 to 46 years 44 (2 ) 42 15 (2 ) 13 1,217 (63 ) 1,154 53 (31 ) 22 Indefinite-lived intangible assets: Trade names and trademarks 365 — 365 — — — Total $ 1,582 $ (63 ) $ 1,519 $ 53 $ (31 ) $ 22 Included in the table above are definite-lived and indefinite-lived intangible assets of $1,165 million and $365 million , respectively, identified in connection with the October 1, 2018 acquisition of Federal-Mogul. See Note 3, Acquisitions and Divestitures for additional information. Amortization of intangibles amounted to $32 million in 2018 and $3 million in both 2017 and 2016 , and are included in the consolidated statements of income caption “Depreciation and amortization.” The expected future amortization expense for the Company's definite-lived intangible assets is as follows: 2019 2020 2021 2022 2023 2024 and thereafter Total (Millions) Expected Amortization Expense $ 124 $ 125 $ 124 $ 119 $ 116 $ 546 $ 1,154

Investment in Nonconsolidated A

Investment in Nonconsolidated Affiliates	12 Months Ended
	Dec. 31, 2018
Equity Method Investments and Joint Ventures [Abstract]
Investment in Nonconsolidated Affiliates	Investment in Nonconsolidated Affiliates The Company maintains investments in several nonconsolidated affiliates, which are primarily located in China, Korea, Turkey, and the U.S. The Company generally equates control to ownership percentage whereby investments more than 50% owned are consolidated. As of December 31, 2018 and 2017 , the Company’s investment in affiliates was $544 million and $2 million , respectively. The Company’s ownership interests in affiliates, not including the acquisition of Federal-Mogul, accounted for under the equity method is as follows: Year Ended December 31 2018 2017 2016 Futaba Tenneco U.K. Ltd. (UK) — % — % 49.0 % Montagewerk Abgastechnik Emden GmbH (Germany) 50.0 % 50.0 % 50.0 % The Company sold its share of Futaba Tenneco U.K. Limited on April 28, 2017. Additionally, the Company acquired the following ownership interests accounted for under the equity method as a result of the acquisition of Federal-Mogul: Year Ended December 31 2018 Anqing TP Goetze Piston Ring Company Limited (China) 35.7 % Anqing TP Powder Metallurgy Co., Ltd (China) 20.0 % Dongsuh Federal-Mogul Industrial Co. Ltd. (Korea) 50.0 % Farloc Argentina SAIC Y F (Argentina) 23.9 % Federal-Mogul Powertrain Otomotiv A.S. (Turkey) 50.0 % Federal-Mogul TP Liner Europe Otomotiv Ltd. Sti. (Turkey) 25.0 % Federal-Mogul TP Liners, Inc. (USA) 46.0 % Frenos Hidraulicos Automotrices, S.A. de C.V. (Mexico) 49.0 % JURID do Brasil Sistemas Automotivos Ltda. (Brazil) 19.9 % KB Autosys Co., Ltd. (Korea) 33.6 % The following table represents amounts reflected in the Company’s consolidated financial statements related to nonconsolidated affiliates: Year Ended December 31 2018 2017 2016 (Millions) Equity earnings (losses) of nonconsolidated affiliates, net of tax $ 18 $ (1 ) $ — Cash dividends received from nonconsolidated affiliates $ 2 $ — $ — At December 31, 2018 , the carrying amount of the Company's investments in nonconsolidated affiliates accounted for under the equity method exceeded its share of the underlying net assets by $207 million . This is based on the preliminary estimate of the fair value performed as part of the Acquisition and is subject to allocation between identifiable tangible, intangible assets, and goodwill. This amount is subject to change as part of finalizing purchase accounting related to the Acquisition. The following tables present summarized aggregated financial information of the Company’s nonconsolidated affiliates as of and for the period ended December 31, 2018 : Statements of Income Otomotiv A.S. Anqing TP Goetze Other Total (Millions) Sales $ 92 $ 41 $ 137 $ 270 Gross profit $ 23 $ 13 $ 33 $ 69 Income from continuing operations $ 26 $ 13 $ 10 $ 49 Net income $ 22 $ 12 $ 8 $ 42 Balance Sheets Otomotiv A.S. Anqing TP Goetze Other Total (Millions) Current assets $ 129 $ 164 $ 249 $ 542 Noncurrent assets $ 300 $ 132 $ 200 $ 632 Current liabilities $ 70 $ 40 $ 131 $ 241 Noncurrent liabilities $ 82 $ — $ 11 $ 93 See Note 21, Related Party Transactions for additional information on balances and transactions with equity method investments.

Derivatives and Hedging Activit

Derivatives and Hedging Activities	12 Months Ended
	Dec. 31, 2018
Disclosure Financial Instruments Additional Information [Abstract]
Derivatives and Hedging Activities	Derivatives and Hedging Activities The Company is exposed to market risk, such as fluctuations in foreign currency exchange rates, commodity prices, equity compensation liabilities, and changes in interest rates, which may result in cash flow risks. For exposures not offset within its operations, the Company enters into various derivative transactions pursuant to its risk management policies, which prohibit holding or issuing derivative financial instruments for speculative purposes. Designation of derivative instruments is performed on a transaction basis to support hedge accounting. The changes in fair value of these hedging instruments are offset in part or in whole by corresponding changes in the fair value or cash flows of the underlying exposures being hedged. The Company assesses the initial and ongoing effectiveness of its hedging relationships in accordance with its documented policy. Foreign Currency Risk The Company manufactures and sells its products in North America, South America, Asia, Europe, and Africa. As a result, the Company’s financial results could be significantly affected by factors such as changes in foreign currency exchange rates or weak economic conditions in foreign markets in which the Company manufactures and sells its products. The Company generally tries to use natural hedges within its foreign currency activities, including the matching of revenues and costs, to minimize foreign currency risk. Where natural hedges are not in place, the Company considers managing certain aspects of its foreign currency activities and larger transactions through the use of foreign currency options or forward contracts. Principal currencies hedged have historically included the U.S. dollar, euro, British pound, Polish zloty, and Mexican peso. Concentrations of Credit Risk Financial instruments including cash equivalents and derivative contracts expose the Company to counterparty credit risk for non-performance. The Company’s counterparties for cash equivalents and derivative contracts are banks and financial institutions that meet the Company’s requirement of high credit standing. The Company’s counterparties for derivative contracts are substantial investment and commercial banks with significant experience using such derivatives. The Company manages its credit risk through policies requiring minimum credit standing and limiting credit exposure to any one counterparty and through monitoring counterparty credit risks. The Company’s concentration of credit risk related to derivative contracts at December 31, 2018 and 2017 is not material. Other The Company presents its derivative positions and any related material collateral under master netting agreements on a net basis. For derivatives designated as cash flow hedges, changes in the time value are excluded from the assessment of hedge effectiveness. Unrealized gains and losses associated with ineffective hedges, determined using the hypothetical derivative method, are recognized in “Other (income) expense, net.” Derivative gains and losses included in accumulated other comprehensive loss for effective hedges are reclassified into operations upon recognition of the hedged transaction. Derivative gains and losses associated with undesignated hedges are recognized in “Other (income) expense, net” for outstanding hedges and “Cost of sales” or “Other (income) expense, net” upon hedge maturity. Derivative Instruments Foreign currency forward contracts — The Company enters into foreign currency forward purchase and sale contracts to mitigate its exposure to changes in exchange rates on certain intercompany and third-party trade receivables and payables. In managing its foreign currency exposures, the Company identifies and aggregates existing offsetting positions and then hedges residual exposures through third-party derivative contracts. The gain or loss on these contracts is recorded as foreign currency gains (losses) within cost of sales in the consolidated statements of income. The fair value of foreign currency forward contracts are recorded in "Prepayments and other current assets" or "Accrued expenses and other current liabilities" in the consolidated balance sheets. The fair value of the Company's foreign currency forward contracts was a net asset position of less than $1 million at December 31, 2018 and a net liability position of less than $1 million at December 31, 2017 . The following table summarizes by major currency the notional amounts for foreign currency forward purchase and sale contracts as of December 31, 2018 (all of which mature in 2019 ): Notional Amount (Millions) Canadian dollars —Sell (2 ) European euro —Purchase 1 —Sell (8 ) Polish zloty —Purchase 35 Mexican pesos —Purchase 211 U.S. dollars —Purchase 2 —Sell (11 ) Cash-settled Share Swap Transactions — In the second quarter of 2017, the Company entered into an equity swap agreement. The Company selectively uses cash-settled share swaps to reduce market risk associated with its deferred compensation liabilities. These equity deferred compensation liabilities increase as the Company's stock price increases and decrease as the Company's stock price decreases. In contrast, the value of the swap agreement moves in the opposite direction of these liabilities, allowing the Company to fix a portion of the liabilities at a stated amount. As of December 31, 2018 , the Company had hedged its deferred compensation liability related to approximately 250,000 common share equivalents. The fair value of the equity swap agreement is recorded in "Prepayments and other current assets" in the consolidated balance sheets. The fair value of the Company's equity swap agreement was a net asset position of $4 million at December 31, 2018 and $4 million at December 31, 2017. Hedging Instruments Cash Flow Hedges—Commodity Price Risk — The Company’s production processes are dependent upon the supply of certain raw materials that are exposed to price fluctuations on the open market. The primary purpose of the Company’s commodity price forward contract activity is to manage the volatility associated with forecasted purchases for up to eighteen months in the future. The Company monitors its commodity price risk exposures regularly to maximize the overall effectiveness of its commodity forward contracts. Principal raw materials hedged include copper, nickel, tin, zinc, and aluminum. In certain instances within this program, foreign currency forwards may be used in order to match critical terms for commodity exposure. The Company has designated these contracts as cash flow hedging instruments. The Company records unrecognized gains and losses in other comprehensive income (loss) (“OCI or OCL”) and makes regular reclassifying adjustments into “Cost of sales” within the consolidated statements of income when the underlying hedged transaction is recognized in earnings. The Company had commodity derivatives outstanding with an equivalent notional amount of $27 million as of December 31, 2018 and none as of December 31, 2017. Substantially all of the commodity price hedge contracts mature within one year. Net Investment Hedge – Foreign Currency Borrowings — The Company has foreign currency denominated debt, €752 million of which was designated as a net investment hedge in certain foreign subsidiaries and affiliates of the Company. Changes to its carrying value are included in shareholders' equity in the foreign currency translation component of OCL and offset against the translation adjustment on the underlying net assets of those foreign subsidiaries and affiliates, which are also recorded in OCL. The Company’s debt instruments are discussed further in Note 11 — Debt and Other Financing Arrangements . The following table is a summary of the carrying value of derivative and non-derivative instruments designated as hedges as of December 31, 2018 : Carrying Value December 31 Balance sheets classification 2018 (Millions) Commodity price hedge contracts designated as cash flow hedges Accrued expenses and other current liabilities $(2) Foreign currency borrowings designated as net investment hedges Long-term debt $863 The following table represents the effects before reclassification into net income of derivative and non-derivative instruments designated as hedges in accumulated other comprehensive loss as of December 31, 2018: Amount of gain (loss) recognized in accumulated OCI or OCL (effective portion) December 31 2018 (Millions) Foreign currency borrowings designated as net investment hedges $(3) The Company estimates less than $1 million of net derivative losses included in AOCI as of December 31, 2018 will be reclassified into earnings within the following 12 months. See Note 18 — Changes in Accumulated Other Comprehensive Income (Loss) by Component for amounts recognized in OCL and amounts reclassified out of OCL for the year ended December 31, 2018 for these hedging instruments.

Debt and Other Financing Arrang

Debt and Other Financing Arrangements	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Debt and Other Financing Arrangements	Debt and Other Financing Arrangements Long-Term Debt A summary of the Company's long-term debt obligations at December 31, 2018 and 2017 , is set forth in the following table: 2018 2017 Principal Carrying Amount (1) Effective Interest Rate Principal Carrying Amount (1) Effective Interest Rate (Millions) Credit Facilities Revolver Borrowings Due 2023 $ — $ — — $ 244 $ 244 Term Loans LIBOR plus 1.75% Term Loan A due 2019 through 2023 (2) 1,700 1,691 6.160 % — — — LIBOR plus 2.75% Term Loan B due 2019 through 2025 (3) 1,700 1,629 8.880 % — — — Senior Tranche A Term Loan — — — 390 388 2.900 % Senior Unsecured Notes $225 million of 5.375% Senior Notes due 2024 (4) 225 222 5.609 % 225 222 5.609 % $500 million of 5.000% Senior Notes due 2026 (5) 500 493 5.219 % 500 492 5.219 % Senior Secured Notes (9) €415 million 4.875% Euro Fixed Rate Notes due 2022 (6) 476 496 3.599 % — — — €300 million of Euribor plus 4.875% Euro Floating Rate Notes due 2024 (7) 344 349 4.620 % — — — €350 million of 5.000% Euro Fixed Rate Notes due 2024 (8) 401 427 3.823 % — — — Other Debt, primarily foreign instruments 108 106 17 15 5,413 1,361 Less — maturities classified as current 73 3 Total long-term debt $ 5,340 $ 1,358 (1) Carrying amount is net of unamortized debt issuance costs and debt discounts or premiums. Total unamortized debt issuance costs were $90 million and $13 million as of December 31, 2018 and 2017 . Total unamortized debt (premium) discount, net was $(49) million and $2 million as of December 31, 2018 and 2017 . (2) Principal and interest payable in 19 consecutive quarterly installments beginning March 31, 2019, with $21 million being paid quarterly in the seven quarters, followed by $32 million paid in the subsequent four quarters followed by $43 million in the subsequent eight quarters and the remainder at maturity. (3) Principal and interest payable in 27 consecutive quarterly installments beginning March 31, 2019 with $4 million paid quarterly and the remainder at maturity. (4) Interest payable semiannually beginning on June 30, 2015 with principal due at maturity. (5) Interest payable semiannually beginning on January 31, 2017 with principal due at maturity. (6) Interest is payable quarterly on April 15 and October 15 of each year with principal due at maturity. (7) Interest accrues at the three-month EURIBOR rate (with 0% floor) plus 4.875% per annum and payable quarterly on January 15, April 15, July 15 and October 15. (8) Interest payable semiannually on January 15 and July 15 of each year beginning on July 17, 2017 with principal due at maturity. (9) Rank equally in right of payment to all indebtedness under the New Credit Facility (as subsequently defined). The Company has excluded the required payments, within the next twelve months, under the Term Loan A and Term Loan B facilities totaling $85 million and $17 million , respectively, from current liabilities as of December 31, 2018 , because the Company has the intent and ability to refinance the obligations on a long-term basis by using its revolving credit facility. The aggregate maturities applicable to the long-term debt outstanding at December 31, 2018 : Aggregate Maturities (Millions) 2019 $ 175 2020 $ 114 2021 $ 154 2022 $ 692 2023 $ 1,249 Interest expense associated with the amortization of the debt issuance costs and original issue discounts recognized in the Company's consolidated statements of income consists of the following: 2018 2017 2016 (Millions) Amortization of debt issuance fees $ 8 $ 4 $ 4 Included in the table above, is the amortization of debt issuance costs on the revolver. These are $9 million at December 31, 2018 and are recorded in "Prepayments and other current assets." As a result of the Acquisition, the Senior Secured Notes listed in the table were acquired at fair value, which resulted in recognizing a debt premium of $54 million on these notes, of which $3 million was recognized as interest income during the year ended December 31, 2018. Short-Term Debt The Company's short-term debt as of December 31, 2018 and 2017 is as follows: At December 31 2018 2017 (Millions) Maturities classified as current $ 73 $ 3 Short-term borrowings (a) 66 80 Bank overdrafts 14 20 Total short-term debt $ 153 $ 103 Weighted average interest rate on outstanding short-term borrowings at end of year 4.4 % 2.9 % (a) Includes borrowings under both committed credit facilities and uncommitted lines of credit and similar arrangements. Credit Facilities Financing Arrangements Committed Credit Facilities (a) as of December 31, 2018 Term Commitments Borrowings Letters of (b) Available (Millions) Tenneco Inc. revolving credit agreement 2023 $ 1,500 $ — $ 24 $ 1,476 Tenneco Inc. Term Loan A 2023 1,700 1,700 — — Tenneco Inc. Term Loan B 2025 1,700 1,700 — — Subsidiaries’ credit agreements 2018-2028 154 51 3 100 $ 5,054 $ 3,451 $ 27 $ 1,576 (a) The Company generally is required to pay commitment fees on the unused portion of the total commitment. (b) Letters of credit reduce the available borrowings under the revolving credit agreement. On October 1, 2018, the Company entered into a new credit agreement with JPMorgan Chase Bank, N.A., as administrative agent and other lenders (the “ New Credit Facility”) in connection with the acquisition of Federal-Mogul. The New Credit Facility consists of $4.9 billion of total debt financing, consisting of a five -year $1.5 billion revolving credit facility, a five -year $1.7 billion term loan A facility ("Term Loan A") and a seven -year $1.7 billion term loan B facility ("Term Loan B"). Proceeds from the New Credit Facility were used to finance the cash consideration portion of the Acquisition purchase price, to refinance the Company’s then existing senior credit facilities inclusive of the revolver and the tranche A term loan then outstanding (the "Old Credit Facility"), certain senior credit facilities of Federal-Mogul, and to pay fees and expenses relating to the Acquisition and the financing thereof. The remainder, including future borrowings under the revolving credit facility, will be used for general corporate purposes. The Company and Tenneco Automotive Operating Company Inc., a wholly-owned subsidiary, are borrowers under the New Credit Facility, and the Company is the sole borrower under the Term Loan A and Term Loan B facilities. The New Credit Facility is guaranteed on a senior basis by certain material domestic subsidiaries of the Company. Drawings under the revolving credit facility may be in U.S. dollars, British pounds or euros. The New Credit Facility is secured by substantially all domestic assets of the Company, the subsidiary guarantors, and by pledges of up to 66% of the stock of certain first-tier foreign subsidiaries. The security for the New Credit Facility is pari passu with the security for the outstanding senior secured notes of Federal-Mogul that were assumed by the Company in connection with the Acquisition. If any foreign subsidiary of the Company is added to the revolving credit facility as a borrower, the obligations of such foreign borrower will be secured by the assets of such foreign borrower, and also will be secured by the assets of, and guaranteed by, the domestic borrowers and domestic guarantors as well as certain foreign subsidiaries of the Company in the chain of ownership of such foreign borrower. As a result of the refinancing of the revolving credit agreement and tranche A term loan under the Old Credit Facility, the Company recorded a loss on extinguishment of debt of $10 million for the year-ended December 31, 2018, primarily consisting of debt issuance costs incurred at the transaction date and write-off of deferred debt issuance costs related to the refinanced revolving credit loan and tranche A term loan. The Company also recorded $1 million of loss on extinguishment of debt for the year ended December 31, 2017 related to amendment and restatement of the Old Credit Facility and the write-off of deferred debt issuance costs related to the Old Credit Facility. The Company recorded a $24 million loss on extinguishment of debt for the year ended December 31, 2016 for the repurchase and redemption of senior notes due 2020 and the write-off of debt issuance costs relating to those notes. New Credit Facility — Interest Rates and Fees The interest rate on borrowings under the revolving credit facility and the Term Loan A facility will initially be LIBOR plus 1.75% , which interest rate will be subject to change if the Company’s consolidated net leverage ratio changes. Initially, and so long as the Company’s corporate family rating is Ba3 (with a stable outlook) or higher from Moody’s Investors Service, Inc. (“Moody’s”) and BB- (with a stable outlook) or higher from Standard & Poor’s Financial Services LLC (“S&P”), the interest rate on borrowings under the Term Loan B facility will be LIBOR plus 2.75% ; at any time the foregoing conditions are not satisfied, the interest rate on the Term Loan B facility will be LIBOR plus 3.00% . When the Term Loan B facility is no longer outstanding and the Company and its subsidiaries have no other secured indebtedness (with certain exceptions set forth in the New Credit Facility), and upon the Company achieving and maintaining two or more corporate credit and/or corporate family ratings higher than or equal to BBB- from S&P, BBB- from Fitch Ratings Inc. (“Fitch”) and/or Baa3 from Moody’s (in each case, with a stable or positive outlook), the collateral under the New Credit Facility may be released. New Credit Facility — Other Terms and Conditions The New Credit Facility contains representations and warranties, and covenants which are customary for debt facilities of this type. The covenants limit the ability of the Company and its restricted subsidiaries to, among other things, to (i) incur additional indebtedness or issue preferred stock, (ii) pay dividends or make distributions to the Company’s stockholders, (iii) purchase or redeem the Company’s equity interests, (iv) make investments, (v) create liens on their assets, (vi) enter into transactions with the Company’s affiliates, (vii) sell assets and (viii) merge or consolidate with, or dispose of substantially all of the Company’s assets to, other companies. The New Credit Facility includes customary events of default and other provisions that could require all amounts due thereunder to become immediately due and payable, either automatically or at the option of the lenders, if the Company fails to comply with the terms of the New Credit Facility or if other customary events occur. The New Credit Facility also contains two financial maintenance covenants for the revolving credit facility and the Term Loan A facility including a requirement to have a consolidated net leverage ratio (as defined in the New Credit Facility) as of the end of each fiscal quarter of not greater than 4.0 to 1 through September 30, 2019, 3.75 to 1 through September 30, 2020 and 3.5 to 1 thereafter; and a requirement to maintain a consolidated interest coverage ratio (as defined in the New Credit Facility) for any period of four consecutive fiscal quarters of not less than 2.75 to 1. The covenants in the New Credit Facility generally prohibit the Company from repaying or refinancing its senior unsecured notes. So long as no default exists, the Company would, under its New Credit Facility, be permitted to repay or refinance our senior unsecured notes (i) with the net cash proceeds of permitted refinancing indebtedness (as defined in the New Credit Facility); (ii) in an amount equal to the net cash proceeds of qualified capital stock (as defined in the New Credit Facility) issued after October 1, 2018 and (iii) in exchange for qualified capital stock issued after October 1, 2018; and (iv) with additional payments provided that such additional payments are capped as follows based on a pro forma consolidated leverage ratio after giving effect to such additional payments. As of December 31, 2018, the Company was in compliance with all the financial covenants of the New Credit Facility. Senior Notes Senior Unsecured Notes The Company has outstanding 5.375% senior unsecured notes due December 15, 2024 ("2024 Senior Notes") and 5.000% senior unsecured notes due July 15, 2026 ("2026 Senior Notes" and together with the 2024 Senior Notes, the “Senior Unsecured Notes”) at December 31, 2018. The Company is permitted to redeem some or all of the outstanding Senior Unsecured Notes, at specified redemption prices that decline to par over a specified period, at any time (a) on or after December 15, 2019, in the case of the 2024 Senior Notes and (b) on or after July 15, 2021, in the case of the 2026 Senior Notes. In addition, the Senior Unsecured Notes may also be redeemed at a price generally equal to 100% of the principal amount thereof plus a premium based on the present values of the remaining payments due to the note holders. Further, the Company may redeem up to 35% of each Senior Unsecured Notes with the proceeds of certain equity offerings on or before July 15, 2019 at a redemption price equal to 105% , in the case of the 2026 Senior Notes. If the Company experiences specified kinds of changes in control, the Company must offer to repurchase the Senior Unsecured Notes at 101% of the principal amount thereof plus accrued and unpaid interest. In addition, if the Company sells certain of its assets and does not apply the proceeds from the sale in a certain manner within 365 days of the sale, the Company must offer to repurchase the 2024 Senior Notes at 100% of the principal amount thereof plus accrued and unpaid interest. Senior Secured Notes In connection with the Acquisition of Federal-Mogul on October 1, 2018, the Company assumed an aggregate principal amount of €350 million ( $401 million ) 5.000% euro denominated fixed rate notes which are due July 15, 2024 (" 5.000% Euro Fixed Rate Notes"), €415 million ( $476 million ) 4.875% euro denominated fixed rate notes due April 15, 2022 (" 4.875% Euro Fixed Rate Notes"), and an aggregate principal amount of €300 million ( $344 million ) floating rate notes due April 15, 2024 ("Euro Floating Rate Notes" and together with the 5.000% Euro Fixed Rate Notes and the 4.875% Euro Fixed Rate Notes, the “Senior Secured Notes”). The Company is permitted to redeem some or all of the outstanding Senior Secured Notes at specified redemption prices that decline to par over a specified period, at any time (a) on or after July 15, 2020, in the case of the 5.000% Euro Fixed Rate Notes, (b) on or after April 15, 2019, in the case of the 4.875% Euro Fixed Rate Notes and (c) on or after April 15, 2018, in the case of the Euro Floating Rate Notes. In addition, the Senior Secured Notes may also be redeemed at a price generally equal to 100% of the principal amount thereof plus a premium based on the present values of the remaining payments due to the note holders. Further, the Company may also redeem up to 40% of the 5.000% Euro Fixed Rate Notes and the 4.875% Euro Fixed Rate Notes with the proceeds of certain equity offerings at any time prior to (a) July 15, 2020 at a redemption price of 105.0% in the case of the 5.000% Euro Fixed Rate Notes, and (b) April 15, 2019 at a redemption price of 104.875% in the case of the 4.875% Euro Fixed Rate Notes. If the Company experiences specified kinds of changes in control, the Company must offer to repurchase the Senior Secured Notes at 101% of the principal amount thereof plus accrued and unpaid interest. In addition, if the Company sells certain of its assets and does not apply the proceeds from the sale in a certain manner within 365 days of the sale, the Company must offer to repurchase the Senior Secured Notes at 100% of the principal amount thereof plus accrued and unpaid interest. The Company has designated a portion of the Senior Secured Notes as a net investment hedge of its European operations. As such, the fluctuations in foreign currency exchange rates on the value of the Senior Secured Notes is recorded to cumulative translation adjustment. See Note 9, Derivatives and Hedging Activities for further details . Senior Unsecured Notes and Senior Secured Notes - Other Terms and Conditions The Senior Unsecured Notes and Senior Secured Notes contain covenants that will, among other things, limit the Company's ability to create liens and enter into sale and leaseback transactions. In addition, the Senior Secured Notes and 2024 Unsecured Senior Notes also require that, as a condition precedent to incurring certain types of indebtedness not otherwise permitted, our consolidated fixed charge coverage ratio, as calculated on a pro forma basis, be greater than 2.00, as well as containing restrictions on its operations, including limitations on: (i) incurring additional indebtedness; (ii) paying dividends; (iii) distributions and stock repurchases; (iv) investments; (v) asset sales and (vi) mergers and consolidations. Subject to limited exceptions, all of the Company's existing and future material domestic wholly owned subsidiaries fully and unconditionally guarantee its Senior Unsecured Notes and Senior Secured Notes on a joint and several basis. There are no significant restrictions on the ability of the subsidiaries that have guaranteed the Company's Senior Notes to make distributions to the Company. Other Debt Other debt consists primarily of foreign debt with maturities of one year or less. Accounts Receivable Securitization and Factoring On-Balance Sheet Arrangements The Company has securitization programs for some of its accounts receivable, with limited recourse provisions. Borrowings on these securitization programs are recorded in short-term debt. Borrowings on these securitization programs at December 31, 2018 and 2017 are as follows: As of December 31 2018 2017 (Millions) Borrowings on securitization programs $ 6 $ 30 The Company had an accounts receivable securitization program in which original equipment and aftermarket receivables were securitized on a daily basis. The Company was responsible for performing all accounts receivable administration functions for these securitized financial assets including collections and processing of customer invoice adjustments. In October 2018, this program was terminated. As of December 31, 2017, the carrying amount of assets pledged as collateral for this securitization program was $343 million . Off-Balance Sheet Arrangements In the Company's European and U.S. accounts receivable factoring programs, accounts receivables are transferred in their entirety to the acquiring entities and are accounted for as a sale. Due to the Acquisition, additional factoring arrangements in the U.S. and Europe were acquired which are also accounted for as a sale and have been included in the tables below. The fair value of assets received as proceeds in exchange for the transfer of accounts receivable under these factoring programs approximates the fair value of such receivables. Certain programs in Europe have deferred purchase price arrangements with the banks. The Company is the servicer of the receivables under some of these arrangements and is responsible for performing all accounts receivable administration functions. Where the Company receives a fee to service and monitor these transferred accounts receivables, such fees are sufficient to offset the costs and as such, a servicing asset or liability is not recorded as a result of such activities. In the U.S and Canada, the Company participates in supply chain financing programs with certain of the Company's aftermarket customers through a drafting program. The amounts outstanding for these factoring and drafting arrangements as of December 31, 2018 and 2017 are as follows: As of December 31 2018 2017 (Millions) Accounts receivable outstanding and derecognized $ 1,011 $ 406 Deferred purchase price receivable $ 154 $ 114 Proceeds from the factoring of accounts receivable qualifying as sales and drafting programs, and expenses associated with these arrangements for the years ended December 31, 2018, 2017, and 2016 are as follows: Year Ended December 31 2018 2017 2016 (Millions) Proceeds from factoring qualifying as sales $ 3,390 $ 1,984 $ 1,770 Loss on sale of receivables $ 16 $ 5 $ 5 If the Company were not able to factor receivables or sell drafts under either of these programs, its borrowings under its revolving credit agreement might increase. These programs provide the Company with access to cash at costs that are generally favorable to alternative sources of financing and allow the Company to reduce borrowings under its revolving credit agreement.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments A three-level valuation hierarchy, based upon observable and unobservable inputs, is used for fair value measurements. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect market assumptions based on the best evidence available. A financial instrument’s categorization within the hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fair value hierarchy definition prioritizes the inputs used in measuring fair value into the following levels: Level 1 — Quoted prices in active markets for identical assets or liabilities. Level 2 — Inputs, other than quoted prices in active markets, that are observable either directly or indirectly. Level 3 — Unobservable inputs based on the Company's own assumptions. Assets and Liabilities Measured at Fair Value on a Recurring Basis The following table presents assets and liabilities included in the Company's consolidated balance sheets as of December 31, 2018 and 2017 that are recognized at fair value on a recurring basis, and indicate the fair value hierarchy utilized to determine such fair value: December 31, 2018 December 31, 2017 Fair value Carrying Fair Carrying Fair Derivative instruments: (Millions) Equity swap agreement Level 2 $ 4 $ 4 $ 4 $ 4 Commodity contracts Level 2 $ (2 ) $ (2 ) $ — $ — Asset and Liability Instruments — The carrying value of cash and cash equivalents, restricted cash, short and long-term receivables, accounts payable, and short-term debt approximates fair value. Cash-settled Share Swap Transactions — The fair value of the equity swap agreement is recorded in "Prepayments and other current assets" in the consolidated balance sheets. The fair value of the Company's equity swap agreement was a net asset position of $4 million at December 31, 2018 and 2017. Commodity contracts — The Company calculates the fair value of its commodity contracts and foreign currency contracts using quoted commodity forward rates and quoted currency forward rates, to calculate forward values, and then discounts the forward values. The discount rates for all derivative contracts are based on quoted bank deposit rates. Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis In addition to items measured at fair value on a recurring basis, assets may be measured at fair value on a nonrecurring basis. These assets include long-lived assets and intangible assets which may be written down to fair value as a result of impairment. The Company has determined the fair value measurements related to each of these rely primarily on Company-specific inputs and the Company's assumptions about the use of the assets, as observable inputs are not available (level 3). To determine the fair value of long-lived asset groups, the Company utilizes discounted cash flows expected to be generated by the long-lived asset group. The Company evaluates the carrying value of its goodwill and indefinite-lived intangible assets for impairment annually in the fourth quarter of each year. These fair value measurements require the Company to make significant assumptions and estimates about the extent and timing of future cash flows, discount rates, and growth rates, which are subject to a high degree of uncertainty. The Company believes the assumptions and estimates used to determine the estimated fair value are reasonable, but different assumptions could materially affect the estimated fair value. During the year ended December 31, 2018, the Company recorded a $3 million impairment charge for one of its reporting units. See Note 7, Goodwill and Other Intangible Assets . Financial Instruments Not Carried at Fair Value Estimated fair values of the Company's outstanding debt were: December 31, 2018 December 31, 2017 Fair value Carrying Fair Carrying Fair Long-term debt (including current maturities): (Millions) Term loans and senior notes Level 2 $ 5,307 $ 5,218 $ 1,346 $ 1,383 The fair value of the Company's public senior notes and private borrowings under its senior credit facility is based on observable inputs. The Company also had $106 million and $15 million in other debt whose carrying value approximates fair value, which consists primarily of foreign debt with maturities of one year or less.

Accrued Expenses and Other Curr

Accrued Expenses and Other Current Liabilities	12 Months Ended
	Dec. 31, 2018
Other Income and Expenses [Abstract]
Accrued Expenses and Other Current Liabilities	Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities at December 31, 2018 and 2017 included the following: December 31 2018 2017 (Millions) Accrued rebates $ 189 $ 68 Product return reserves 95 16 Restructuring liabilities 91 16 Legal reserves 71 88 Non-income tax payable 67 52 Pension and postretirement benefits liability 50 14 Accrued freight 48 26 Liabilities held for sale 39 — Accrued warranty 39 23 Accrued interest 33 14 Accrued professional services 31 8 Environmental reserve 12 2 Other 236 97 $ 1,001 $ 424

Pension Plans, Postretirement a

Pension Plans, Postretirement and Other Employee Benefits	12 Months Ended
	Dec. 31, 2018
Pension Plans, Postretirement and Other Employee Benefits	Pension Plans, Postretirement and Other Employee Benefits Defined Contribution Plans Effective January 1, 2012, the Tenneco Employee Stock Ownership Plan for Hourly Employees and the Tenneco Employee Stock Ownership Plan for Salaried Employees were merged into one plan called the Tenneco 401(k) Retirement Savings Plan (the “Retirement Savings Plan”). The Retirement Savings Plan allows for an enhanced company match and contributions for all eligible salaried and hourly employees. As a result of the Acquisition, the Company acquired Federal-Mogul's 401(k) Retirement Savings Plan. The Company recorded expense for contributions to its plans of approximately $43 million , $29 million and $28 million in 2018 , 2017 and 2016 , respectively. Defined Benefit Plans The Company sponsors defined benefit pension plans, and health care and life insurance benefits for certain employees and retirees around the world. There is also an unfunded nonqualified pension plan primarily covering U.S. executives. The funding policy for defined benefit pension plans is to contribute the minimum required by applicable laws and regulations or to directly pay benefit payments where appropriate. At December 31, 2018, all legal funding requirements had been met. The Company expects to contribute $26 million to its U.S. pension plans, $42 million to its non-U.S. pension plans, and $28 million to its other postretirement plans in 2019. Other Benefits The Company also provides benefits to former or inactive employees paid after employment but before retirement. The liabilities for such U.S. and European postemployment benefits were $75 million and $9 million as of December 31, 2018 and 2017 . Significant Events As a result of the Acquisition, the Company assumed $848 million in underfunded defined benefit pension and other postretirement benefit obligations. In December 2018, the Company approved an amendment for one of its U.S. postretirement medical benefit plans. Beginning June 1, 2019, eligible retirees that opt to receive benefits will receive a fixed subsidiary payment to purchase health care benefits on a marketplace exchange in lieu of the original plan’s medical benefits. The amendments to the plan resulted in a plan remeasurement and recognition of a negative plan amendment, which reduced the Company's obligation by $66 million with a corresponding increase of $51 million in AOCI (net of taxes of $16 million ) as of December 31, 2018. The $66 million is being amortized on a straight-line basis as a reduction to net periodic postretirement benefit cost over participants' average remaining service periods. In February 2016, the Company launched a voluntary program to buy out active employees and retirees who had earned benefits in the U.S. pension plans. As of December 31, 2016, this program had been substantially completed with cash payments to those who elected to take the buyout made from pension plan assets in the fourth quarter of 2016. In connection with this program the Company contributed $18 million into the pension trust and recognized a non-cash charge of $72 million . The program was completed in the first quarter of 2017, at which time we contributed another $10 million and recognize a non-cash charge of $6 million during the year ended December 31, 2017. The measurement date for all defined benefit plans is December 31. The following provides a reconciliation of the plans’ benefit obligations, plan assets, and funded status as of December 31, 2018 and 2017: Pension Plans Other Postretirement Benefits Plans U.S. Non-U.S. 2018 2017 2018 2017 2018 2017 (Millions) Change in benefit obligation: Benefit obligation, beginning of year $ 263 $ 272 $ 471 $ 438 $ 151 $ 143 Federal-Mogul acquisition 1,064 — 545 — 263 — Service cost 1 1 13 9 — — Interest cost 21 10 15 13 8 5 Settlement (1 ) (7 ) (13 ) (3 ) — — Curtailment — — — — (1 ) — Administrative expenses/taxes paid — — (3 ) (2 ) — — Plan amendments — — 2 — (66 ) — Actuarial (gain)/loss (12 ) 10 (16 ) (9 ) (24 ) 12 Benefits paid (34 ) (23 ) (22 ) (18 ) (15 ) (10 ) Medicare subsidies received — — — — 1 — Participants’ contributions — — 1 1 1 — Held for sale — — (16 ) — — — Currency rate conversion and other — — (31 ) 42 4 1 Benefit obligation, end of year 1,302 263 946 471 322 151 Change in plan assets: Fair value of plan assets, beginning of year 202 192 438 369 — — Federal-Mogul acquisition 943 — 81 — — — Settlement (1 ) (7 ) (14 ) (3 ) — — Actual return on plan assets (122 ) 22 (1 ) 42 — — Administrative expenses/taxes paid — — — (2 ) — — Employer contributions 6 18 21 14 13 10 Medicare subsidies received — — — — 1 — Participants’ contributions — — 1 1 1 — Benefits paid (33 ) (23 ) (25 ) (18 ) (15 ) (10 ) Held for sale — — (10 ) — — — Currency rate conversion and other — — (25 ) 35 — — Fair value of plan assets, end of year 995 202 466 438 — — Funded status of the plans $ (307 ) $ (61 ) $ (480 ) $ (33 ) $ (322 ) $ (151 ) Amounts recognized on the consolidated balance sheets consist of the following as of December 31, 2018 and 2017: Pension Plans Other Postretirement Benefits Plans U.S. Non-U.S. 2018 2017 2018 2017 2018 2017 (Millions) Noncurrent assets $ — $ — $ 33 $ 28 $ — $ — Current liabilities (5 ) (2 ) (17 ) (3 ) (28 ) (9 ) Noncurrent liabilities (a) (302 ) (59 ) (496 ) (58 ) (294 ) (142 ) $ (307 ) $ (61 ) $ (480 ) $ (33 ) $ (322 ) $ (151 ) (a) The "pension and postretirement benefits" line in the consolidated balance sheets includes $75 million and $9 million as of December 31, 2018 and 2017 of postemployment benefits which are not included in the table above. Amounts recognized in accumulated other comprehensive loss for pension and postretirement benefits, inclusive of tax effects, consist of the following components as of December 31, 2018 and 2017: Pension Plans Other Postretirement Benefits Plans U.S. Non-U.S. 2018 2017 2018 2017 2018 2017 (Millions) Actuarial loss $ 255 $ 130 $ 80 $ 91 $ 31 $ 51 Prior service cost/(credit) — — 4 3 (73 ) — Total $ 255 $ 130 $ 84 $ 94 $ (42 ) $ 51 Information for defined benefit plans with projected benefit obligations in excess of plan assets: Pension Plans Other Postretirement Benefits Plans 2018 2017 U.S. Non-U.S. U.S. Non-U.S. 2018 2017 (Millions) Projected benefit obligation $ 1,302 $ 652 $ 263 $ 130 $ 322 $ 151 Fair value of plan assets $ 995 $ 138 $ 202 $ 69 $ — $ — Information for pension plans with accumulated benefit obligations in excess of plan assets: December 31, 2018 December 31, 2017 U.S. Non-U.S. U.S. Non-U.S. (Millions) Projected benefit obligation $ 1,302 $ 620 $ 263 $ 117 Accumulated benefit obligation $ 1,302 $ 606 $ 263 $ 112 Fair value of plan assets $ 995 $ 111 $ 202 $ 56 The accumulated benefit obligation for all pension plans is $2,225 million and $728 million as of December 31, 2018 and 2017 . Net periodic pension and postretirement benefits costs for the years 2018 , 2017 and 2016 , consist of the following components: Pension Plans Other Postretirement Benefits Plans U.S. Non-U.S. 2018 2017 2016 2018 2017 2016 2018 2017 2016 (Millions) Service cost $ 1 $ 1 $ 1 $ 14 $ 9 $ 8 $ — $ — $ — Interest cost 21 10 15 15 13 14 8 5 6 Expected return on plan assets (28 ) (14 ) (23 ) (18 ) (25 ) (20 ) — — — Curtailment loss — — — — — — 1 — — Settlement loss 1 8 72 3 1 — — — — Net amortization: Actuarial loss 5 5 8 6 9 7 5 4 5 Prior service cost (credit) — — — 1 1 1 — (1 ) (1 ) Net periodic costs $ — $ 10 $ 73 $ 21 $ 8 $ 10 $ 14 $ 8 $ 10 The following assumptions were used in the accounting for the pension and other postretirement benefits plans for the years of 2018 , 2017 , and 2016 : Pension Plans Other Postretirement Benefits Plans U.S. Non-U.S. 2018 2017 2016 2018 2017 2016 2018 2017 2016 Weighted-average assumptions used to determine benefit obligations: Discount rate 4.2 % 3.8 % 4.2 % 2.6 % 2.6 % 2.8 % 4.3 % 3.8 % 4.2 % Rate of compensation increase n/a n/a n/a — % 2.5 % 2.5 % n/a n/a n/a Weighted-average assumptions used to determine net periodic benefit cost: Discount rate 4.1 % 4.2 % 4.3 % 2.4 % 2.8 % 3.5 % 4.2 % 4.2 % 4.3 % Expected long-term return on plan assets 6.0 % 7.8 % 7.6 % 4.2 % 5.2 % 5.7 % n/a n/a n/a Rate of compensation increase n/a n/a n/a 2.9 % 2.5 % 2.7 % n/a n/a n/a Estimated amounts to be amortized from accumulated other comprehensive loss into net periodic benefit cost in the year ending December 31, 2019 based on December 31, 2018 plan measurements: 2019 Pension Plans Other Postretirement Benefits Plans U.S. Non-U.S (Millions) Net actuarial loss $ 5 $ 5 $ 4 Prior service cost — 1 (8 ) $ 5 $ 6 $ (4 ) Estimated future benefit payments are as follows: Pension Plans Other Postretirement Benefits Plans Year U.S. Non-U.S. (Millions) 2019 $ 100 $ 43 $ 28 2020 $ 99 $ 44 $ 28 2021 $ 99 $ 43 $ 27 2022 $ 101 $ 45 $ 26 2023 $ 100 $ 49 $ 26 2024-2028 $ 442 $ 243 $ 113 Health Care Trend The weighted-average assumed health care cost trend rate used in determining next year's postretirement health care benefits are as follows: Other Postretirement Benefits Plans 2018 2017 2016 Initial health care cost trend rate 6.9 % 6.8 % 7.0 % Ultimate health care cost trend rate 4.9 % 4.5 % 4.5 % Year ultimate health care cost trend rate reached 2027 2027 2026 The assumed health care cost trend rate has a significant effect on the amounts reported for other postretirement benefits plans. The following table illustrates the sensitivity to a change in the assumed health care cost trend rate: Total Service and Interest Cost Postretirement Benefits Obligation (Millions) 100 basis point ("bp") increase in health care cost trend rate $ 1 $ 23 100 bp decrease in health care cost trend rate $ (1 ) $ (20 ) Long-term Rate of Return The Company's expected return on assets is established annually through analysis of anticipated future long-term investment performance for the plan based upon the asset allocation strategy and is primarily a long-term prospective rate. An analysis was performed in December 2018 resulting in changes to the expected long-term rate of return on assets. The weighted-average long-term rate of return on assets for the U.S. pension plans decreased from 7.75% at December 31, 2017 to 6.00% at December 31, 2018. The expected long-term rate of return on plan assets used in determining pension expense for non-U.S. plans is determined in a similar manner to the U.S. plans and decreased from 5.25% at December 31, 2017 to 4.2% at December 31, 2018. Plan Assets Certain pension plans sponsored by the Company invest in a diversified portfolio consisting of an array of asset classes that attempts to maximize returns while minimizing volatility. These asset classes include developed market equities, emerging market equities, private equity, global high quality and high yield fixed income, real estate, and absolute return strategies. U.S. Plan The U.S. investment strategy mitigates risk by incorporating diversification across appropriate asset classes to meet the plan’s objectives. It is intended to reduce risk, provide long-term financial stability for the plan, and maintain funded levels that meet long-term plan obligations while preserving sufficient liquidity for near-term benefit payments. Risk assumed is considered appropriate for the return anticipated and consistent with the diversification of plan assets. Approximately 49% of the U.S. plan assets were invested in actively managed investment funds. The Company’s investment strategy includes a target asset allocation of 60% equity investments, 15% fixed income investments, 15% debt securities, and 10% in other investment types including hedge funds. Non-U.S. Plans The Company's non-U.S. plans are individually managed to different target levels depending on the investing environment in each country and the funded status of each plan, with an increased allocation of assets to equity and fixed income securities at higher funded ratios. The insurance contracts guarantee a minimum rate of return. The Company has no input into the investment strategy of the assets underlying the contracts, but they are typically heavily invested in active bond markets and are highly regulated by local law. Pension plan assets were invested in the following classes of securities: Percentage of Fair Market Value December 31, 2018 U.S. Non-U.S. Equity securities 62 % 32 % Fixed income securities 17 % 5 % Debt securities 11 % 43 % Insurance contracts — % 15 % Other 10 % 5 % The assets of some of the Company's pension plans are invested in trusts that permit commingling of the assets of more than one employee benefit plan for investment and administrative purposes. Each of the plans participating in the trust has interests in the net assets of the underlying investment pools. The following table presents the Company’s defined benefit plan assets measured at fair value by asset class: Fair Value Level as of December 31, 2018 U.S. Non-U.S. Asset Category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (Millions) Investments with registered investment companies: Equity securities $ 323 $ — $ — $ 323 $ 1 $ — $ — $ 1 Fixed income securities 167 — — 167 21 — — 21 Real estate and other 41 — — 41 — — — — Equity securities 194 — — 194 14 55 — 69 Debt securities: Corporate and other — 18 — 18 8 — — 8 Government 12 21 — 33 2 147 — 149 Real Estate and other — — — — 1 4 — 5 Insurance contracts — — — — — — 71 71 Hedge funds — — 28 28 — — — — Cash and equivalents 33 — — 33 17 — — 17 Total $ 770 $ 39 $ 28 $ 837 $ 64 $ 206 $ 71 $ 341 Plan assets measured at net asset value Equity securities $ 104 $ 81 Government debt securities — 30 Corporate and other debt securities 54 14 Total plan assets measured at net asset value 158 125 Net plan assets $ 995 $ 466 Fair Value Level as of December 31, 2017 U.S. Non-U.S. Asset Category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (Millions) Equity securities $ 21 $ — $ — $ 21 $ 16 $ 101 $ — $ 117 Debt securities: Corporate and other — — — — 6 16 — 22 Government — — — — 2 112 — 114 Real Estate and other — — — — 1 6 — 7 Insurance contracts — — — — — 16 9 25 Cash and equivalents 2 — — 2 9 1 — 10 Total $ 23 $ — $ — $ 23 $ 34 $ 252 $ 9 $ 295 Plan assets measured at net asset value Equity securities $ 120 $ 97 Government debt securities — 32 Corporate and other debt securities 59 14 Total plan assets measured at net asset value 179 143 Net plan assets $ 202 $ 438 The Company's level 1 assets were valued using market prices based on daily net asset value ("NAV") or prices available daily through a public stock exchange. Its level 2 assets were valued primarily using market prices, sometimes net of estimated realization expenses, and based on broker/dealer markets or in commingled funds where NAV is not available daily or publicly. For insurance contracts, the estimated surrender value of the policy was used to estimate fair market value. The table below summarizes the changes in the fair value of the Level 3 assets: December 31, 2018 December 31, 2017 Level 3 Assets Level 3 Assets U.S. Non-U.S. U.S. Non-U.S. (Millions) (Millions) Balance at December 31 of the previous year $ — $ 9 $ — $ 9 Federal-Mogul acquisition 30 56 — — Net realized/unrealized gains (loss) (2 ) 1 — — Purchases and settlements, net — — — — Sales, net — — — — Transfers into (out) of Level 3 — 15 — — Held for sale — (10 ) Foreign currency exchange rate movements — — — — Ending Balance at December 31 $ 28 $ 71 $ — $ 9 The following table contains information about significant concentrations of risk, including all individual assets that make up more than 5% of the total assets and any direct investments in Tenneco stock: Asset Category Fair Value Level Value Percentage of (Millions) 2018: Tenneco stock 1 $ 10 0.7 % 2017: Tenneco stock 1 $ 21 3.3 % The Company's approach to determining expected return on plan asset assumptions evaluates both historical returns as well as estimates of future returns, and adjusts for any expected changes in the long-term outlook for the equity and fixed income markets for both its U.S. and Non-U.S. plans.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The domestic and foreign components of the Company's earnings before income taxes and noncontrolling interests are as follows: Year Ended December 31, 2018 2017 2016 (Millions) U.S. income earnings (loss) before income taxes $ (138 ) $ (28 ) $ 52 Foreign earnings (loss) before income taxes 312 364 359 Earnings (loss) before income taxes and noncontrolling interests $ 174 $ 336 $ 411 Following is a comparative analysis of the components of income tax expense (benefit): Year Ended December 31, 2018 2017 2016 (Millions) Current — U.S. federal $ 8 $ (23 ) $ (9 ) State and local 1 1 4 Foreign 119 101 85 128 79 80 Deferred — U.S. federal (35 ) 16 (95 ) State and local (5 ) (3 ) (1 ) Foreign (25 ) (21 ) 12 (65 ) (8 ) (84 ) Income tax expense (benefit) $ 63 $ 71 $ (4 ) Following is a reconciliation of income taxes computed at the statutory U.S. federal income tax rate ( 21% for 2018 and 35% for 2017 and 2016 ) to the income tax expense (benefit) reflected in the consolidated statements of income: Year Ended December 31, 2018 2017 2016 (Millions) Income tax expense computed at the statutory U.S. federal income tax rate $ 37 $ 117 $ 144 Increases (reductions) in income tax expense resulting from: Foreign income taxed at different rates 19 (48 ) (42 ) Transition Tax under Tax Cuts and Jobs Act ("TCJA") 11 43 — Re-measurement of Worldwide Deferred Taxes — 53 — State and local taxes on income, net of U.S. federal income tax benefit (6 ) (2 ) 3 Changes in valuation allowance for tax loss carryforwards and credits — (1 ) 18 Investment and R&D tax credits (12 ) (6 ) (6 ) Foreign earnings subject to U.S. federal income tax 9 (74 ) (101 ) Tax contingencies 1 (1 ) (7 ) Other 4 (10 ) (13 ) Income tax expense (benefit) $ 63 $ 71 $ (4 ) The Company reported income tax expense of $63 million in 2018 , $71 million in 2017 and a tax benefit of $4 million in 2016 . The tax expense recorded in 2018 included tax benefits of $10 million relating to a valuation allowance release at its Australian entities and $11 million of tax expense for changes in the toll tax as discussed below. The tax expense recorded in 2017 includes a net provisional tax expense of $43 million for one-time transition tax on deemed repatriation of previously deferred foreign earnings under the Tax Cuts and Jobs Act ("TCJA") as discussed below. The Company remeasured U.S. deferred taxes from an applicable federal rate of 35% to the new statutory rate of 21% at which they are expected to be utilized, recording a $51 million provisional expense. The tax expense recorded in 2017 included a net tax benefit of $74 million relating to recognizing a U.S. tax benefit for foreign taxes. The tax expense recorded in 2016 included a net tax benefit of $110 million primarily relating to the recognition of a U.S. tax benefit for foreign taxes. In 2016, the Company completed its detailed analysis of its ability to recognize and utilize foreign tax credits within the carryforward period. As a result, the Company amended its U.S. federal tax returns for the years 2006 to 2012 to claim foreign tax credits in lieu of deducting foreign taxes paid. The U.S. foreign tax credit law provides for a credit against U.S. taxes otherwise payable for foreign taxes paid with regard to dividends, interest and royalties paid to the Company in the U.S. Income tax expense also decreased in 2016 as a result of the mix of earnings in the Company's various tax jurisdictions. On December 22, 2017, the TCJA was enacted into U.S. law, which, among other provisions, lowered the corporate income tax rate effective January 1, 2018 from 35% to 21% , and implemented significant changes with respect to U.S. tax treatment of earnings originating from outside the U.S. Many of the provisions of TCJA are subject to regulatory interpretation and U.S. state conforming enactments. The Internal Revenue Service (IRS) issued Notice 2018-26 on April 2, 2018 and issued proposed regulations under Section 965 on August 1, 2018, which provided additional guidance to assist taxpayers in computing the toll tax. Based on the new guidance, an $11 million discrete charge was recorded in income tax expense in 2018. The Company has completed our accounting for the tax effects of the enactment as of December 31, 2018. The Company elected to account for Global Intangible Low-Taxed Income (“GILTI”) as a current-period expense when incurred. Therefore, the Company has not recorded deferred taxes for basis differences expected to reverse in the future periods. The components of the Company's net deferred tax assets were as follows: December 31, 2018 2017 (Millions) Deferred tax assets — Tax loss carryforwards: State $ 18 $ 19 Foreign 364 114 Tax credits 159 118 Postretirement benefits other than pensions 21 37 Pensions 158 24 Payroll accruals 24 18 Book over tax depreciation 68 (45 ) Other accruals 163 80 Valuation allowance (514 ) (163 ) Total deferred tax assets 461 202 Deferred tax liabilities — Amortization of intangibles 82 — Total deferred tax liabilities 82 — Net deferred tax assets $ 379 $ 202 State tax loss carryforwards have been presented net of uncertain tax positions that, if realized, would reduce tax loss carryforwards in both 2018 and 2017 by $2 million . Additionally, foreign tax loss carryforwards, have been presented net of uncertain tax positions that, if realized, would reduce tax loss carryforwards in 2018 and 2017 by $68 million and $7 million , respectively. December 31, 2018 2017 (Millions) Consolidated Balance Sheets: Non-current portion — deferred tax asset $ 467 $ 213 Non-current portion — deferred tax liability (88 ) (11 ) Net deferred tax assets $ 379 $ 202 We evaluate our deferred income taxes quarterly to determine if valuation allowances are required or should be adjusted. This assessment considers, among other matters, the nature, frequency and amount of recent losses, the duration of statutory carryforward periods, and tax planning strategies. In making such judgments, significant weight is given to evidence that can be objectively verified. If recent operational improvements continue in our foreign subsidiaries or if certain restructuring steps are completed as part of the Federal-Mogul acquisition and future spin of the Ride Performance / Aftermarket company, we believe it is reasonably possible that sufficient positive evidence may be available to release all, or a portion, of its valuation allowance in the next twelve months. This may result in a one-time tax benefit of up to $51 million , primarily related to Spain, China, and Czech Republic. As a result of the valuation allowances recorded of $514 million and $163 million at December 31, 2018 and 2017 , respectively, the Company has potential tax assets that were not recognized on its consolidated balance sheets. These unrecognized tax assets resulted primarily from foreign tax loss carryforwards, foreign investment tax credits, foreign research and development credits and U.S. state net operating losses ("NOLs") that are available to reduce future tax liabilities. The Company's state NOLs expire in various tax years through 2039. The Company's non-U.S. NOLs expire in various tax years through 2038, or have unlimited carryforward potential. The Company does not provide for U.S. income taxes on unremitted earnings of foreign subsidiaries, except for the earnings of certain of its China operations and in certain of its joint ventures in Spain, South Korea, and India, as its present intention is to reinvest the unremitted earnings in its foreign operations. Unremitted earnings of foreign subsidiaries were approximately $2.6 billion at December 31, 2018 . The Company estimated that the amount of U.S. and foreign income taxes that would be accrued or paid upon remittance of the assets that represent those unremitted earnings was $117 million . A tax benefit from an uncertain tax position may be recognized when it is “more likely than not” that the position will be sustained upon examination, including resolutions of any related appeals or litigation processes, based on the technical merits. A reconciliation of the Company's uncertain tax positions is as follows: 2018 2017 2016 (Millions) Uncertain tax positions — Balance January 1 $ 112 $ 111 $ 123 Gross increases in tax positions due to acquisition 110 — — Gross increases in tax positions in current period 8 6 6 Gross increases in tax positions in prior period 7 2 2 Gross decreases in tax positions in prior period (1 ) (2 ) (5 ) Gross decreases — settlements (2 ) — — Gross decreases — statute of limitations expired (10 ) (5 ) (15 ) Balance December 31 $ 224 $ 112 $ 111 Included in the balance of uncertain tax positions were $134 million in 2018 , $108 million in 2017 , $108 million in 2016 , of tax benefits, that if recognized, would affect the effective tax rate. The Company recognizes accrued interest and penalties related to unrecognized tax benefits as income tax expense. Penalties of less than $1 million were accrued in 2018 , 2017 and 2016 . Additionally, the Company accrued interest expense related to uncertain tax positions of $2 million in 2018 , and interest expense of less than $1 million in both 2017 and 2016 . The Company's liability for penalties was $12 million at December 31, 2018 , and $1 million at both December 31, 2017 and December 31, 2016 , and its liability for interest was $11 million at December 31, 2018 and $4 million at both December 31, 2017 and December 31, 2016 . The Company's uncertain tax position at December 31, 2018 and 2017 included exposures relating to the disallowance of deductions, global transfer pricing and various other issues. The Company believes it is reasonably possible that a decrease of up to $14 million in unrecognized tax benefits related to the expiration of U.S. and foreign statute of limitations and the conclusion of income tax examinations may occur within the next twelve months. The Company is subject to taxation in the U.S. and various state and foreign jurisdictions. As of December 31, 2018 , the Company's tax years open to examination in primary jurisdictions are as follows: Open To Tax United States 2003 Belgium 2016 Brazil 2014 China 2009 Germany 2009 Mexico 2013 Poland 2013 Spain 2000 United Kingdom 2015 Italy 2013 France 2009 India 1995

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Capital Commitments The Company estimates expenditures aggregating to approximately $181 million will be required after December 31, 2018 to complete facilities and projects authorized at such date, and it has made substantial commitments in connection with these facilities and projects. Lease Commitments The Company's facilities and equipment are generally leased under arrangements that are accounted for as operating leases. Total rental expense for the years ended December 31, 2018 , 2017 and 2016 was $111 million , $81 million and $74 million , respectively. Future minimum operating lease payments at December 31, 2018 are as follows: (Millions) 2019 $ 120 2020 100 2021 86 2022 68 2023 56 Beyond 2023 53 Total minimum lease payments $ 483 Certain equipment is leased under long term agreements. Capital assets for these agreements were $2 million and $1 million at December 31, 2018 and 2017 . The minimum lease payments under our non-cancellable capital leases with lease terms in excess of one year are less than $1 million in each of the next five years. Environmental Matters The Company is subject to a variety of environmental and pollution control laws and regulations in all jurisdictions in which it operates. The Company has been notified by the U.S. Environmental Protection Agency, other national environmental agencies, and various provincial and state agencies it may be a potentially responsible party (“PRP”) under such laws for the cost of remediating hazardous substances pursuant to the Comprehensive Environmental Response, Compensation, and Liability Act ("CERCLA") and other national and state or provincial environmental laws. PRP designation typically requires the funding of site investigations and subsequent remedial activities. Many of the sites that are likely to be the costliest to remediate are often current or former commercial waste disposal facilities to which numerous companies sent wastes. Despite the potential joint and several liability which might be imposed on the Company under CERCLA and some of the other laws pertaining to these sites, its share of the total waste sent to these sites generally has been small. The Company believes its exposure for liability at these sites is limited. On a global basis, the Company has also identified certain other present and former properties at which it may be responsible for cleaning up or addressing environmental contamination, in some cases as a result of contractual commitments and/or federal or state environmental laws. The Company is actively seeking to resolve these actual and potential statutory, regulatory, and contractual obligations. The Company expenses or capitalizes, as appropriate, expenditures for ongoing compliance with environmental regulations. As of December 31, 2018 , the Company has an obligation to remediate or contribute towards the remediation of certain sites, including the sites discussed above at which it may be a PRP. The Company's aggregated estimated share of environmental remediation costs for all these sites on a discounted basis was approximately $40 million as of December 31, 2018 , of which $12 million is recorded in accrued expenses and other current liabilities and $28 million is recorded in deferred credits and other liabilities in the consolidated balance sheets. For those locations where the liability was discounted, the weighted average discount rate used was 2.9% . The undiscounted value of the estimated remediation costs was $46 million as of December 31, 2018 . The Company's expected payments of environmental remediation costs for non-indemnified locations are estimated to be approximately $10 million in 2019 , $6 million in 2020, $3 million in both 2021 and 2022, $2 million in 2023 and $16 million in the aggregate thereafter. In addition to amounts described above, the Company estimates it will make expenditures for property, plant and equipment for environmental matters of approximately $14 million in 2019 and $7 million in 2020. Based on information known to the Company from site investigations and the professional judgment of consultants, the Company has established reserves it believes are adequate for these costs. Although the Company believes these estimates of remediation costs are reasonable and are based on the latest available information, the costs are estimates, difficult to quantify based on the complexity of the issues, and are subject to revision as more information becomes available about the extent of remediation required. At some sites, the Company expects other parties will contribute to the remediation costs. In addition, certain environmental statutes provide that the Company's liability could be joint and several, meaning that the Company could be required to pay amounts in excess of its share of remediation costs. The financial strength of the other PRPs at these sites has been considered, where appropriate, in the determination of the estimated liability. The Company does not believe any potential costs associated with its current status as a PRP, or as a liable party at the other locations referenced herein, will be material to its annual consolidated financial position, results of operations, or liquidity. Antitrust Investigations and Litigation On March 25, 2014, representatives of the European Commission (EC) were at Tenneco GmbH's Edenkoben, Germany administrative facility to gather information in connection with an ongoing global antitrust investigation concerning multiple automotive suppliers. On the same date, the Company also received a related subpoena from the U.S. Department of Justice (“DOJ”). On November 5, 2014, the DOJ granted conditional leniency to Tenneco, its subsidiaries and its 50% affiliates as of such date ("2014 Tenneco Entities") pursuant to an agreement the Company entered into under the Antitrust Division's Corporate Leniency Policy. This agreement provides important benefits to the 2014 Tenneco Entities in exchange for the Company's self-reporting of matters to the DOJ and its continuing full cooperation with the DOJ's resulting investigation. For example, the DOJ will not bring any criminal antitrust prosecution against the 2014 Tenneco Entities, nor seek any criminal fines or penalties, in connection with the matters the Company reported to the DOJ. Additionally, there are limits on the liability of the 2014 Tenneco Entities related to any follow-on civil antitrust litigation in the United States. The limits include single rather than treble damages, as well as relief from joint and several antitrust liability with other relevant civil antitrust action defendants. These limits are subject to the Company satisfying the DOJ and any court presiding over such follow-on civil litigation. On April 27, 2017, the Company received notification from the EC that it has administratively closed its global antitrust inquiry regarding the production, assembly, and supply of complete exhaust systems. No charges against the Company or any other competitor were initiated at any time and the EC inquiry is now closed. Certain other competition agencies are also investigating possible violations of antitrust laws relating to products supplied by the Company and its subsidiaries, including Federal-Mogul. The Company has cooperated and continues to cooperate fully with all of these antitrust investigations, and take other actions to minimize its potential exposure. The Company and certain of its competitors are also currently defendants in civil putative class action litigation, and are subject to similar claims filed by other plaintiffs, in the United States and Canada. More related lawsuits may be filed, including in other jurisdictions. Plaintiffs in these cases generally allege that defendants have engaged in anticompetitive conduct, in violation of federal and state laws, relating to the sale of automotive exhaust systems or components thereof. Plaintiffs seek to recover, on behalf of themselves and various purported classes of purchasers, injunctive relief, damages and attorneys’ fees. However, as explained above, because the DOJ granted conditional leniency to the 2014 Tenneco Entities, the Company's civil liability in U.S. follow-on actions with respect to these entities is limited to single damages and the Company will not be jointly and severally liable with the other defendants, provided that the Company has satisfied its obligations under the DOJ leniency agreement and approval is granted by the presiding court. Typically, exposure for follow-on actions in Canada is less than the exposure for U.S. follow-on actions. Following the EC’s decision to administratively close its antitrust inquiry into exhaust systems in 2017, receipt by the 2014 Tenneco Entities of conditional leniency from the DOJ and discussions during the third quarter of 2017 following the appointment of a special settlement master in the civil putative class action cases pending against the Company and/or certain of its competitors in the United States, the Company continues to vigorously defend itself and/or take actions to minimize its potential exposure to matters pertaining to the global antitrust investigation, including engaging in settlement discussions when it is in the best interests of the Company and its stockholders. For example, in October 2017, the Company settled an administrative action brought by Brazil's competition authority for an amount that was not material. In December 2018, the Company settled a separate administrative action brought by Brazil’s competition authority against a Federal-Mogul subsidiary, also for an amount that was not material. Additionally, in February 2018, the Company settled civil putative class action litigation in the United States brought by classes of direct purchasers, end-payors and auto dealers. No other classes of plaintiffs have brought claims against the Company in the United States. Based upon those earlier developments, including settlement discussions, The Company established a reserve of $132 million in its second quarter 2017 financial results for settlement costs that were probable, reasonably estimable, and expected to be necessary to resolve its antitrust matters globally, which primarily involves the resolution of civil suits and related claims. Of the $132 million reserve that was established, $79 million was paid through December 31, 2018 resulting in a remaining reserve of $53 million as of December 31, 2018, which is recorded in accrued expenses and other current liabilities in the Company's consolidated balance sheets. While the Company, including its Federal-Mogul subsidiaries, continues to cooperate with certain competition agencies investigating possible violations of antitrust laws relating to products supplied by the Company, and the Company may be subject to other civil lawsuits and/or related claims, no amount of this reserve is attributable to matters with the DOJ or the EC, and no such amount is expected based on current information. The Company's reserve for its antitrust matters is based upon all currently available information and an assessment of the probability of events for those matters where the Company can make a reasonable estimate of the costs to resolve such outstanding matters. The Company's estimate involves significant judgment, given the number, variety and potential outcomes of actual and potential claims, the uncertainty of future rulings and approvals by a court or other authority, the behavior or incentives of adverse parties or regulatory authorities, and other factors outside of its control. As a result, the Company's reserve may change from time to time, and actual costs may vary. Although the ultimate outcome of any legal matter cannot be predicted with certainty, based on current information, the Company does not expect that any such change in the reserve will have a material adverse impact on the Company's annual consolidated financial position, results of operations or liquidity. Other Legal Proceedings, Claims and Investigations For many years the Company has been and continues to be subject to lawsuits initiated by claimants alleging health problems as a result of exposure to asbestos. The Company's current docket of active and inactive cases is less than 500 cases in the United States and less than 50 in Europe. With respect to the claims filed in the United States, the substantial majority of the claims are related to alleged exposure to asbestos in the Company's line of Walker® exhaust automotive products although a significant number of those claims appear also to involve occupational exposures sustained in industries other than automotive. A small number of claims have been asserted against one of the Company's subsidiaries by railroad workers alleging exposure to asbestos products in railroad cars. The Company believes, based on scientific and other evidence, it is unlikely that U.S. claimants were exposed to asbestos by the Company's former products and that, in any event, they would not be at increased risk of asbestos-related disease based on their work with these products. Further, many of these cases involve numerous defendants, with the number in some cases exceeding 100 defendants from a variety of industries. Additionally, in many cases the plaintiffs either do not specify any, or specify the jurisdictional minimum, dollar amount for damages. With respect to the claims filed in Europe, the substantial majority relate to occupational exposure claims brought by current and former employees of Federal-Mogul facilities in France and amounts paid out were not material. A small number of occupational exposure claims have also been asserted against Federal-Mogul entities in Italy and Spain. As major asbestos manufacturers and/or users continue to go out of business or file for bankruptcy, the Company may experience an increased number of these claims. The Company vigorously defends itself against these claims as part of its ordinary course of business. In future periods, the Company could be subject to cash costs or charges to earnings if any of these matters are resolved unfavorably to the Company. To date, with respect to claims that have proceeded sufficiently through the judicial process, the Company has regularly achieved favorable resolutions. Accordingly, the Company presently believes that these asbestos-related claims will not have a material adverse impact on the Company's annual consolidated financial position, results of operations or liquidity. In connection with Federal-Mogul’s emergence from bankruptcy in 2008, trusts were funded and established to assume liability for and resolve Federal-Mogul’s legacy asbestos liabilities in the United States and United Kingdom. Accordingly, those legacy liabilities in the United States and United Kingdom have had no ongoing impact on Federal-Mogul, Tenneco or their operations. The Company is also from time to time involved in other legal proceedings, claims or investigations. Some of these matters involve allegations of damages against the Company relating to environmental liabilities (including toxic tort, property damage and remediation), intellectual property matters (including patent, trademark and copyright infringement, and licensing disputes), personal injury claims (including injuries due to product failure, design or warning issues, and other product liability related matters), taxes, unclaimed property, employment matters, and commercial or contractual disputes, sometimes related to acquisitions or divestitures. Additionally, some of these matters involve allegations relating to legal compliance. While the Company vigorously defends itself against all of these legal proceedings, claims and investigations and take other actions to minimize its potential exposure, in future periods, the Company could be subject to cash costs or charges to earnings if any of these matters are resolved on unfavorable terms. Although the ultimate outcome of any legal matter cannot be predicted with certainty, based on current information, including the Company's assessment of the merits of the particular claim, except as described above under "Antitrust Investigations", the Company does expect the legal proceedings, claims or investigations currently pending against it will have any material adverse impact on its annual consolidated financial position, results of operations or liquidity. Asset Retirement Obligations As a result of the Acquisition, the Company acquired liabilities related to asset retirement obligations (ARO). The Company did not have ARO liabilities as of December 31, 2017. The Company’s primary ARO activities relate to the removal of hazardous building materials at its facilities. The Company records an ARO at fair value upon initial recognition when the amount is probable and can be reasonably estimated. ARO fair values are determined based on the Company’s determination of what a third party would charge to perform the remediation activities, generally using a present value technique. The Company maintains ARO liabilities in the consolidated balance sheets as follows: December 31 2018 (Millions) Accrued expenses and other current liabilities $ 3 Deferred credits and other liabilities 12 $ 15 The following is a rollforward of the Company’s ARO liability for the year ended December 31, 2018 (in millions): December 31 2018 (Millions) Balance as of December 31, 2017 $ — Acquisition of Federal-Mogul 12 Liabilities incurred 3 Liabilities settled/adjustments — Balance as of December 31, 2018 $ 15 Warranty Matters The Company provides warranties on some of its products. The warranty terms vary but range from one year up to limited lifetime warranties on some of its premium aftermarket products. Provisions for estimated expenses related to product warranty are made at the time products are sold or when specific warranty issues are identified with the Company's products. These estimates are established using historical information about the nature, frequency, and average cost of warranty claims. The Company believes the warranty reserve is appropriate; however, actual claims incurred could differ from the original estimates, requiring adjustments to the reserve. The reserve is included in both current and long-term liabilities on the consolidated balance sheets. Below is a table that shows the activity in the warranty accrual accounts: Year Ended December 31 2018 2017 2016 (Millions) Beginning balance $ 32 $ 27 $ 23 Acquisition of Federal-Mogul 17 — — Accruals related to product warranties 14 15 19 Reductions for payments made (18 ) (10 ) (15 ) Ending balance $ 45 $ 32 $ 27

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2018
Text Block [Abstract]
Share-Based Compensation	Share-Based Compensation The Company's current long-term incentive compensation plan, which was originally adopted in 2006 and amended in 2009, 2013 and 2018, is known as the Tenneco Inc. 2006 Long-Term Incentive Plan (2006 LTIP). The types of awards that may be granted under the 2006 LTIP are stock-options (both incentive and non-qualified stock options), stock appreciation rights (SARs), Full Value Awards (including bonus stock, stock units, restricted stock, restricted stock units (RSUs), deferred stock units, performance stock, and performance stock units (PSUs), and cash incentive awards (including long-term performance units (LTPUs) and cash settled RSUs). On September 12, 2018, the stockholders of the Company approved an amendment to the 2006 LTIP to increase the shares of common stock available thereunder to 3.0 million . Share-settled awards are settled through the issuance of new shares of Class A Common Stock. As of December 31, 2018 , up to 14.8 million shares of the Company's Class A Common Stock are authorized to be issued under its 2006 LTIP, of which approximately 4,034,413 shares remain authorized for granting under the plan. In 2018, the Company prospectively changed its vesting policy regarding retirement eligibility and now require a retirement eligible employee (or an employee who becomes retirement eligible) to provide at least one year of service from the grant date in order for the award to vest. If an employee becomes retirement eligible after the first year of vesting but before completion of the three -year term, the Company amortizes the expense for the share-based awards over a period starting at the grant date to the date an employee becomes retirement eligible. Prior to 2018, for employees eligible to retire at grant date, the Company immediately expensed the granted awards. Director restricted stock awards generally vest on the date of grant. Stock options, RSUs (both cash-settled and share-settled) and restricted stock are time-based service awards and generally vest according to a three -year graded vesting schedule. One-third of the award will vest on the first anniversary of the grant date, one-third of the award will vest on the second anniversary and one-third of the award will vest on the third anniversary. LTPU and PSU awards generally have a three -year performance period and cliff vest at the end of the period based upon achievement of performance and market targets established at the time of grant. Generally 50% of the award is based on performance targets and 50% is based on market targets. The market target for both LTPUs and PSU is Company total shareholder return (TSR) percentile ranking among peer companies with TSR defined as change in stock price plus dividends paid divided by beginning stock price. The LTPUs have two performance targets, Cumulative EBITDA and Cumulative free cash flow, which are defined in the award. The PSUs have one performance target, Cumulative economic value added, which is defined in the award. Director restricted stock, restricted stock and RSUs (cash-settled and share-settled) will participate in any dividends during the vesting period, which are subject to the same vesting terms of the award. The dividends are generally paid in cash on the settlement date of the award. The fair value of restricted stock and RSUs (cash-settled and share-settled) are determined using the average of the high and low trading price of our common stock on the date of measurement. The fair value of LTPU’s and PSUs are determined using the probability weighted factors for performance conditions combined with Monte Carlo simulation model for market conditions. The Monte Carlo model utilizes multiple input variables that determine the probability of satisfying the market condition stipulated in the award and calculated the fair value of the award. The starting stock price is based on the trailing 20-day closing stock price as of the beginning of the performance period and the closing stock price on the valuation date, as well as the respective stock prices for component companies. The risk-free rate is based on yields observed on the U.S. Treasury constant maturity notes with a term equal to the remaining term of the award being measured. Expected volatilities utilized in the model are based on historical volatility of the Company and the companies in the S&P 500 index using daily stock price returns prior to the valuation date, commensurate with the remaining performance period at the measurement date. The cross correlation among stock price returns of the Company and each of the component companies in the S&P 500 with the S&P 500 Index are calculated based on daily returns over the trailing period commensurate with the remainder of the performance period at the valuation date. For our restricted stock, share-settled RSUs and PSUs that have not yet vested, we estimate forfeitures by taking the average of the past actual forfeiture rate for these grants. Cash-Settled Awards Prior to 2018, the Company has granted RSUs and LTPUs to certain key employees that are payable in cash. These awards are classified as liabilities and are valued based on the fair value of the award at the grant date and are remeasured at each reporting date until settlement with compensation expense being recognized in proportion to the completed requisite period up until date of settlement. At December 31, 2018 , the LTPUs outstanding included a three -year grant for 2016-2018 payable in the first quarter of 2019, and a three -year grant for 2017-2019 payable in the first quarter of 2020. Total share-based compensation expense (net of taxes) for the cash-settled awards was a benefit of $1 million in 2018 , and an expense of $4 million and $10 million in 2017 and 2016 , respectively. Share-based compensation expense is included in selling, general and administrative expenses in the consolidated statements of income. As of December 31, 2018 , $2 million of total unrecognized compensation costs is expected to be recognized on the cash-settled awards over a weighted-average period of approximately 1 year. Share-Settled Awards The Company has granted restricted stock and stock options to its directors and certain key employees. In addition, beginning in 2018, the Company has granted RSUs and PSUs that are payable in common stock to certain key employees. These awards are settled in shares upon vesting with compensation expense being recognized based on the grant date fair value recognized ratably over the requisite service period if it is probable that the performance target related to the PSUs will be achieved and subsequently adjusted if the probability assessment changes. Total share-based compensation expense (net of taxes) for the share-settled awards for the years ended December 31, 2018 , 2017 , and 2016 was $11 million , $11 million and $9 million , respectively. Share-based compensation expense is included in selling, general and administrative expenses in the consolidated statements of income. Stock Options The Company's nonqualified stock options generally have seven -year terms. There have been no stock options granted since 2014 and all options are currently vested. As such, there was no unrecognized compensation cost related to the Company's stock option awards as of December 31, 2018 . The following table reflects the status and activity for all options to purchase common stock for the period indicated: Year Ended December 31, 2018 Shares Weighted Avg. Weighted Avg. Aggregate (Millions) Options outstanding, January 1, 2018 318,016 $ 46.18 2.3 $ 5 Granted — — Exercised (21,823 ) 29.79 Forfeited/expired (2,196 ) 55.50 Options outstanding, December 31, 2018 293,997 46.89 1.4 $ — Cash received from stock option exercises was $1 million in 2018 , $8 million in 2017 , and $16 million in 2016 . Stock options exercised generated a tax shortfall of less than $1 million in 2018 , and an excess tax benefit of $2 million in 2017 and $1 million in 2016 . As of December 31, 2018 , all outstanding options are exercisable. The total intrinsic value of options exercised during the years ended December 31, 2018 , 2017 , and 2016 was less than $1 million , $ 6 million and $ 11 million , respectively. As mentioned above, there have been no stock options granted since 2014. Accordingly, no options vested in 2018 . The total fair value of shares vested from options that were granted prior to 2015 was $2 million in 2017 and $4 million in 2016 . Restricted Stock, Share-Settled RSUs and PSUs The following table reflects the status for all nonvested restricted stock, share-settled RSUs and PSUs for the period indicated: Restricted Stock Share-Settled RSUs PSUs Shares Weighted Avg. Units Weighted Avg. Units Weighted Avg. Nonvested balance at January 1, 2018 410,251 $ 53.36 — $ — — $ — Granted 19,727 54.19 467,358 48.48 248,928 49.32 Vested (237,342 ) 51.17 (192 ) 55.04 — — Forfeited (14,086 ) 60.87 (26,763 ) 55.04 (21,879 ) 50.75 Nonvested balance at December 31, 2018 178,550 55.46 440,403 47.99 227,049 49.18 At December 31, 2018, the PSUs outstanding represent a three-year grant for 2018-2020 payable in the first quarter of 2021. The total fair value of restricted stock vested was $11 million in 2018 , $14 million in 2017 , and $9 million in 2016 . As of December 31, 2018 , approximately $25 million of total unrecognized compensation costs is expected to be recognized on the share-settled awards over a weighted-average period of approximately two years.

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Shareholders' Equity	Shareholders' Equity Common Stock Common Stock Outstanding As discussed in Note 3, Acquisitions and Divestitures , and pursuant to the Amended and Restated Certificate of Incorporation, Class B Common Stock was created, and the Company’s existing common stock was reclassified as Class A Common Stock. The Company has authorized 175,000,000 shares and 135,000,000 shares ( $0.01 par value) of Class A Common Stock at December 31, 2018 and 2017 . The Company has authorized 25,000,000 shares ( $0.01 par value) of Class B Common Stock at December 31, 2018 . Total common stock outstanding and changes in common stock issued are as follows: Class A Common Stock Class B Common Stock Year Ended December 31 Year Ended December 31 2018 2017 2016 2018 Shares issued, beginning balance 66,033,509 65,891,930 65,067,132 — Share issuances (1) 5,651,177 — — 23,793,669 Issuance pursuant to benefit plans 19,919 34,760 292,514 — Restricted stock forfeited and withheld for taxes (51,049 ) (126,682 ) — — Stock options exercised 21,823 233,501 532,284 — Shares issued, ending balance 71,675,379 66,033,509 65,891,930 23,793,669 Treasury stock 14,592,888 14,592,888 11,655,938 — Total shares outstanding 57,082,491 51,440,621 54,235,992 23,793,669 (1) Represents an aggregate of 29,444,846 shares of Common Stock delivered to AEP as the Stock Consideration related to Federal-Mogul Acquisition. See Note 3, Acquisitions and Divestitures for additional information. The rights of the Class A Common Stock and Class B Common Stock are the same, except with respect to voting and conversion. Holders of Class A Common Stock are entitled to one vote per share and holders of Class B Common Stock are not entitled to vote unless a proposed action would diminish their rights, powers or privileges, in which case such action must be unanimously approved by the holders of the Class B Common Stock. Holders of Class A Common Stock have no right to convert their shares into other securities. Each share of Class B Common Stock will automatically convert into a share of Class A Common Stock upon transfer, with limited exceptions. In addition, if the proposed spin-off of the Company’s aftermarket and ride performance business (the “Spin-Off”) does not occur by April 1, 2020, each holder of Class B Common Stock may convert its shares into an equal number of shares of Class A Common Stock, provided that the initial Class B holders would not own, in the aggregate, more than 15 percent of the Class A Common Stock following such conversion. Shareholder Agreement In connection with the closing of the Federal-Mogul acquisition, on October 1, 2018, the Company, AEP, IEP, and Icahn Enterprises Holdings L.P. (“IEH”) entered into a Shareholders Agreement (the “Shareholders Agreement”). Pursuant to the Shareholders Agreement, a designee of IEP will be nominated to the Company’s board of directors (the “Board”) at each annual meeting of stockholders until the earlier of the Spin-Off date and the date IEP and its affiliates own less than 10% of the outstanding Class A Common Stock and Class B Common Stock, measured as a single class (the “Outstanding Shares”). The Shareholders Agreement prohibits IEP and its affiliates from taking certain actions until the earlier of (i) April 1, 2020, if the Spin-Off has not occurred, and (ii) one year after the date on which IEP and its affiliates cease to own at least 5% of the Outstanding Shares. Prohibited actions include: (i) acquisitions of stock or other securities or any material assets of the Company or any subsidiaries (subject to some exceptions); (ii) participating in a proxy solicitation; (iii) announcing or proposing any extraordinary business combination transaction; and (iv) otherwise seeking to control or influence control of the management, the Board or the policies of the Company. Until the later of (i) the expiration of the standstill restrictions discussed above and (ii) the time when IEP and its affiliates cease to own at least 10% of the Outstanding Shares, IEP and its affiliates may not transfer any shares (a) to certain specified types of investors and (b) in an amount equal to 5% or more of the Class A Common Stock issued and outstanding (subject to certain carve outs for transfers to certain passive institutional investors). For so long as IEP and its affiliates own at least 10% of the Outstanding Shares, if the Company proposes to issue any equity securities (other than in an excluded issuance), IEP and its affiliates have certain preemptive rights. The Shareholders Agreement also includes registration rights for IEP. Share Repurchase Program During 2015, the Company's Board of Directors approved a share repurchase program, authorizing it to repurchase up to $550 million of its outstanding class A common stock over a three-year period ("2015 Program"). The Company purchased 4,182,613 shares in 2016 through open market purchases, which were funded through cash from operations, at a total cost of $225 million , at an average price of $53.89 per share. These repurchased shares are held as part of the Company's treasury stock. In February 2017, the Company's Board of Directors authorized the repurchase of up to $400 million of its outstanding common stock over the next three years ("2017 Program"). The 2017 Program included $112 million that remained authorized under the 2015 Program. The Company generally acquires the shares through open market or privately negotiated transactions, and has historically utilized cash from operations. The repurchase program does not obligate the Company to repurchase shares within any specific time or situations. The Company purchased 2,936,950 shares in 2017 through open market purchases at a total cost of $169 million , at an average price of $57.57 per share. These repurchased shares are held as part of the Company's treasury stock which increased to 14,592,888 at December 31, 2017 from 11,655,938 at December 31, 2016. As of December 31, 2018 , approximately $231 million remained authorized for share repurchases under the 2017 Program. In 2018, no shares were repurchased under the 2017 Program. No new share repurchase programs were authorized by the Board of Directors in 2018. Preferred Stock The Company had 50,000,000 shares of preferred stock ( $0.01 par value) authorized at both December 31, 2018 and 2017 . No shares of preferred stock were issued or outstanding at those dates.

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income (Loss) by Component	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income (Loss) by Component	Changes in Accumulated Other Comprehensive Income (Loss) by Component The following represents the Company’s changes in accumulated other comprehensive income (loss) by component for the years ended December 31, 2018 , 2017, and 2016: Year Ended December 31 2018 2017 2016 (In millions) Foreign currency translation adjustment: Balance at beginning of year $ (263 ) $ (367 ) $ (315 ) Other comprehensive income (loss) before reclassifications (134 ) 104 (49 ) Income tax provision (benefit) 2 — (3 ) Other comprehensive income (loss), net of tax (132 ) 104 (52 ) Balance at end of period (395 ) (263 ) (367 ) Pension and postretirement benefits: Balance at beginning of year (275 ) (292 ) (343 ) Other comprehensive income (loss) before reclassifications (47 ) 2 61 Reclassification to earnings 22 26 19 Other comprehensive income (loss) before tax (25 ) 28 80 Income tax provision (benefit) 3 (11 ) (29 ) Other comprehensive income (loss), net of tax (22 ) 17 51 Balance at end of period $ (297 ) $ (275 ) $ (292 ) Other comprehensive income (loss) attributable to noncontrolling interests, net of tax $ (2 ) $ 2 $ (4 )

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Share	Earnings per Share The Company computes basic earnings per share by dividing income available to common shareholders by the weighted average number of common shares outstanding. The computation of diluted earnings per share is similar to the computation of basic earnings per share, except that the Company adjusts the weighted average number of shares outstanding to include estimates of additional shares that would be issued if potentially dilutive common shares had been issued. In addition, the Company adjusts income available to common shareholders to include any changes in income or loss that would result from the assumed issuance of the dilutive common shares. Earnings per share of common stock outstanding were computed as follows: Year Ended December 31 2018 2017 2016 (Millions Except Share and Per Share Amounts) Net income attributable to Tenneco Inc. $ 55 $ 198 $ 347 Basic earnings per share — Average shares of common stock outstanding 58,625,087 52,796,184 55,939,135 Earnings per average share of common stock $ 0.93 $ 3.75 $ 6.20 Diluted earnings per share — Average shares of common stock outstanding 58,625,087 52,796,184 55,939,135 Effect of dilutive securities: Restricted stock and RSUs 93,546 111,062 175,513 Stock options 40,099 119,665 292,788 Average shares of common stock outstanding including dilutive securities 58,758,732 53,026,911 56,407,436 Earnings per average share of common stock $ 0.93 $ 3.73 $ 6.15 For the years ended December 31, 2018 , 2017 and 2016 , the weighted average number of anti-dilutive potential common shares excluded from the calculation above totaled 257,567 shares, 834 shares and 134,361 shares, respectively.

Segment and Geographic Area Inf

Segment and Geographic Area Information	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Segment and Geographic Area Information	Segment and Geographic Area Information In the first quarter of 2018, the Company's reportable segments were revised to reflect the Clean Air, Ride Performance, and Aftermarket businesses. Until the fourth quarter of 2018, the three reportable segments were also the Company's operating segments, and aligned with how the Chief Operating Decision Maker (“CODM”) allocated resources and assessed performance against key growth strategies. As discussed in Note 3, Acquisitions and Divestitures , the Company completed the Acquisition of Federal-Mogul on October 1, 2018 and its results are included in the Powertrain and Motorparts segments. As a result, it was determined the Company has five operating segments consisting of Clean Air, Ride Performance, Aftermarket, Powertrain, and Motorparts businesses. This structure is consistent with how the CODM allocates resources and assesses performance. With respect to the five segments: • The Clean Air segment designs, manufactures and distributes a variety of products and systems designed to reduce pollution and optimize engine performance, acoustic tuning and weight on a vehicle for OEMs. • The Ride Performance segment designs, manufactures and distributes a variety of products and systems designed to reduce and control excessive roll, pitch and bounce of a vehicle through the suspension system for OEM customers. • The Aftermarket segment designs, manufactures and distributes replacement products for the automotive parts industry including ride performance and clean air products. • The Powertrain segment focuses on original equipment powertrain products for automotive, heavy duty, and industrial applications. • The Motorparts segment sells and distributes a broad portfolio of products in the global aftermarket, while also serving OEMs with products including, braking, wipers, and a limited range of chassis components. As a result of the Acquisition, management changed its key performance measure of segment profitability. Management now uses EBITDA including noncontrolling interests as the key performance measure of segment profitability and uses the measure in its financial and operational decision making processes, for internal reporting, and for planning and forecasting purposes to effectively allocate resources. EBITDA including noncontrolling interests is defined as earnings before interest expense, income taxes, noncontrolling interests, and depreciation and amortization. Prior period operating segment results have been retrospectively recast to reflect the Company's current operating segments and change in key performance measure for segment profitability. Segment assets are not presented as it is not a measure reviewed by the CODM in allocating resources and assessing performance. EBITDA including noncontrolling interests should not be considered a substitute for results prepared in accordance with US GAAP and should not be considered an alternative to net income, which is the most directly comparable financial measure to EBITDA including noncontrolling interests that is in accordance with US GAAP. EBITDA including noncontrolling interests, as determined and measured by the Company, should not be compared to similarly titled measures reported by other companies. Segment results for 2018 , 2017 and 2016 are as follows: Reportable Segments Clean Air Ride Performance Aftermarket Powertrain Motorparts Total Other Reclass & Elims Total (Millions) At December 31, 2018, and for the Year Ended Revenues from external customers $ 6,707 $ 1,949 $ 1,221 $ 1,112 $ 774 $ 11,763 $ — $ — $ 11,763 Intersegment revenues — 22 — 40 10 72 — (72 ) — EBITDA including noncontrolling interests 597 66 169 92 (39 ) 885 (234 ) — 651 At December 31, 2017, and for the Year Ended Revenues from external customers $ 6,216 $ 1,807 $ 1,251 $ — $ — $ 9,274 $ — $ — $ 9,274 Intersegment revenues — 22 — — — 22 — (22 ) — EBITDA including noncontrolling interests 562 124 193 — — 879 (245 ) — 634 At December 31, 2016, and for the Year Ended Revenues from external customers $ 5,764 $ 1,593 $ 1,240 $ — $ — $ 8,597 $ — $ — $ 8,597 Intersegment revenues — 26 — — — 26 — (26 ) — EBITDA including noncontrolling interests 561 153 207 — — 921 (229 ) — 692 Segment EBITDA including noncontrolling interests and the reconciliation to earnings before interest expense, income taxes, and noncontrolling interests are as follow: Year Ended December 31 2018 2017 2016 (Millions) EBITDA including noncontrolling interests by Segments: Clean Air $ 597 $ 562 $ 561 Ride Performance 66 124 153 Aftermarket 169 193 207 Powertrain 92 — — Motorparts (39 ) — — Other (234 ) (245 ) (229 ) Total EBITDA including noncontrolling interests 651 634 692 Less: Depreciation and amortization (345 ) (226 ) (213 ) Earnings before interest expense, income taxes, and noncontrolling interests $ 306 $ 408 $ 479 Less: Interest expense 132 72 68 Less: Income tax expense (benefit) 63 71 (4 ) Net income $ 111 $ 265 $ 415 The following customers accounted for 10% or more of the Company's net sales in the last three years. The net sales to both customers were across all segments. Customer 2018 2017 2016 General Motors Company 12 % 14 % 17 % Ford Motor Company 12 % 13 % 13 % Revenues from external customers (b) Long-lived assets (c) Year Ended December 31 December 31 2018 2017 2016 2018 2017 (Millions) United States $ 4,488 $ 3,632 $ 3,512 $ 1,341 $ 655 China 1,553 1,283 1,186 687 280 Germany 1,212 798 764 543 144 Poland 731 488 385 319 219 United Kingdom 499 482 387 116 48 Mexico 543 416 352 239 75 India 316 216 159 167 46 Turkey 7 9 9 276 — Other Foreign (a) 2,414 1,950 1,843 687 298 Reclass & Elims — — — (107 ) — Consolidated $ 11,763 $ 9,274 $ 8,597 $ 4,268 $ 1,765 (a) Revenues from external customers and long-lived assets for individual foreign countries other than China, Germany, Poland, United Kingdom, Mexico, India, and Turkey are not material. (b) Revenues are attributed to countries based on location of the shipper. (c) Long-lived assets include all long-term assets except goodwill, intangibles and deferred tax assets. Disaggregation of revenue Original Equipment Value added: OE revenue is generated from providing original equipment manufacturers and servicers with products for automotive, heavy duty, and industrial applications. Supply relationships typically extend over the life of the related vehicle, subject to interim design and technical specification revisions, and do not require the customer to purchase a minimum quantity. Substrate/Pass through sales: Generally, in connection with the sale of exhaust systems to certain OE manufacturers, the Company purchases catalytic converters and diesel particulate filters or components thereof including precious metals (“substrates”) on behalf of its customers which are used in the assembled system. These substrates are included in inventory and are “passed through” to the customer at cost, plus a small margin. Since the Company takes title to the substrate inventory and has responsibility for both the delivery and quality of the finished product including the substrates, the revenues and related expenses are recorded at gross amounts. Revenues recognized for substrate sales were $2,500 million , $2,187 million , and $2,028 million for the years ended December 31, 2018 , 2017 and 2016 . Aftermarket Aftermarket revenue is generated from providing products for the global vehicle aftermarket to a wide range of warehouse distributors, retail parts stores, and mass merchants that distribute these products to customers ranging from professional service providers to “do-it-yourself” consumers. Revenue from contracts with customers is disaggregated by product lines, as it depicts the nature and amount of the Company’s revenue that is aligned with the Company's key growth strategies. In the following table, revenue is disaggregated accordingly: Reportable Segments By Customer Type Clean Air Ride Performance Aftermarket Powertrain Motorparts Total (Millions) Year Ended December 31, 2018 OE - Substrate $ 2,500 $ — $ — $ — $ — $ 2,500 OE - Value add 4,207 1,949 — 1,112 — 7,268 Aftermarket — — 1,221 — 774 1,995 Total $ 6,707 $ 1,949 $ 1,221 $ 1,112 $ 774 $ 11,763 Year Ended December 31, 2017 OE - Substrate $ 2,187 $ — $ — $ — $ — $ 2,187 OE - Value add 4,029 1,807 — — — 5,836 Aftermarket — — 1,251 — — 1,251 Total $ 6,216 $ 1,807 $ 1,251 $ — $ — $ 9,274 Year Ended December 31, 2016 OE - Substrate $ 2,028 $ — $ — $ — $ — $ 2,028 OE - Value add 3,736 1,593 — — — 5,329 Aftermarket — — 1,240 — — 1,240 Total $ 5,764 $ 1,593 $ 1,240 $ — $ — $ 8,597 Reportable Segments By Geography Clean Air Ride Performance Aftermarket Powertrain Motorparts Total (Millions) Year Ended December 31, 2018 North America $ 2,981 $ 721 $ 758 $ 386 $ 408 $ 5,254 EMEA 2,415 801 399 498 290 4,403 ROW 1,311 427 64 228 76 2,106 Total $ 6,707 $ 1,949 $ 1,221 $ 1,112 $ 774 $ 11,763 Year Ended December 31, 2017 North America $ 2,866 $ 674 $ 786 $ — $ — $ 4,326 EMEA 2,143 736 404 — — 3,283 ROW 1,207 397 61 — — 1,665 Total $ 6,216 $ 1,807 $ 1,251 $ — $ — $ 9,274 Year Ended December 31, 2016 North America $ 2,767 $ 652 $ 818 $ — $ — $ 4,237 EMEA 1,872 604 370 — — 2,846 ROW 1,125 337 52 — — 1,514 Total $ 5,764 $ 1,593 $ 1,240 $ — $ — $ 8,597 The following table shows the asset expenditure information by reportable segments: Year Ended December 31, 2018 Clean Air Ride Performance Aftermarket Powertrain Motorparts Other unallocated assets Total (Millions) Prior year payable on assets $ 33 $ 22 $ 4 $ — $ — $ — $ 59 Asset additions 202 121 38 81 43 56 541 Less: Current year payable on assets (38 ) (23 ) (7 ) (23 ) (2 ) — (93 ) Cash payments for property, plant, and equipment $ 197 $ 120 $ 35 $ 58 $ 41 $ 56 $ 507 Year Ended December 31, 2017 Clean Air Ride Performance Aftermarket Powertrain Motorparts Other unallocated assets Total (Millions) Prior year payable on assets $ 43 $ 19 $ 5 $ — $ — $ 1 $ 68 Asset additions 212 145 27 — — 26 410 Less: Current year payable on assets (33 ) (22 ) (4 ) — — — (59 ) Cash payments for property, plant, and equipment $ 222 $ 142 $ 28 $ — $ — $ 27 $ 419 Year Ended December 31, 2016 Clean Air Ride Performance Aftermarket Powertrain Motorparts Other unallocated assets Total (Millions) Prior year payable on assets $ 35 $ 11 $ 4 $ — $ — $ — $ 50 Asset additions 217 96 26 — — 24 363 Less: Current year payable on assets (43 ) (19 ) (5 ) — — (1 ) (68 ) Cash payments for property, plant, and equipment $ 209 $ 88 $ 25 $ — $ — $ 23 $ 345 The Other unallocated assets are comprised of software additions not included in segment information.

Related Party Transactions Rela

Related Party Transactions Related Party Transactions	12 Months Ended
	Dec. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions The parties presented in the tables below, other than Montagewerk Abgastechnik Emden GmbH, became related parties of the Company as a result of the Acquisition discussed in Note 3, Acquisitions and Divestitures , with net sales and purchases presented being reflective of activity post acquisition date. Amounts presented as Icahn Automotive Group LLC represent the Company's activity with Auto Plus and Pep Boys. See Note 8, Investment in Nonconsolidated Affiliates , for further information for companies within the tables below that represent equity method investments. The following table is a summary of net sales to the Company's related parties for the year ended December 31, 2018: Year Ended December 31 2018 Net Sales: (Millions) Icahn Automotive Group LLC $ 52 Anqing TP Powder Metallurgy Company Limited $ 1 Dongsuh Federal-Mogul Industrial Co., Ltd. $ 1 Federal-Mogul Powertrain Otomotiv A.S. $ 11 Federal-Mogul TP Liners, Inc. $ 2 Montagewerk Abgastechnik Emden GmbH $ 1 The following table is a summary of purchases made by the Company from its related parties for the year ended December 31, 2018: Year Ended December 31 2018 Purchases: (Millions) Anqing TP Goetze Piston Ring Company Limited $ 16 Anqing TP Powder Metallurgy Company Limited $ 1 Dongsuh Federal-Mogul Industrial Co., Ltd. $ 2 Federal-Mogul Powertrain Otomotiv A.S. $ 53 Federal-Mogul TP Liner Europe Otomotiv Ltd. Sti. $ 13 Federal-Mogul TP Liners, Inc. $ 14 The following table is a summary of royalty and other income from the Company's related parties for the year ended December 31, 2018: Year Ended December 31 2018 Royalty and Other Income: (Millions) Icahn Automotive Group LLC $ 1 Federal-Mogul Powertrain Otomotiv A.S. $ 4 Federal-Mogul TP Liners, Inc. $ 4 The following table is a summary of amounts due to and from the Company's related parties as of December 31, 2018: December 31 2018 Receivables: (Millions) Icahn Automotive Group LLC $ 60 Anqing TP Goetze Piston Ring Company Limited $ 1 Anqing TP Powder Metallurgy Company Limited $ 1 Dongsuh Federal-Mogul Industrial Co., Ltd. $ 1 Federal-Mogul Powertrain Otomotiv A.S. $ 9 Federal-Mogul TP Liners, Inc. $ 2 Payables and accruals: Icahn Automotive Group LLC $ 12 Anqing TP Goetze Piston Ring Company Limited $ 22 Anqing TP Powder Metallurgy Company Limited $ 1 Dongsuh Federal-Mogul Industrial Co., Ltd. $ 2 Federal-Mogul Powertrain Otomotiv A.S. $ 16 Federal-Mogul TP Liner Europe Otomotiv Ltd. Sti. $ 1 Federal-Mogul TP Liners, Inc. $ 7

Quarterly Financial Data (Unaud

Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data (Unaudited)	Quarterly Financial Data (Unaudited) The following tables present the unaudited quarterly results of operations for the eight quarters ended December 31, 2018 . This quarterly information has been prepared on the same basis as the consolidated financial statements and, in the opinion of management, reflects all adjustments necessary for the fair statement of the information for the periods presented. This data should be read in conjunction with the consolidated financial statements and related disclosures. Operating results for any quarter apply to that quarter only and are not necessarily indicative of results for any future period. The amounts below reflect the revisions as discussed in Note 2, Summary of Significant Accounting Policies and the 2018 amounts will be revised for interim periods in future filings and were not material to the previously issued financial statements. Net sales and operating revenues Cost of sales (exclusive of depreciation and amortization) As Reported Revision As Revised As Reported Revision As Revised Quarter (Millions) (Millions) 2018 1st $ 2,574 $ 7 $ 2,581 $ 2,198 $ 4 $ 2,202 2nd 2,537 (4 ) 2,533 2,159 (2 ) 2,157 3rd 2,372 (1 ) 2,371 2,014 — 2,014 4th 4,278 3,698 Full Year $ 11,763 $ 10,071 2017 1st $ 2,292 $ 6 $ 2,298 $ 1,929 $ 3 $ 1,932 2nd 2,317 (3 ) 2,314 1,949 — 1,949 3rd 2,274 (1 ) 2,273 1,911 1 1,912 4th 2,391 (2 ) 2,389 2,020 (1 ) 2,019 Full Year $ 9,274 $ — $ 9,274 $ 7,809 $ 3 $ 7,812 Earnings before interest expense, income taxes, and noncontrolling interests Net Income As Reported Reclass As Reclassified Revision As Revised As Reported Revision As Revised Quarter (Millions) (Millions) 2018 1st $ 117 $ — $ 117 $ 2 $ 119 $ 58 $ 2 $ 60 2nd 113 — 113 (4 ) 109 50 (3 ) 47 3rd 104 — 104 5 109 54 3 57 4th (31 ) (109 ) Full Year $ 306 $ 55 2017 1st $ 121 — $ 121 $ 1 $ 122 $ 59 $ 2 $ 61 2nd 27 (1 ) 26 (3 ) 23 (3 ) (2 ) (5 ) 3rd 134 — 134 (3 ) 131 83 (3 ) 80 4th 135 — 135 (3 ) 132 68 (6 ) 62 Full Year $ 417 $ (1 ) $ 416 $ (8 ) $ 408 $ 207 $ (9 ) $ 198 Basic earnings (loss) per share of common stock (1) Diluted earnings (loss) per share of common stock (1) As Reported Revision As Revised As Reported Revision As Revised Quarter (Millions) (Millions) 2018 1st $ 1.13 $ 0.04 $ 1.17 $ 1.13 $ 0.04 $ 1.17 2nd 0.98 (0.06 ) 0.92 0.98 (0.06 ) 0.92 3rd 1.05 0.06 1.11 1.05 0.06 1.11 4th (1.35 ) (1.35 ) Full Year $ 0.93 $ 0.93 2017 1st $ 1.10 $ 0.03 $ 1.13 $ 1.09 $ 0.03 $ 1.12 2nd (0.05 ) (0.04 ) (0.09 ) (0.05 ) (0.04 ) (0.09 ) 3rd 1.57 (0.04 ) 1.53 1.57 (0.04 ) 1.53 4th 1.33 (0.14 ) 1.19 1.33 (0.14 ) 1.19 Full Year $ 3.93 $ (0.18 ) $ 3.75 $ 3.91 $ (0.18 ) $ 3.73 (1) The sum of the quarters may not equal the total of the respective year’s earnings per share on either a basic or diluted basis due to changes in the weighted average shares outstanding throughout the year.

Supplemental Guarantor Condense

Supplemental Guarantor Condensed Consolidating Financial Statements	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Supplemental Guarantor Condensed Consolidating Financial Statements	Supplemental Guarantor Condensed Consolidating Financial Statements Basis of Presentation Substantially all of the Company's existing and future material domestic 100% owned subsidiaries (which are referred to as the Guarantor Subsidiaries) fully and unconditionally guarantee its senior notes on a joint and several basis. However, a subsidiary’s guarantee may be released in certain customary circumstances such as a sale of the subsidiary or all or substantially all of its assets in accordance with the indenture applicable to the notes. The Guarantor Subsidiaries are combined in the presentation below. These consolidating financial statements are presented on the equity method. Under this method, the Company's investments are recorded at cost and adjusted for its ownership share of a subsidiary’s cumulative results of operations, capital contributions and distributions, and other equity changes. You should read the condensed consolidating financial information of the Guarantor Subsidiaries in connection with the Company's condensed consolidated financial statements and related notes of which this note is an integral part. These consolidating financial statements have been updated subsequent to the filing of the Form 10-K for the year ended December 31, 2017 to reflect the adoption of certain new accounting standards in the first quarter of 2018. The accompanying supplemental guarantor consolidating financial statements have been updated to reflect the revision as described in Note 2, Summary of Significant Accounting Policies . As discussed in Note 3, Acquisitions and Divestitures , the allocation of the purchase price to the assets acquired and liabilities assumed, including the entities to which it is allocated, is preliminary and subject to change during the measurement period. Distributions There are no significant restrictions on the ability of the Guarantor Subsidiaries to make distributions to the Company. STATEMENT OF COMPREHENSIVE INCOME (LOSS) Year Ended December 31, 2018 Guarantor Nonguarantor Tenneco Inc. Reclass Consolidated (Millions) Revenues Net sales and operating revenues: External $ 4,678 $ 7,085 $ — $ — $ 11,763 Affiliated companies 606 725 — (1,331 ) — 5,284 7,810 — (1,331 ) 11,763 Costs and expenses Cost of sales (exclusive of depreciation and amortization) 4,570 6,845 (13 ) (1,331 ) 10,071 Selling, general, and administrative 384 377 33 — 794 Depreciation and amortization 153 192 — — 345 Engineering, research, and development 95 109 — — 204 Goodwill impairment charge 3 — — — 3 5,205 7,523 20 (1,331 ) 11,417 Equity earnings of nonconsolidated affiliates — — — — — Other expense (income) Loss on sale of receivables 8 8 — — 16 Non-service postretirement benefit costs 13 9 (2 ) — 20 Loss on extinguishment of debt — — 10 — 10 Equity in (earnings) losses of nonconsolidated affiliates, net of tax — (18 ) — — (18 ) Other (income) expense, net 29 (36 ) 1 18 12 50 (37 ) 9 18 40 Earnings (loss) before interest expense, income taxes and noncontrolling interests 29 324 (29 ) (18 ) 306 Interest expense: External, net of interest capitalized 26 12 94 — 132 Affiliated companies, net of interest income (14 ) 7 7 — — Earnings (loss) before income taxes and noncontrolling interests 17 305 (130 ) (18 ) 174 Income tax expense (benefit) (30 ) 93 — — 63 Equity in net income from affiliated companies 135 — 184 (319 ) — Net income 182 212 54 (337 ) 111 Less: Net income attributable to noncontrolling interests — 56 — — 56 Net income attributable to Tenneco Inc. $ 182 $ 156 $ 54 $ (337 ) $ 55 Comprehensive income (loss) attributable to Tenneco Inc. $ 159 $ 24 $ (31 ) $ (251 ) $ (99 ) STATEMENT OF COMPREHENSIVE INCOME (LOSS) Year Ended December 31, 2017 Guarantor Nonguarantor Tenneco Inc. Reclass Consolidated (Millions) Revenues Net sales and operating revenues: External $ 3,889 $ 5,385 $ — $ — $ 9,274 Affiliated companies 540 640 — (1,180 ) — 4,429 6,025 — (1,180 ) 9,274 Costs and expenses Cost of sales (exclusive of depreciation and amortization) 3,771 5,221 — (1,180 ) 7,812 Selling, general, and administrative 352 286 — — 638 Depreciation and amortization 90 136 — — 226 Engineering, research, and development 77 81 — — 158 Goodwill impairment charge — 11 — — 11 4,290 5,735 — (1,180 ) 8,845 Other expense (income) Loss on sale of receivables 2 3 — — 5 Non-service postretirement benefit costs 18 (2 ) — — 16 Loss on extinguishment of debt 1 — — — 1 Equity in losses of nonconsolidated affiliates, net of tax — 1 — — 1 Other (income) expense, net (2 ) (53 ) — 53 (2 ) 19 (51 ) — 53 21 Earnings (loss) before interest expense, income taxes, noncontrolling interests and equity in net income from affiliated companies 120 341 — (53 ) 408 Interest expense: External, net of interest capitalized 18 5 49 — 72 Affiliated companies, net of interest income (15 ) 6 9 — — Earnings (loss) before income taxes, noncontrolling interests and equity in net income from affiliated companies 117 330 (58 ) (53 ) 336 Income tax (benefit) expense (10 ) 81 — — 71 Equity in net income from affiliated companies 149 — 265 (414 ) — Net income 276 249 207 (467 ) 265 Less: Net income attributable to noncontrolling interests — 67 — — 67 Net income attributable to Tenneco Inc. $ 276 $ 182 $ 207 $ (467 ) $ 198 Comprehensive income attributable to Tenneco Inc. $ 282 $ 173 $ 331 $ (467 ) $ 319 STATEMENT OF COMPREHENSIVE INCOME (LOSS) Year Ended December 31, 2016 Guarantor Nonguarantor Tenneco Inc. Reclass Consolidated (Millions) Revenues Net sales and operating revenues: External $ 3,863 $ 4,734 $ — $ — $ 8,597 Affiliated companies 526 747 — (1,273 ) — 4,389 5,481 — (1,273 ) 8,597 Costs and expenses Cost of sales (exclusive of depreciation and amortization) 3,724 4,675 — (1,273 ) 7,126 Selling, general, and administrative 235 278 1 — 514 Depreciation and amortization 87 126 — — 213 Engineering, research, and development 76 77 — — 153 4,122 5,156 1 (1,273 ) 8,006 Other expense (income) Loss on sale of receivables 2 3 — — 5 Non-service postretirement benefit costs 83 1 — — 84 Loss on extinguishment of debt 24 — — — 24 Other (income) expense, net 8 (24 ) — 15 (1 ) 117 (20 ) — 15 112 Earnings (loss) before interest expense, income taxes, noncontrolling interests and equity in net income from affiliated companies 150 345 (1 ) (15 ) 479 Interest expense: External, net of interest capitalized (26 ) 4 90 — 68 Affiliated companies, net of interest income (12 ) 7 5 — — Earnings (loss) before income taxes, noncontrolling interests and equity in net income from affiliated companies 188 334 (96 ) (15 ) 411 Income tax (income) expense (101 ) 97 — — (4 ) Equity in net income from affiliated companies 166 — 452 (618 ) — Net income 455 237 356 (633 ) 415 Less: Net income attributable to noncontrolling interests — 68 — — 68 Net income attributable to Tenneco Inc. $ 455 $ 169 $ 356 $ (633 ) $ 347 Comprehensive income attributable to Tenneco Inc. $ 464 $ 159 $ 356 $ (633 ) $ 346 BALANCE SHEETS December 31, 2018 Guarantor Nonguarantor Tenneco Inc. Reclass Consolidated (Millions) ASSETS Current assets: Cash and cash equivalents $ 329 $ 364 $ 4 $ — $ 697 Restricted cash 5 — — 5 Receivables, net 943 1,629 — — 2,572 Inventories, net 958 1,287 — — 2,245 Prepayments and other current assets 254 311 25 — 590 Total current assets 2,484 3,596 29 — 6,109 Property, plant and equipment, net 1,131 2,361 9 — 3,501 Investment in affiliated companies 1,421 — 4,856 (6,277 ) — Long-term receivables, net 9 1 — — 10 Goodwill 263 383 223 — 869 Intangibles, net 1,007 510 2 — 1,519 Investments in nonconsolidated affiliates 43 501 — — 544 Deferred income taxes 255 200 12 — 467 Other assets 48 180 — (15 ) 213 Total assets $ 6,661 $ 7,732 $ 5,131 $ (6,292 ) $ 13,232 LIABILITIES AND SHAREHOLDERS’ EQUITY Current liabilities: Short-term debt, including current maturities of long-term debt $ 1 $ 152 $ — $ — $ 153 Accounts payable 858 1,894 7 — 2,759 Accrued compensation and employee benefits 88 255 — — 343 Accrued income taxes — 52 27 (15 ) 64 Accrued expenses and other current liabilities 436 488 77 — 1,001 Total current liabilities 1,383 2,841 111 (15 ) 4,320 Long-term debt 3 32 5,305 — 5,340 Intercompany due to (due from) 2,726 (215 ) (2,511 ) — — Deferred income taxes — 88 — — 88 Pension, postretirement benefits and other liabilities 225 705 500 — 1,430 Commitments and contingencies Total liabilities 4,337 3,451 3,405 (15 ) 11,178 Redeemable noncontrolling interests — 138 — — 138 Tenneco Inc. shareholders’ equity 2,324 3,953 1,726 (6,277 ) 1,726 Noncontrolling interests — 190 — — 190 Total equity 2,324 4,143 1,726 (6,277 ) 1,916 Total liabilities, redeemable noncontrolling interests and equity $ 6,661 $ 7,732 $ 5,131 $ (6,292 ) $ 13,232 BALANCE SHEETS December 31, 2017 Guarantor Nonguarantor Tenneco Inc. Reclass Consolidated (Millions) ASSETS Current assets: Cash and cash equivalents $ 7 $ 308 $ — $ — $ 315 Restricted cash — 3 — — 3 Receivables, net 208 1,113 — — 1,321 Inventories, net 359 461 — — 820 Prepayments and other current assets 99 189 — — 288 Total current assets 673 2,074 — — 2,747 Property, plant and equipment, net 594 1,097 — — 1,691 Investment in affiliated companies 1,385 — 1,198 (2,583 ) — Long-term receivables, net 8 1 — — 9 Goodwill 22 27 — — 49 Intangibles, net 5 17 — — 22 Investments in nonconsolidated affiliates 1 1 — — 2 Deferred income taxes 169 44 — — 213 Other assets 12 51 — — 63 Total assets $ 2,869 $ 3,312 $ 1,198 $ (2,583 ) $ 4,796 LIABILITIES AND SHAREHOLDERS' EQUITY Current liabilities: Short-term debt, including current maturities of long-term debt $ — $ 103 $ — $ — $ 103 Accounts payable 496 1,086 — — 1,582 Accrued compensation and employee benefits 24 117 — — 141 Accrued income taxes 2 25 — — 27 Accrued expenses and other current liabilities 208 204 12 — 424 Total current liabilities 730 1,535 12 — 2,277 Long-term debt 632 12 714 — 1,358 Intercompany due to (due from) 561 (397 ) (164 ) — — Deferred income taxes — 11 — — 11 Postretirement benefits and other liabilities 299 127 — — 426 Commitments and contingencies Total liabilities 2,222 1,288 562 — 4,072 Redeemable noncontrolling interests — 42 — — 42 Tenneco Inc. shareholders’ equity 647 1,936 636 (2,583 ) 636 Noncontrolling interests — 46 — — 46 Total equity 647 1,982 636 (2,583 ) 682 Total liabilities, redeemable noncontrolling interests and equity $ 2,869 $ 3,312 $ 1,198 $ (2,583 ) $ 4,796 STATEMENT OF CASH FLOWS Year Ended December 31, 2018 Guarantor Nonguarantor Tenneco Inc. Reclass Consolidated (Millions) Operating Activities Net cash provided by (used in) operating activities $ 248 $ 246 $ (36 ) $ (19 ) $ 439 Investing Activities Federal-Mogul acquisition 151 124 (2,469 ) — — (2,194 ) Proceeds from sale of assets 2 7 — — 9 Cash payments for property, plant and equipment (196 ) (311 ) — — (507 ) Proceeds from deferred purchase price of factored receivables — 174 — — 174 Other 1 3 — — 4 Net cash used in investing activities (42 ) (3 ) (2,469 ) — (2,514 ) Financing Activities Cash dividends — — (59 ) — (59 ) Repayment of term loans and notes (391 ) (62 ) — — (453 ) Proceeds from term loans and notes — 26 3,400 — 3,426 Debt issuance cost on long-term debt (15 ) — (80 ) — (95 ) Tax impact from stock-based compensation — — — — — Issuance (repurchase) of common shares — — (1 ) — (1 ) Decrease in bank overdrafts — (5 ) — — (5 ) Borrowings on revolving lines of credit 4,411 114 624 — 5,149 Payments on revolving lines of credit (4,654 ) (127 ) (624 ) — (5,405 ) Net increase (decrease) in short-term borrowings secured by accounts receivable — (30 ) — — (30 ) Intercompany dividends and net (decrease) increase in intercompany obligations 765 (33 ) (751 ) 19 — Distribution to noncontrolling interests partners — (51 ) — — (51 ) Net cash (used in) provided by financing activities 116 (168 ) 2,509 19 2,476 Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash — (17 ) — — (17 ) Increase in cash, cash equivalents and restricted cash 322 58 4 — 384 Cash, cash equivalents and restricted cash, January 1 7 311 — — 318 Cash, cash equivalents and restricted cash, December 31 $ 329 $ 369 $ 4 $ — $ 702 STATEMENT OF CASH FLOWS Year Ended December 31, 2017 Guarantor Nonguarantor Tenneco Inc. Reclass Consolidated (Millions) Operating Activities Net cash provided by (used in) operating activities $ 284 $ 290 $ (4 ) $ (53 ) $ 517 Investing Activities Proceeds from sale of assets 3 5 — — 8 Proceeds from sale of equity interest — 9 9 Cash payments for property, plant and equipment (164 ) (255 ) — — (419 ) Proceeds from deferred purchase price of factored receivables — 112 — — 112 Other (4 ) (6 ) — — (10 ) Net cash used in investing activities (165 ) (135 ) — — (300 ) Financing Activities Cash dividends — — (53 ) — (53 ) Payments of term loans and notes (10 ) (20 ) (6 ) — (36 ) Proceeds from term loans and notes 136 24 — — 160 Debt issuance cost on long-term debt (8 ) — — — (8 ) Purchase of common stock under the share repurchase program — — (169 ) — (169 ) Issuance of common shares — — (1 ) — (1 ) Decrease in bank overdrafts — (7 ) — — (7 ) Borrowings on revolving lines of credits 3,956 48 2,660 — 6,664 Payments on revolving lines of credits (3,710 ) (49 ) (2,978 ) (6,737 ) Intercompany dividends and net (decrease) increase in intercompany obligations (485 ) (119 ) 551 53 — Distribution to noncontrolling interests partners — (64 ) — — (64 ) Net cash (used in) provided by financing activities (121 ) (187 ) 4 53 (251 ) Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash — 3 — — 3 Decrease in cash, cash equivalents and restricted cash (2 ) (29 ) — — (31 ) Cash, cash equivalents and restricted cash, January 1 9 340 — — 349 Cash, cash equivalents and restricted cash, December 31 $ 7 $ 311 $ — $ — $ 318 STATEMENT OF CASH FLOWS Year Ended December 31, 2016 Guarantor Nonguarantor Tenneco Inc. Reclass Consolidated (Millions) Operating Activities Net cash provided by (used in) operating activities $ 176 $ 190 $ 23 $ (15 ) $ 374 Investing Activities Proceeds from sale of assets — 6 — — 6 Cash payments for property, plant and equipment (130 ) (215 ) — — (345 ) Proceeds from deferred purchase price of factored receivables — 110 110 Net cash used in investing activities (130 ) (99 ) — — (229 ) Financing Activities Repayments of term loans and notes — (29 ) (516 ) — (545 ) Proceeds from term loans and notes — 29 500 — 529 Debt issuance cost on long-term debt — — (9 ) — (9 ) Purchase of common stock under the share repurchase program — — (225 ) — (225 ) Issuance of common shares — — 13 — 13 Increase in bank overdrafts — 10 — — 10 Borrowings on revolving lines of credit — 101 5,316 — 5,417 Payments on revolving lines of credit — (103 ) (5,118 ) — (5,221 ) Intercompany dividends and net (decrease) increase in intercompany obligations (39 ) 8 16 15 — Distribution to noncontrolling interests partners — (55 ) — — (55 ) Net cash used in financing activities (39 ) (39 ) (23 ) 15 (86 ) Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash — 2 — — 2 Increase in cash, cash equivalents and restricted cash 7 54 — — 61 Cash, cash equivalents and restricted cash, January 1 2 286 — — 288 Cash, cash equivalents and restricted cash, December 31 $ 9 $ 340 $ — $ — $ 349

Subsequent Events Subsequent Ev

Subsequent Events Subsequent Events	12 Months Ended
	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Dividend On February 6, 2019, the Company's Board of Directors declared a cash dividend of $0.25 per share on its Class A Common Stock and Class B Common Stock, payable on March 21, 2019 to shareholders of record as of March 5, 2019. Öhlins Racing A.B Acquisition On January 10, 2019 , the Company closed on its acquisition of Öhlins Racing A.B. (“Öhlins”), a Swedish technology company that develops premium suspension systems and components for the automotive and motorsport industries. The purchase price was approximately $160 million . The agreement to acquire Öhlins was signed and announced on November 15, 2018. Given the timing of the acquisition, the Company is in the process of completing the preliminary purchase accounting. (The preceding notes are an integral part of the foregoing consolidated financial statements.)

SCHEDULE II _ VALUATION AND QUA

SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS	12 Months Ended
	Dec. 31, 2018
Valuation and Qualifying Accounts [Abstract]
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS	SCHEDULE II TENNECO INC. AND CONSOLIDATED SUBSIDIARIES SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS Additions Description Balance Charged Charged Deductions Balance (Millions) Allowance for Doubtful Accounts and Notes Receivable Deducted from Assets to Which it Applies: Year Ended December 31, 2018 $ 16 5 — 4 $ 17 Year Ended December 31, 2017 $ 16 1 — 1 $ 16 Year Ended December 31, 2016 $ 16 1 — 1 $ 16 Description Balance Provision Charged (Credited) to Expense Allowance Changes Other Additions (Deductions) (a) Balance (Millions) Deferred Tax Assets- Valuation Allowance: Year Ended December 31, 2018 $ 163 — — 351 $ 514 Year Ended December 31, 2017 $ 145 (1 ) — 19 $ 163 Year Ended December 31, 2016 $ 127 18 — — $ 145 (a) This amount primarily relates to the acquisition of Federal-Mogul in 2018 of $368 million , and changes in foreign currency exchange rates, primarily the euro, in 2017 and 2018.

Summary of Accounting Policies

Summary of Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Reclassifications	Reclassifications: Certain amounts in the prior years have been aggregated or disaggregated to conform to current year presentation. These reclassifications have no effect on previously reported earnings before income taxes and noncontrolling interests or net income, other comprehensive income (loss), current or total assets, current or total liabilities, and the cash provided (used) by operating, investing or financing activities within the consolidated statements of cash flows.
Basis of Presentation	Basis of Presentation The consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States ("U.S. GAAP").
Principles of Consolidation	Principles of Consolidation: The Company consolidates into its financial statements the accounts of the Company, all wholly owned subsidiaries, and any partially owned subsidiary it has the ability to control. Control generally equates to ownership percentage, whereby investments more that 50% owned are consolidated, investments in affiliates of 50% or less but greater than 20% are accounted for using the equity method, and investments in affiliates of 20% or less are accounted for using the cost method. See Note 8, Investment in Nonconsolidated Affiliates . The Company does not consolidate any entity for which it has a variable interest based solely on the power to direct the activities and significant participation in the entity's expected results that would not otherwise be consolidated based on control through voting interests. Further, its affiliates are businesses established and maintained in connection with its operating strategy and are not special purpose entities. All intercompany transactions and balances have been eliminated.
Use of Estimates	Use of Estimates: The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported therein. Due to the inherent uncertainty involved in making estimates, actual results reported in future periods may be based upon amounts that differ from these estimates.
Cash and Cash Equivalents	Cash and Cash Equivalents: The Company considers all highly liquid investments with maturities of 90 days or less from the date of purchase to be cash equivalents. The carrying value of cash and cash equivalents approximate fair value.
Restricted Cash	Restricted Cash: The Company is required to provide cash collateral in connection with certain contractual arrangements and statutory requirements. The Company has $5 million and $3 million of restricted cash at December 31, 2018 and 2017 in support of these arrangements and requirements.
Notes and Accounts Receivable	Notes and Accounts Receivable: Notes and accounts receivable are stated at net realizable value, which approximates fair value. Receivables are reduced by an allowance for amounts that may become uncollectible in the future. The allowance is an estimate based on historical collection experience, current economic and market conditions, and a review of the current status of each customer's trade accounts or notes receivable. A receivable is past due if payments have not been received within the agreed-upon invoice terms. Account balances are charged-off against the allowance when management determines the receivable will not be recovered. The allowance for doubtful accounts on short-term and long-term accounts receivable was $17 million and $16 million at December 31, 2018 and 2017 . The allowance for doubtful accounts on short-term and long-term notes receivable was zero at both December 31, 2018 and 2017 .
Inventories	Inventories: Inventories are stated at the lower of cost or net realizable value using the first-in, first-out (“FIFO”) or average cost methods. Work in process includes purchased parts such as substrates coated with precious metals. Cost of inventory includes direct materials, labor, and applicable manufacturing overhead costs. The value of inventories are reduced for excess and obsolescence based on management's review of on-hand inventories compared to historical and estimated future sales and usage. Inventory held at consignment locations is included in finished goods inventory as the Company retains full title and rights to the products.
Redeemable Noncontrolling Interests	Redeemable Noncontrolling Interests: The Company has noncontrolling interests with redemption features. These redemption features could require the Company to make an offer to purchase the noncontrolling interests at fair value in the event of a change in control of Tenneco Inc. or certain of its subsidiaries. As a result of the Acquisition, the Company acquired $10 million in redeemable noncontrolling interests (exclusive of interests related to a subsidiary in India) and triggered the related redemption features which provide the holders the option to require the Company to redeem the noncontrolling interests. The noncontrolling interest partners have elected not to require the Company to redeem their shares. The redemption of these redeemable noncontrolling interests is not solely within the Company's control. Accordingly, these noncontrolling interests are presented in the temporary equity section of the Company's consolidated balance sheets. The Company does not believe it is probable the redemption features related to these noncontrolling interest securities will be triggered as a change in control event is generally not probable until it occurs. As a result the noncontrolling interests have not been remeasured to redemption value. In addition, the Company acquired $86 million in redeemable noncontrolling interests related to a subsidiary in India. The Company initiated the process to make a tender offer of the shares it does not own due to the change in control in accordance with local regulations triggered by the Acquisition. It is probable these shares will become redeemable during 2019 under the tender offer at a price that is representative of fair value and as a result the noncontrolling interest is presented in the temporary equity section of the Company’s consolidated balance sheets. At the Acquisition date, this redeemable noncontrolling interest was recorded at its estimated fair value based on the preliminary purchase price allocation. The carrying amount for this redeemable noncontrolling interest at December 31, 2018 is currently greater than the redemption value as evidenced by the tender offer price resulting in no adjustment to reflect the noncontrolling interest at redemption value. At December 31, 2018 , the Company had previously held redeemable noncontrolling interests of $35 million , for which the redemption is not solely within the Company's control and these noncontrolling interests are presented in the temporary equity section of the Company's consolidated balance sheets. The Company does not believe it is probable the redemption features related to these noncontrolling interest securities will be triggered as a change in control event is generally not probable until it occurs. As such, the noncontrolling interests have not been remeasured to redemption value.
Long-Lived Assets	Long-Lived Assets: Long-lived assets, such as property, plant and equipment and definite-lived intangible assets are recorded at cost or fair value established at acquisition. Definite-lived intangible assets include customer relationships and platforms, patented and unpatented technology, and licensing agreements. Long-lived asset groups are evaluated for impairment when impairment indicators exist. If the carrying value of a long-lived asset group is impaired, an impairment charge is recorded for the amount by which the carrying value of the long-lived asset group exceeds its fair value. Depreciation and amortization are computed principally on a straight-line basis over the estimated useful lives of the assets for financial reporting purposes. Expenditures for maintenance and repairs are expensed as incurred.
Goodwill, net	Goodwill, net: Goodwill is determined as the excess of fair value over amounts attributable to specific tangible and intangible assets. Goodwill is evaluated for impairment annually, during the fourth quarter, or more frequently, if impairment indicators exist. An impairment indicator exists when a reporting unit's carrying value exceeds its fair value. When performing the goodwill impairment testing, a reporting units' fair value is based on valuation techniques using the best available information. The assessment of fair value utilizes a combination of the income approach and market approach. The impairment charge is the excess of the goodwill carrying value over the implied fair value of goodwill using a one-step quantitative approach.
Trademarks and brand names	rademarks: Trade names and trademarks are stated at fair value established at acquisition or cost. These indefinite-lived intangible assets will be evaluated for impairment annually during the fourth quarter, or more frequently, if impairment indicators exist. An impairment exists when a trade name and trademarks' carrying value exceeds its fair value. The fair values of these assets are based upon the prospective stream of hypothetical after-tax royalty cost savings discounted at rates that reflect the rates of return appropriate for these intangible assets. The impairment charge is the excess of the assets carrying value over its fair value.
Pre-production Design and Development and Tooling Assets	Pre-production Design and Development and Tooling Assets: The Company expenses pre-production design and development costs as incurred unless there is a contractual guarantee for reimbursement from the original equipment customer. Costs for molds, dies and other tools used to make products sold on long-term supply arrangements for which the Company has title to the assets are capitalized in property, plant and equipment and amortized to cost of sales over the shorter of the term of the arrangement or over the estimated useful lives of the assets. Costs for molds, dies and other tools used to make products sold on long-term supply arrangements for which the Company has a contractual guarantee for reimbursement or has the non-cancelable right to use the assets during the term of the supply arrangement from the customer are capitalized in prepayments and other current assets. Prepayments and other current assets included $193 million and $142 million at December 31, 2018 and 2017 , respectively, for in-process tools and dies being built for OE customers and unbilled pre-production design and development costs.
Internal Use Software Assets	Internal Use Software Assets: Certain costs related to the purchase and development of software used in the business operations are capitalized. Costs attributable to these software systems are amortized over their estimated useful lives based on various factors such as the effects of obsolescence, technology, and other economic factors. Additions to capitalized software development costs, including payroll and payroll-related costs for those employees directly associated with developing and obtaining the internal use software, are classified as investing activities in the consolidated statements of cash flows.
Income Taxes	Income Taxes: Deferred tax assets and liabilities are recognized on the basis of the future tax consequences attributable to temporary differences that exist between the financial statement carrying value of assets and liabilities and the respective tax values, and net operating losses ("NOL") and tax credit carryforwards on a taxing jurisdiction basis. Deferred tax assets and liabilities are measured using enacted tax rates that will apply in the years in which the temporary differences are expected to be recovered or paid. The effect on deferred tax assets and liabilities of a change in tax rates is recorded in the results of operations in the period that includes the enactment date under the law. Deferred income tax assets are evaluated quarterly to determine if valuation allowances are required or should be adjusted. Valuation allowances are established in certain jurisdictions based on a more likely than not standard. The ability to realize deferred tax assets depends on the Company's ability to generate sufficient taxable income within the carryback or carryforward periods provided for in the tax law for each tax jurisdiction. The Company considers the various possible sources of taxable income when assessing the realization of its deferred tax assets. The valuation allowances recorded against deferred tax assets generated by taxable losses in certain jurisdictions will effect the provision for income taxes until the valuation allowances are released. The Company's provision for income taxes will include no tax benefit for losses incurred and no tax expense with respect to income generated in these jurisdictions until the respective valuation allowance is eliminated. The Company records uncertain tax positions on the basis of a two-step process whereby it is determined whether it is more likely than not that the tax positions will be sustained based on the technical merits of the position, and for those tax positions that meet the more likely than not criteria, the largest amount of tax benefit that is greater than 50% likely to be realized upon ultimate settlement with the related tax authority is recognized. The Company elected to account for Global Intangible Low-Taxed Income (“GILTI”) as a current-period expense when incurred. Therefore, the Company has not recorded deferred taxes for basis differences expected to reverse in the future periods.
Pension and other postretirement benefit plan obligations	Pension and other postretirement benefit plan obligations: Pensions and other postretirement employee benefit costs and related liabilities and assets are dependent upon assumptions used in calculating such amounts. These assumptions include discount rates, long term rate of return on plan assets, health care cost trends, compensation, and other factors. Actual results that differ from the assumptions used are accumulated and amortized over future periods, and accordingly, generally affect recognized expense in future periods. The cost of benefits provided by defined benefit pension and other postretirement plans is recorded in the period employees provide service. Future pension expense for certain significant funded benefit plans is calculated using an expected return on plan asset methodology. Investments with registered investment companies, common and preferred stocks, and certain government debt securities are valued at the closing price reported on the active market on which the securities are traded. Corporate debt securities are valued by third-party pricing sources using the multi-dimensional relational model using instruments with similar characteristics. Hedge funds and the collective trusts are valued at net asset value (NAV) per share which are provided by the respective investment sponsors or investment advisers.
Revenue Recognition	Revenue Recognition: The Company adopted Financial Accounting Standards Board ("FASB") Accounting Standards Update ("ASU") 2014-09 on January 1, 2018, which required it to recognize revenue when a customer obtains control rather than when substantially all risks and rewards of a good or service have been transferred. ASU 2014-09 was adopted by applying the modified retrospective method; see the Recently Adopted Accounting Standards section for additional information pertaining to the adoption of ASU 2014-09. The comparative information has not been adjusted and continues to be reported under the accounting standards in effect for those periods. The following accounting policies became effective upon the adoption of ASU 2014-09: The Company accounts for a contract with a customer when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance, and collectability of consideration is probable. Revenue is recognized for sales to OE and aftermarket customers when transfer of control of the related good or service has occurred. Revenue from most OE and aftermarket goods and services is transferred to customers at a point in time. Contract terms with certain OE customers results in products and services being transferred over time due to the customized nature of some of the Company's products together with contractual provisions in certain customer contracts that provide the Company with an enforceable right to payment for performance completed to date. The Company considers an input measure (e.g., costs incurred to date relative to total estimated costs at completion) as a fair measure of progress for the recognition of over time revenue associated with these customized parts. A cost measure best depicts the means of transfer of goods to the customer, which occurs as the Company incurs costs to fulfill contracts. The customer is invoiced once transfer of control has occurred and the Company has a right to payment. Typical payment terms vary based on the customer and the type of goods and services in the contract. The period of time between invoicing and when payment is due is not significant. Amounts billed and due from customers are classified as receivables on the consolidated balance sheets. Standard payment terms are less than one year and the Company has elected the practical expedient to not assess whether a contract has a significant financing component if the payment terms are less than one year. Performance Obligations: The majority of the Company's customer contracts with OE and aftermarket customers are long-term supply arrangements. The performance obligations are established by the enforceable contract, which is generally considered to be the purchase order but in some cases could be the delivery release schedule. The purchase order, or related delivery release schedule, is of a duration of less than one year. As such, the Company applies the practical expedient and does not disclose information about remaining performance obligations that have original expected durations of one year or less, for which work has not yet been performed. Rebates: The Company accrues for rebates pursuant to specific arrangements with certain customers, primarily in the aftermarket. Rebates generally provide for payments to customers based upon the achievement of specified purchase volumes and are recorded as a reduction of sales as earned by such customers. Product returns: Certain aftermarket contracts with customers include terms and conditions that result in a customer right of return that is accounted for on a gross basis. For these contracts the Company has recorded a refund liability and return asset within "Prepayments and other current assets." Shipping and handling costs: Shipping and handling costs associated with outbound freight after control of a product has transferred to a customer are accounted for as a fulfillment cost and are included in cost of sales in the consolidated statements of income. Sales and sales related taxes: The Company collects and remits taxes assessed by various governmental authorities that are both imposed on and concurrent with revenue-producing transactions with its customers. These taxes may include, but are not limited to, sales, use, value-added, and some excise taxes. The collection and remittance of these taxes is reported on a net basis. Contract Balances: Contract assets primarily relate to the Company’s rights to consideration for work completed but not billed at the reporting date on contracts with customers. The contract assets are transferred to receivables when the rights become unconditional. Contract liabilities primarily relate to contracts where advance payments or deposits have been received, but performance obligations have not yet been met, and therefore, revenue has not been recognized. There have been no impairment losses recognized related to any receivables or contract assets arising from the Company’s contracts with customers.
Engineering, Research and Development	Engineering, Research, and Development: The Company records engineering, research, and development costs ("R&D") net of customer reimbursements as they are considered a recovery of cost.
Advertising and Promotion Expenses	Advertising and Promotion Expenses: The Company expenses advertising and promotional expenses as incurred and these expenses were $36 million , $40 million , and $40 million for the years ended December 31, 2018 , 2017 , and 2016 .
Foreign currency translation	Foreign currency translation: Exchange adjustments related to foreign currency transactions and translation adjustment for foreign subsidiaries whose functional currency is the U.S. dollar are reflected in the consolidated statements of income. Translation adjustments of foreign subsidiaries for which local currency is functional currency are reflected in the consolidated balance sheets as a component of accumulated other comprehensive income (loss). Transaction gains and losses arising from fluctuations in currency exchange rates on transactions denominated in currencies other than the functional currency are recognized in earnings as incurred, except for those intercompany balances which are designated as long-term investments. The amounts recorded in cost of sales in the consolidated statements of income for foreign currency transactions included $15 million of gains for the year ended December 31, 2018 , $4 million of losses for the year ended December 31, 2017 and $1 million of gains for the year ended December 31, 2016 .
Asset Retirement Obligations	Asset Retirement Obligations: The Company records asset retirement obligations (ARO) when liabilities are probable and amounts can be reasonably estimated. The Company's primary ARO activities relate to the removal of hazardous building materials at its facilities.
Derivative Financial Instruments	Derivative Financial Instruments: For derivative instruments to qualify as hedging instruments, they must be designated as a fair value hedge, cash flow hedge or a hedge of a net investment in a foreign operation. Gains and losses related to a hedge are either recognized in income immediately to offset the gain or loss on the hedged item or are deferred and reported as a component of accumulated other comprehensive income (loss) and subsequently recognized in earnings when the hedged item affects earnings. The change in fair value of the ineffective portion of a derivative financial instrument, determined using the hypothetical derivative method, is recognized in earnings immediately. The gain or loss related to derivative financial instruments not designated as hedges are recognized immediately in earnings. Cash flows related to hedging activities are included in the operating section of the consolidated statements of cash flows.
New Accounting Pronouncements	New Accounting Pronouncements Adoption of New Accounting Standards Revenue recognition: The Company adopted ASU No. 2014-09, as incorporated into Accounting Standards Codification (ASC) Topic 606, Revenue from Contracts with Customers ("ASC 606"), on January 1, 2018, using the modified retrospective application method under which the cumulative effect is recognized in equity at the date of initial application. Therefore, the comparative information has not been adjusted and continues to be reported under previous guidance. ASC 606 has been applied to all contracts at the date of initial application. The details of significant changes and quantitative effect of the changes are disclosed below. Product returns: The Company previously recognized product returns as a reduction in revenue based on the estimated product return rate. Under ASC 606, the Company continues to recognize this liability but also recognizes the value of the inventory to be returned. Timing of revenue recognition: The Company previously recognized revenue when title and risk of loss passed to the customer. Upon the adoption of ASC 606, there was a change in the pattern of revenue recognition for certain customized parts where the Company has a right to payment. As a result of the adoption, the revenue from these contracts is now being recognized over-time because the customized parts are considered to be assets with limited alternative use and the Company has an enforceable right to payment for work completed to date. The Company considers the costs incurred (input method) as a fair measure of progress for the over-time recognition of revenue associated with these customized parts. The cumulative effect of the adoption was recognized as a decrease to accumulated deficit of $1 million and the changes made to the consolidated January 1, 2018 opening consolidated balance sheets for the adoption of ASC Topic 606 were as follows: Balance at December 31, 2017 Over-time recognition Balance at January 1, 2018 Consolidated Balance Sheets (Millions) Assets Inventory $ 820 $ (5 ) $ 815 Prepayments and other current assets $ 288 $ 6 $ 294 Equity Accumulated deficit $ (1,009 ) $ 1 $ (1,008 ) The following tables summarize the effects of adopting ASC Topic 606 on the Company’s consolidated financial statements as of and for the year ended December 31, 2018: December 31, 2018 As Reported Product returns Over-time recognition Balances Without Adoption of ASC Topic 606 (Millions) Consolidated Balance Sheets Assets Inventory $ 2,245 $ — $ 8 $ 2,253 Prepayments and other current assets $ 590 $ (44 ) $ (9 ) $ 537 Liabilities Accrued expenses and other current liabilities $ 1,001 $ (44 ) $ — $ 957 Equity Accumulated deficit $ (1,013 ) $ — $ (1 ) $ (1,014 ) Year Ended December 31, 2018 As Reported Product returns Over-time recognition Balances Without Adoption of ASC Topic 606 (Millions) Consolidated Statements of Income Revenues Net sales and operating revenues $ 11,763 $ 2 $ 3 $ 11,768 Cost and expenses Cost of sales (exclusive of depreciation and amortization) $ 10,071 $ (2 ) $ (3 ) $ 10,066 For the year ended December 31, 2018, there would have been no change to "Net cash provided from (used by) operating activities'' under prior accounting principles. Income taxes: In October 2016, the FASB issued ASU 2016-16, Income Taxes—Intra Entity Transfers of Assets Other Than Inventory (Topic 740). The new standard changes the accounting for income taxes when a company transfers certain tangible and intangible assets, such as equipment or intellectual property, between entities in different tax jurisdictions. The new standard does not change the current accounting for the income taxes related to transfers of inventory. This standard is effective for the Company for its financial statements issued for annual periods beginning after December 15, 2017, and interim periods within those annual periods. The Company adopted this ASU on January 1, 2018 using the modified retrospective method. The cumulative effect of the adoption was recognized as an increase to accumulated deficit of $1 million . Retirement Benefits: Effective January 1, 2018, the Company adopted FASB ASU 2017-07, Retirement Benefits. As a result of adoption, the non-service cost components of net periodic pension and postretirement benefit cost previously presented in cost of sales and selling, general, and administrative expense have been reclassified to non-service pension and postretirement benefit cost. These financial statements have been retrospectively adjusted to reflect this change in accounting principle for the years ended December 31, 2017 and 2016. The following tables summarize the effects of adopting the new standard on our consolidated financial statements: Year Ended December 31, 2017 Prior to Change in Accounting Principle Effective of Accounting Change After Change in Accounting Principle (Millions) Consolidated Statements of Income Cost of Sales $ 7,815 $ (3 ) $ 7,812 Selling, general, and administrative $ 650 $ (12 ) $ 638 Non-service pension and postretirement benefit costs $ — $ 16 $ 16 Other (income) expense $ (1 ) $ (1 ) $ (2 ) Year Ended December 31, 2016 Prior to Change in Accounting Principle Effective of Accounting Change After Change in Accounting Principle (Millions) Consolidated Statements of Income Cost of Sales $ 7,133 $ (7 ) $ 7,126 Selling, general, and administrative $ 590 $ (76 ) $ 514 Non-service cost pension and other postretirement benefits $ — $ 84 $ 84 Other expense $ — $ (1 ) $ (1 ) Deferred Purchase Price: Effective January 1, 2018, the Company adopted ASU 2016-15, Statement of Cash Flow—Classification of certain cash receipts and cash payments (Topic 230). This ASU addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. The retrospective adoption of this ASU resulted in the reclassification of cash received to settle the deferred purchase price of factored receivables to an investing activity in the consolidated statement of cash flows. Prior to adoption this amount would have been recorded as an operating activity in the consolidated statement of cash flows. The Company also now presents the transfer of trade receivables in exchange for a beneficial interest in the factored receivables as a non-cash investing activity. Restricted Cash: Effective January 1, 2018, the Company adopted ASU 2016-18, Statement of Cash Flows—Restricted Cash (Topic 230) to eliminate diversity in practice in the presentation of restricted cash and restricted cash equivalents in the statement of cash flows. Under this standard, the change in restricted cash is no longer presented as an investing activity in the consolidated statement of cash flows. The following tables summarize the effects of adopting ASU 2016-18 and ASU 2016-15 on our consolidated statements of cash flows for the years ended December 31, 2017 and 2016:. Year Ended December 31, 2017 Prior to Change in Accounting Principle Effect of ASU 2016-18 Effect of ASU 2016-15 After Change in Accounting Principle (Millions) Consolidated Statements of Cash Flows Decrease (increase) in receivables $ 31 $ — $ (112 ) $ (81 ) Net cash provided by operating activities 629 — (112 ) 517 Change in restricted cash (1 ) 1 — — Proceeds from deferred purchase price of factored receivables — — 112 112 Net cash used by investing activities (413 ) 1 112 (300 ) Decrease in cash, cash equivalents and restricted cash (32 ) 1 — (31 ) Cash, cash equivalents and restricted cash, January 1 347 2 — 349 Cash, cash equivalents and restricted cash, December 31 $ 315 $ 3 $ — $ 318 Year Ended December 31, 2016 Prior to Change in Accounting Principle Effect of ASU 2016-18 Effect of ASU 2016-15 After Change in Accounting Principle (Millions) Consolidated Statements of Cash Flows Increase in receivables $ (215 ) $ — $ (110 ) $ (325 ) Net cash provided by operating activities 484 — (110 ) 374 Change in restricted cash (1 ) 1 — — Proceeds from deferred purchase price of factored receivables — — 110 110 Net cash used by investing activities (340 ) 1 110 (229 ) Increase in cash, cash equivalents and restricted cash 60 1 — 61 Cash, cash equivalents and restricted cash, January 1 287 1 — 288 Cash, cash equivalents and restricted cash, December 31 $ 347 $ 2 $ — $ 349 Accounting Standards Issued But Not Yet Adopted Intangibles: In August 2018, the FASB issued ASU 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. The amendments in this update align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments in this update. The amendments in this update are effective for interim and annual periods for the Company beginning on January 1, 2020, with early adoption permitted. The amendments in this update should be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. The Company is currently evaluating the potential effect of this new guidance on its consolidated financial statements. Retirement benefits: In August 2018, the FASB issued ASU 2018-14, Compensation-Retirement Benefits-Defined Benefit Plans-General (Subtopic 715-20). The amendments in this update remove disclosures that no longer are considered cost beneficial, clarify the specific requirements of disclosures, and add disclosure requirements identified as relevant. The amendments in this update are effective for fiscal years ending after December 15, 2020 with early adoption permitted. The Company is currently evaluating the potential effect of this new guidance on its consolidated financial statements. Fair value measurements: In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820). The new guidance modifies disclosure requirements related to fair value measurement. The amendments in this ASU are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Implementation on a prospective or retrospective basis varies by specific disclosure requirement. Early adoption is permitted. The standard also allows for early adoption of any removed or modified disclosures upon issuance of this ASU while delaying adoption of the additional disclosures until their effective date. The Company is currently evaluating the potential effect of this new guidance on its consolidated financial statements. Comprehensive income: In February 2018, the FASB issued ASU 2018-02, Income Statement—Reporting Comprehensive Income (Topic 220). The amendments in this update allow a reclassification from accumulated other comprehensive income (loss) to accumulated deficit for stranded tax effects resulting from the Tax Cuts and Jobs Act ("TCJA"). Consequently, the amendments allow for an election to eliminate the stranded tax effects resulting from the TCJA and will improve the usefulness of information reported to financial statement users. However, because the amendments only relate to the reclassification of the income tax effects of the TCJA, the underlying guidance that requires the effect of a change in tax laws or rates be included in income from continuing operations is not affected. The amendments in this update also require certain disclosures about stranded tax effects. The amendments in this update are effective for all entities for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. The Company has elected not to adopt the optional reclassification. Leases: In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). This update supersedes the lease requirements in Topic 840, Leases. The objective of Topic 842 is to establish the principles that lessees and lessors shall apply to report useful information to users of financial statements about the amount, timing, and uncertainty of cash flow arising from a lease. For public business entities, the standard is effective for financial statements issued for annual periods beginning after December 15, 2018, and interim periods within those annual periods. The Company will adopt this update on January 1, 2019 using the modified retrospective method without the recasting of comparative periods’ financial information, as permitted by the transition guidance. The Company is finalizing its implementation efforts including final review of lease arrangements and completion of its system implementations. The Company is still quantifying the effect of adoption but does not anticipate a material effect to the consolidated statements of income; however, it does expect a material effect on the consolidated balance sheets as it recognizes the right-of-use assets and liabilities for operating leases. The Company intends to adopt the package of practical expedients that allow companies to not reassess and will carry forward historical conclusions related to contracts that contain leases, existing lease classification, and initial direct costs. It does not intend to adopt the hindsight practical expedient and has also made an accounting policy election to exempt leases with an initial term of twelve months or less from balance sheets recognition. Instead, short-term leases will be expensed over the lease term. As a part of the implementation efforts, the Company has reviewed its internal control structure and does not anticipate its internal control framework will materially change, but rather existing internal controls will be modified and augmented, as necessary.

Summary of Accounting Policie_2

Summary of Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Schedule of Error Corrections and Prior Period Adjustments	The following tables present the effect of these reclassifications and revisions for the financial statement line items adjusted in the affected periods included within this annual financial report: Year Ended December 31, 2017 As Reported Reclasses As Reclassified Revisions As Revised (Millions, except per share amounts) Consolidated statement of income Revenues Net sales and operating revenues $ 9,274 $ — $ 9,274 $ — $ 9,274 Costs and expenses Cost of sales (exclusive of depreciation and amortization) 7,809 — 7,809 3 7,812 Selling, general, and administrative 636 — 636 2 638 Depreciation and amortization 224 — 224 2 226 Engineering, research, and development 158 — 158 — 158 Goodwill impairment charge 11 — 11 — 11 8,838 — 8,838 7 8,845 Other expense (income) Loss on sale of receivables 5 — 5 — 5 Non-service pension and postretirement benefit costs — 16 16 — 16 Loss on extinguishment of debt — 1 1 — 1 Equity in (earnings) losses of nonconsolidated affiliates, net of tax — 1 1 — 1 Other expense (income), net 14 (17 ) (3 ) 1 (2 ) 19 1 20 1 21 Earnings before interest expense, income taxes, and noncontrolling interests 417 (1 ) 416 (8 ) 408 Interest expense 73 (1 ) 72 — 72 Earnings before income taxes and noncontrolling interests 344 — 344 (8 ) 336 Income tax expense (benefit) 70 — 70 1 71 Net income 274 — 274 (9 ) 265 Less: Net income attributable to noncontrolling interests 67 67 — 67 Net income attributable to Tenneco Inc. $ 207 $ — $ 207 $ (9 ) $ 198 Earnings per share Weighted average shares of common stock outstanding — Basic earnings per share of common stock $ 3.93 $ — $ 3.93 $ (0.18 ) $ 3.75 Diluted earnings per share of common stock $ 3.91 $ — $ 3.91 $ (0.18 ) $ 3.73 Year Ended December 31, 2017 As Reported Reclasses As Reclassified Revisions As Revised Consolidated statement of comprehensive income (Millions) Net income $ 274 $ — $ 274 $ (9 ) $ 265 Other comprehensive income (loss)—net of tax Foreign currency translation adjustment 99 — 99 7 106 Defined benefit plans 27 — 27 (10 ) 17 126 — 126 (3 ) 123 Comprehensive income (loss) 400 — 400 (12 ) 388 Less: Comprehensive income (loss) attributable to noncontrolling interests 69 — 69 — 69 Comprehensive income (loss) attributable to common shareholders $ 331 $ — $ 331 $ (12 ) $ 319 Year Ended December 31, 2016 As Reported Reclasses As Reclassified Revisions As Revised (Millions, except per share amounts) Consolidated statement of income Revenues Net sales and operating revenues $ 8,599 $ — $ 8,599 $ (2 ) $ 8,597 Costs and expenses Cost of sales (exclusive of depreciation and amortization) 7,116 — 7,116 10 7,126 Selling, general, and administrative 513 — 513 1 514 Depreciation and amortization 212 — 212 1 213 Engineering, research, and development 154 — 154 (1 ) 153 7,995 — 7,995 11 8,006 Other expense (income) Loss on sale of receivables 5 — 5 — 5 Non-service pension and postretirement benefit costs — 84 84 — 84 Loss on extinguishment of debt — 24 24 — 24 Other expense (income), net 83 (84 ) (1 ) — (1 ) 88 24 112 — 112 Earnings before interest expense, income taxes, and noncontrolling interests 516 (24 ) 492 (13 ) 479 Interest expense 92 (24 ) 68 — 68 Earnings before income taxes and noncontrolling interests 424 — 424 (13 ) 411 Income tax expense (benefit) — — — (4 ) (4 ) Net income 424 — 424 (9 ) 415 Less: Net income attributable to noncontrolling interests 68 — 68 — 68 Net income attributable to Tenneco Inc. $ 356 $ — $ 356 $ (9 ) $ 347 Earnings per share Weighted average shares of common stock outstanding — Basic earnings per share of common stock $ 6.36 $ — $ 6.36 $ (0.16 ) $ 6.20 Diluted earnings per share of common stock $ 6.31 $ — $ 6.31 $ (0.16 ) $ 6.15 Year Ended December 31, 2016 As Reported Reclasses As Reclassified Revisions As Revised Consolidated statement of comprehensive income (Millions) Net income $ 424 $ — $ 424 $ (9 ) $ 415 Other comprehensive income (loss)—net of tax Foreign currency translation adjustment (45 ) — (45 ) (11 ) (56 ) Defined benefit plans 41 — 41 10 51 (4 ) — (4 ) (1 ) (5 ) Comprehensive income (loss) 420 — 420 (10 ) 410 Less: Comprehensive income (loss) attributable to noncontrolling interests 64 — 64 — 64 Comprehensive income (loss) attributable to common shareholders $ 356 $ — $ 356 $ (10 ) $ 346 December 31, 2017 As Reported Reclasses As Reclassified Revisions As Revised Consolidated balance sheet (Millions) Current assets: Cash and cash equivalents $ 315 $ — $ 315 $ — $ 315 Restricted cash 3 — 3 — 3 Receivables: Customer notes and accounts, net 1,294 — 1,294 — 1,294 Other 27 — 27 — 27 Inventories 869 — 869 (49 ) 820 Prepayments and other current assets 291 — 291 (3 ) 288 Total current assets 2,799 — 2,799 (52 ) 2,747 Property, plant and equipment, net 1,615 79 1,694 (3 ) 1,691 Long-term receivables, net 9 — 9 — 9 Goodwill 49 — 49 — 49 Intangibles, net 22 — 22 — 22 Investments in nonconsolidated affiliates — 2 2 — 2 Deferred income taxes 204 — 204 9 213 Other assets 144 (81 ) 63 — 63 Total assets $ 4,842 $ — $ 4,842 $ (46 ) $ 4,796 Short-term debt, including current maturities of long-term debt $ 83 $ 20 $ 103 $ — $ 103 Accounts payable 1,705 (123 ) 1,582 — 1,582 Accrued compensation and employee benefits 141 141 — 141 Accrued income taxes 45 (20 ) 25 2 27 Accrued interest 14 (14 ) — — — Accrued liabilities 287 (287 ) — — — Other 132 (132 ) — — Accrued expenses and other current liabilities 415 415 9 424 Total current liabilities 2,266 — 2,266 11 2,277 Long-term debt 1,358 — 1,358 — 1,358 Deferred income taxes 11 — 11 — 11 Pension and postretirement benefits 268 — 268 — 268 Deferred credits and other liabilities 155 — 155 3 158 Commitments and contingencies Total liabilities 4,058 — 4,058 14 4,072 Redeemable noncontrolling interests 42 42 — 42 Tenneco Inc. shareholders’ equity: Preferred stock—$0.01 par value; none issued — — — — — Class A voting common stock—$0.01 par value; shares issued: (2018—71,675,379; 2017—66,033,509) 1 — 1 — 1 Additional paid-in capital 3,112 — 3,112 — 3,112 Accumulated other comprehensive loss (541 ) — (541 ) 3 (538 ) Accumulated deficit (946 ) — (946 ) (63 ) (1,009 ) 1,626 — 1,626 (60 ) 1,566 Shares held as treasury stock—at cost: 2018 and 2017—14,592,888 shares (930 ) — (930 ) — (930 ) Total Tenneco Inc. shareholders’ equity 696 — 696 (60 ) 636 Noncontrolling interests 46 — 46 — 46 Total equity 742 — 742 (60 ) 682 Total liabilities, redeemable noncontrolling interests and equity $ 4,842 $ — $ 4,842 $ (46 ) $ 4,796 Year Ended December 31, 2017 As Reported Reclasses As Reclassified Revisions As Revised Consolidated statements of cash flow (Millions) Operating Activities Net income $ 274 $ — $ 274 $ (9 ) $ 265 Net cash provided by operating activities 517 — 517 — 517 Investing Activities Net cash used by investing activities (300 ) — (300 ) — (300 ) Financing Activities Proceeds from term loans and notes — 137 137 23 160 Repayments of term loans and notes — (19 ) (19 ) (17 ) (36 ) Retirement of long-term debt (19 ) 19 — — — Issuance of long-term debt 137 (137 ) — — — Borrowings on revolving lines of credit — — — 6,664 6,664 Payments on revolving lines of credit — — — (6,737 ) (6,737 ) Net increase (decrease) in revolver borrowings (67 ) — (67 ) 67 — Net cash provided (used) by financing activities $ (251 ) $ — $ (251 ) $ — $ (251 ) Year Ended December 31, 2016 As Reported Reclasses As Reclassified Revisions As Revised Consolidated statements of cash flow (Millions) Operating Activities Net income $ 424 $ — $ 424 $ (9 ) $ 415 Net cash provided by operating activities 374 — 374 — 374 Investing Activities Net cash used by investing activities (229 ) — (229 ) — (229 ) Financing Activities Proceeds from term loans and notes — 509 509 20 529 Repayments of term loans and notes — (531 ) (531 ) (14 ) (545 ) Retirement of long-term debt (531 ) 531 — — — Issuance of long-term debt 509 (509 ) — — — Borrowings on revolving lines of credit — — — 5,417 5,417 Payments on revolving lines of credit — — — (5,221 ) (5,221 ) Net increase (decrease) in revolver borrowings 202 — 202 (202 ) — Net cash provided (used) by financing activities $ (86 ) $ — $ (86 ) $ — $ (86 ) Year Ended December 31, 2017 As Reported Revisions As Revised Consolidated statements of shareholders' equity (Millions) Accumulated Deficit Balance January 1 $ (1,100 ) $ (54 ) $ (1,154 ) Net income attributable to Tenneco Inc. 207 (9 ) 198 Cash dividends declared (53 ) — (53 ) Balance December 31 $ (946 ) $ (63 ) $ (1,009 ) Accumulated Other Comprehensive Loss Balance January 1 $ (665 ) $ 6 $ (659 ) Other comprehensive loss —net of tax : Foreign currency translation adjustment 97 7 104 Defined benefit plans 27 (10 ) 17 Balance December 31 $ (541 ) $ 3 $ (538 ) Total Tenneco Inc. Shareholders' Equity Balance January 1 $ 573 $ (48 ) $ 525 Net income attributable to Tenneco Inc. 207 (9 ) 198 Other comprehensive loss—net of tax: Foreign currency translation adjustment 97 7 104 Defined benefit plans 27 (10 ) 17 Comprehensive income 331 (12 ) 319 Stock-based compensation expense 14 — 14 Cash dividends (53 ) — (53 ) Treasury stock (169 ) — (169 ) Balance December 31 $ 696 $ (60 ) $ 636 Total Equity Balance January 1 $ 620 $ (48 ) $ 572 Net income 238 (9 ) 229 Other comprehensive loss—net of tax: Foreign currency translation adjustment 96 7 103 Defined benefit plans 27 (10 ) 17 Comprehensive income 361 (12 ) 349 Stock-based compensation expense 14 — 14 Cash dividends (53 ) — (53 ) Treasury stock (169 ) — (169 ) Distributions declared to noncontrolling interests (31 ) — (31 ) Balance December 31 $ 742 $ (60 ) $ 682 Year Ended December 31, 2016 As Reported Revisions As Revised Consolidated statements of shareholders' equity (Millions) Accumulated Deficit Balance January 1 $ (1,456 ) $ (45 ) $ (1,501 ) Net income attributable to Tenneco Inc. 356 (9 ) 347 Balance December 31 $ (1,100 ) $ (54 ) $ (1,154 ) Accumulated Other Comprehensive Loss Balance January 1 $ (665 ) $ 7 $ (658 ) Other comprehensive loss—net of tax: Foreign currency translation adjustment (41 ) (11 ) (52 ) Defined benefit plans 41 10 51 Balance December 31 $ (665 ) $ 6 $ (659 ) Total Tenneco Inc. shareholders' equity Balance January 1 $ 425 $ (38 ) $ 387 Net income attributable to Tenneco Inc. 356 (9 ) 347 Other comprehensive loss—net of tax: Foreign currency translation adjustment (41 ) (11 ) (52 ) Defined benefit plans 41 10 51 Comprehensive income 356 (10 ) 346 Stock-based compensation expense 17 — 17 Treasury stock (225 ) — (225 ) Balance December 31 $ 573 $ (48 ) $ 525 Total Equity Balance January 1 $ 464 $ (38 ) $ 426 Net income 388 (9 ) 379 Other comprehensive loss—net of tax: Foreign currency translation adjustment (43 ) (11 ) (54 ) Defined benefit plans 41 10 51 Comprehensive income 386 (10 ) 376 Stock-based compensation expense 17 — 17 Treasury stock (225 ) — (225 ) Distribution declared to noncontrolling interests (22 ) — (22 ) Balance December 31 $ 620 $ (48 ) $ 572
Redeemable Noncontrolling Interests	The following is a rollforward of the activity in the redeemable noncontrolling interests for the years ended December 31, 2018 , 2017 and 2016 : December 31 2018 2017 2016 (Millions) Balance January 1 $ 42 $ 40 $ 41 Federal-Mogul acquisition 96 — — Net income attributable to redeemable noncontrolling interests 29 36 36 Other comprehensive (loss) income (2 ) 3 (2 ) Contributions received 6 — — Dividends declared (33 ) (37 ) (35 ) Balance December 31 $ 138 $ 42 $ 40
Schedule of Changes in Accounting Principles	The following tables summarize the effects of adopting the new standard on our consolidated financial statements: Year Ended December 31, 2017 Prior to Change in Accounting Principle Effective of Accounting Change After Change in Accounting Principle (Millions) Consolidated Statements of Income Cost of Sales $ 7,815 $ (3 ) $ 7,812 Selling, general, and administrative $ 650 $ (12 ) $ 638 Non-service pension and postretirement benefit costs $ — $ 16 $ 16 Other (income) expense $ (1 ) $ (1 ) $ (2 ) Year Ended December 31, 2016 Prior to Change in Accounting Principle Effective of Accounting Change After Change in Accounting Principle (Millions) Consolidated Statements of Income Cost of Sales $ 7,133 $ (7 ) $ 7,126 Selling, general, and administrative $ 590 $ (76 ) $ 514 Non-service cost pension and other postretirement benefits $ — $ 84 $ 84 Other expense $ — $ (1 ) $ (1 ) The following tables summarize the effects of adopting ASU 2016-18 and ASU 2016-15 on our consolidated statements of cash flows for the years ended December 31, 2017 and 2016:. Year Ended December 31, 2017 Prior to Change in Accounting Principle Effect of ASU 2016-18 Effect of ASU 2016-15 After Change in Accounting Principle (Millions) Consolidated Statements of Cash Flows Decrease (increase) in receivables $ 31 $ — $ (112 ) $ (81 ) Net cash provided by operating activities 629 — (112 ) 517 Change in restricted cash (1 ) 1 — — Proceeds from deferred purchase price of factored receivables — — 112 112 Net cash used by investing activities (413 ) 1 112 (300 ) Decrease in cash, cash equivalents and restricted cash (32 ) 1 — (31 ) Cash, cash equivalents and restricted cash, January 1 347 2 — 349 Cash, cash equivalents and restricted cash, December 31 $ 315 $ 3 $ — $ 318 Year Ended December 31, 2016 Prior to Change in Accounting Principle Effect of ASU 2016-18 Effect of ASU 2016-15 After Change in Accounting Principle (Millions) Consolidated Statements of Cash Flows Increase in receivables $ (215 ) $ — $ (110 ) $ (325 ) Net cash provided by operating activities 484 — (110 ) 374 Change in restricted cash (1 ) 1 — — Proceeds from deferred purchase price of factored receivables — — 110 110 Net cash used by investing activities (340 ) 1 110 (229 ) Increase in cash, cash equivalents and restricted cash 60 1 — 61 Cash, cash equivalents and restricted cash, January 1 287 1 — 288 Cash, cash equivalents and restricted cash, December 31 $ 347 $ 2 $ — $ 349 The cumulative effect of the adoption was recognized as a decrease to accumulated deficit of $1 million and the changes made to the consolidated January 1, 2018 opening consolidated balance sheets for the adoption of ASC Topic 606 were as follows: Balance at December 31, 2017 Over-time recognition Balance at January 1, 2018 Consolidated Balance Sheets (Millions) Assets Inventory $ 820 $ (5 ) $ 815 Prepayments and other current assets $ 288 $ 6 $ 294 Equity Accumulated deficit $ (1,009 ) $ 1 $ (1,008 ) The following tables summarize the effects of adopting ASC Topic 606 on the Company’s consolidated financial statements as of and for the year ended December 31, 2018: December 31, 2018 As Reported Product returns Over-time recognition Balances Without Adoption of ASC Topic 606 (Millions) Consolidated Balance Sheets Assets Inventory $ 2,245 $ — $ 8 $ 2,253 Prepayments and other current assets $ 590 $ (44 ) $ (9 ) $ 537 Liabilities Accrued expenses and other current liabilities $ 1,001 $ (44 ) $ — $ 957 Equity Accumulated deficit $ (1,013 ) $ — $ (1 ) $ (1,014 ) Year Ended December 31, 2018 As Reported Product returns Over-time recognition Balances Without Adoption of ASC Topic 606 (Millions) Consolidated Statements of Income Revenues Net sales and operating revenues $ 11,763 $ 2 $ 3 $ 11,768 Cost and expenses Cost of sales (exclusive of depreciation and amortization) $ 10,071 $ (2 ) $ (3 ) $ 10,066

Acquisitions and Divestitures (

Acquisitions and Divestitures (Tables)	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition	The following table summarizes the purchase price (in millions, except for share data): Tenneco shares issued for purchase of Federal-Mogul 29,444,846 Tenneco share price at October 1, 2018 $ 41.99 Fair value of the Stock Consideration 1,236 Cash Consideration (1) 811 Repayment of Federal-Mogul debt and accrued interest (2) 1,660 Total consideration $ 3,707 (1) Cash consideration also included $11 million in advisory fees paid to a third-party. (2) Portion of the proceeds from the issuance of the $4.9 billion new credit facility that was used to repay Federal-Mogul’s term loan and revolver loan of $1,455 million and $200 million , respectively, and the related accrued interest of $5 million .
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the preliminary fair values of assets acquired and liabilities assumed as of the acquisition date: (Millions) Cash, cash equivalents and restricted cash $ 277 Customer notes and accounts receivable 1,258 Other receivables 62 Inventories 1,551 Prepayments and other current assets 198 Property, plant and equipment 1,711 Long-term receivables 48 Goodwill 825 Intangibles 1,530 Investments in nonconsolidated affiliates 528 Deferred income taxes 166 Other assets 55 Total assets acquired 8,209 Short-term debt, including current maturities of long-term debt 130 Accounts payable 957 Accrued compensation and employee benefits 231 Accrued income taxes 49 Accrued expenses and other current liabilities 522 Long-term debt 1,315 Deferred income taxes 56 Pension and postretirement benefits 879 Deferred credits and other liabilities 124 Total liabilities assumed 4,263 Redeemable noncontrolling interests 96 Noncontrolling interests 143 Net assets and noncontrolling interests acquired $ 3,707
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination	Other intangible assets acquired include the following: Estimated Fair Value Weighted-Average Useful Lives (Millions) Definite-lived intangible assets: Customer platforms and relationships $ 964 10 years Technology rights 69 10 years Packaged kits know-how 36 10 years Licensing agreements 66 4.5 years Land use rights 30 42.8 years Total definite-lived intangible assets 1,165 10.5 years Indefinite-lived intangible assets: Trade names and trademarks 365 Total $ 1,530
Pro Forma Information	The following table summarizes, on a pro forma basis, the combined results of operations of the Company and Federal-Mogul business as though the Acquisition and the related financing had occurred as of January 1, 2017. The pro forma results are not necessarily indicative of either the actual consolidated results had the acquisition of Federal-Mogul occurred on December 31, 2016 or of future consolidated operating results. For the Year Ended December 31 2018 2017 (In millions, except per share amounts) Net sales and operating revenues $ 17,860 $ 17,153 Earnings before income taxes and noncontrolling interests $ 488 $ 235 Net income attributable to Tenneco Inc. $ 275 $ 372 Basic earnings per share of common stock $ 3.41 $ 4.52 Diluted earnings per share of common stock $ 3.40 $ 4.51
Disposal Groups, Including Discontinued Operations	The assets and liabilities classified as held for sale as of December 31, 2018 were as follows: December 31 2018 (Millions) Assets Inventories $ 33 Other current assets 5 Long-lived assets 23 Total assets held for sale $ 61 Liabilities Accounts payable $ 21 Accrued liabilities 7 Other liabilities 11 Total liabilities held for sale $ 39

Restructuring Charges and Ass_2

Restructuring Charges and Asset Impairments, Net (Tables)	12 Months Ended
	Dec. 31, 2018
Restructuring and Related Activities [Abstract]
Schedule of Restructuring	Amounts related to activities that were charged to restructuring reserves, including costs incurred to support future structural cost reductions, by reportable segments are as follows: Reportable Segments Clean Air Ride Performance Aftermarket Powertrain Motorparts Total Reportable Segments Other Total (Millions) Balance at December 31, 2015 $ 2 $ 24 $ 4 $ — $ — $ 30 $ — $ 30 Provisions 6 13 9 — — 28 2 30 Payments (6 ) (31 ) (7 ) — — (44 ) (1 ) (45 ) Balance at December 31, 2016 2 6 6 — — 14 1 15 Provisions 23 16 7 — — 46 1 47 Payments (12 ) (16 ) (9 ) — — (37 ) (2 ) (39 ) Foreign currency 1 1 — — — 2 — 2 Balance at December 31, 2017 14 7 4 — — 25 — 25 Federal-Mogul Acquisition — — — 22 15 37 — 37 Provisions 14 48 16 1 31 110 5 115 Held for sale — — — — (2 ) (2 ) — (2 ) Revisions to estimates — — — (3 ) — (3 ) — (3 ) Payments (10 ) (35 ) (12 ) (5 ) (4 ) (66 ) (2 ) (68 ) Foreign currency (1 ) — — — — (1 ) — (1 ) Balance at December 31, 2018 $ 17 $ 20 $ 8 $ 15 $ 40 $ 100 $ 3 $ 103 The following table provides a summary of the Company's consolidated restructuring liabilities and related activity for each type of exit costs: Employee Costs Facility Closure and Other Costs Total (Millions) Balance at December 31, 2015 $ 20 $ 10 $ 30 Provisions 19 11 30 Revisions to estimates (15 ) 15 — Payments (16 ) (29 ) (45 ) Balance at December 31, 2016 8 7 15 Provisions 31 16 47 Payments (22 ) (17 ) (39 ) Foreign currency 2 — 2 Balance at December 31, 2017 19 6 25 Federal-Mogul Acquisition 37 — 37 Provisions 90 25 115 Held for sale (2 ) — (2 ) Revisions to estimates (4 ) 1 (3 ) Payments (41 ) (27 ) (68 ) Foreign currency (1 ) — (1 ) Balance at December 31, 2018 $ 98 $ 5 $ 103 For the years ended December 31, 2018 , 2017 , and 2016 , restructuring charges, net, by segment, is as follows: Year Ended December 31 2018 2017 2016 (Millions) Clean Air $ 14 $ 23 $ 6 Ride Performance 48 16 13 Aftermarket 16 7 9 Powertrain (2 ) — — Motorparts 31 — — Other 5 1 2 $ 112 $ 47 $ 30 These amounts are classified in the consolidated statements of income as follows: Cost of sales $ 66 $ 41 $ 17 Engineering, research, and development 4 — 1 Selling, general, and administrative 40 6 12 Other expense 2 — — $ 112 $ 47 $ 30 For the years ended December 31, 2018 , 2017 , and 2016 , asset impairments, by segment, is as follows: Year Ended December 31 2018 2017 2016 (Millions) Clean Air $ — $ 2 $ 1 Ride Performance 6 1 2 Aftermarket — — 3 Other 2 — — $ 8 $ 3 $ 6 These amounts are classified in the consolidated statements of income as follows: Cost of sales $ 3 $ — $ — Selling, general, and administrative 2 — — Depreciation and amortization 3 3 4 Other expense — — 2 $ 8 $ 3 $ 6

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2018
Inventory Disclosure [Abstract]
Schedule of Inventory	At December 31, 2018 and 2017 , inventory by major classification was as follows: December 31 2018 2017 (Millions) Finished goods $ 1,116 $ 300 Work in process 562 268 Raw materials 457 178 Materials and supplies 110 74 Total inventories $ 2,245 $ 820

Property, Plant and Equipment_2

Property, Plant and Equipment—Net (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	The components of property, plant and equipment — net were as follows: December 31 Useful Life 2018 2017 (Millions) Land $ 293 $ 20 — Buildings and improvements 1,023 615 10 to 50 years Machinery, equipment and tooling 4,041 2,992 3 to 25 years Capitalized software 378 346 3 to 12 years Other, including construction in progress 568 396 — Property, plant and equipment , cost 6,303 4,369 Less: Accumulated depreciation and amortization (2,802 ) (2,678 ) Property, plant and equipment , net $ 3,501 $ 1,691

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets—Net (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	At December 31, 2018 and 2017 , goodwill consists of the following: December 31, 2018 Clean Air Segment Ride Performance Segment Aftermarket Segment Powertrain Motorparts Total (Millions) Gross carrying amount, January 1 $ 23 $ 156 $ 229 $ — $ — $ 408 Acquisition of Federal-Mogul (1) — — — 388 437 825 Currency translation (1 ) (1 ) — — — (2 ) Gross carrying amount, December 31 22 155 229 388 437 1,231 Accumulated impairment loss, January 1 $ — $ (140 ) $ (219 ) $ — $ — $ (359 ) Impairment — (3 ) — — — (3 ) Currency translation — — — — — — Accumulated impairment loss, December 31 — (143 ) (219 ) — — (362 ) Net carrying value, December 31 $ 22 $ 12 $ 10 $ 388 $ 437 $ 869 December 31, 2017 Clean Air Segment Ride Performance Segment Aftermarket Segment Powertrain Motorparts Total (Millions) Gross carrying amount, January 1 $ 21 $ 155 $ 229 $ — $ — $ 405 Currency translation 2 1 — — — 3 Gross carrying amount, December 31 23 156 229 — — 408 Accumulated impairment loss, January 1 $ — $ (133 ) $ (215 ) $ — $ — $ (348 ) Impairment — (7 ) (4 ) — — (11 ) Currency translation — — — — — — Accumulated impairment loss, December 31 — (140 ) (219 ) — — (359 ) Net carrying value, December 31 $ 23 $ 16 $ 10 $ — $ — $ 49 (1) The acquisition on October 1, 2018 of Federal-Mogul resulted in goodwill of $825 million . See Note 3, Acquisitions and Divestitures for additional information.
Schedule of Indefinite-Lived Intangible Assets	At December 31, 2018 and 2017 , the Company's intangible assets consist of the following: December 31, 2018 December 31, 2017 Useful Lives Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying (Millions) Definite-lived intangible assets: Customer relationships and platforms 10 years $ 964 $ (24 ) $ 940 $ — $ — $ — Customer contract 10 years 8 (5 ) 3 8 (5 ) 3 Patents 10 to 17 years 1 (1 ) — 1 (1 ) — Technology rights 10 to 30 years 98 (27 ) 71 29 (23 ) 6 Packaged kits know-how 10 years 36 (1 ) 35 — — — Licensing agreements 3 to 5 years 66 (3 ) 63 — — — Land use rights 28 to 46 years 44 (2 ) 42 15 (2 ) 13 1,217 (63 ) 1,154 53 (31 ) 22 Indefinite-lived intangible assets: Trade names and trademarks 365 — 365 — — — Total $ 1,582 $ (63 ) $ 1,519 $ 53 $ (31 ) $ 22
Schedule of Finite-Lived Intangible Assets	At December 31, 2018 and 2017 , the Company's intangible assets consist of the following: December 31, 2018 December 31, 2017 Useful Lives Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying (Millions) Definite-lived intangible assets: Customer relationships and platforms 10 years $ 964 $ (24 ) $ 940 $ — $ — $ — Customer contract 10 years 8 (5 ) 3 8 (5 ) 3 Patents 10 to 17 years 1 (1 ) — 1 (1 ) — Technology rights 10 to 30 years 98 (27 ) 71 29 (23 ) 6 Packaged kits know-how 10 years 36 (1 ) 35 — — — Licensing agreements 3 to 5 years 66 (3 ) 63 — — — Land use rights 28 to 46 years 44 (2 ) 42 15 (2 ) 13 1,217 (63 ) 1,154 53 (31 ) 22 Indefinite-lived intangible assets: Trade names and trademarks 365 — 365 — — — Total $ 1,582 $ (63 ) $ 1,519 $ 53 $ (31 ) $ 22
Finite-lived Intangible Assets Amortization Expense	The expected future amortization expense for the Company's definite-lived intangible assets is as follows: 2019 2020 2021 2022 2023 2024 and thereafter Total (Millions) Expected Amortization Expense $ 124 $ 125 $ 124 $ 119 $ 116 $ 546 $ 1,154

Investment in Nonconsolidated_2

Investment in Nonconsolidated Affiliates (Tables)	12 Months Ended
	Dec. 31, 2018
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	The Company’s ownership interests in affiliates, not including the acquisition of Federal-Mogul, accounted for under the equity method is as follows: Year Ended December 31 2018 2017 2016 Futaba Tenneco U.K. Ltd. (UK) — % — % 49.0 % Montagewerk Abgastechnik Emden GmbH (Germany) 50.0 % 50.0 % 50.0 % The Company sold its share of Futaba Tenneco U.K. Limited on April 28, 2017. Additionally, the Company acquired the following ownership interests accounted for under the equity method as a result of the acquisition of Federal-Mogul: Year Ended December 31 2018 Anqing TP Goetze Piston Ring Company Limited (China) 35.7 % Anqing TP Powder Metallurgy Co., Ltd (China) 20.0 % Dongsuh Federal-Mogul Industrial Co. Ltd. (Korea) 50.0 % Farloc Argentina SAIC Y F (Argentina) 23.9 % Federal-Mogul Powertrain Otomotiv A.S. (Turkey) 50.0 % Federal-Mogul TP Liner Europe Otomotiv Ltd. Sti. (Turkey) 25.0 % Federal-Mogul TP Liners, Inc. (USA) 46.0 % Frenos Hidraulicos Automotrices, S.A. de C.V. (Mexico) 49.0 % JURID do Brasil Sistemas Automotivos Ltda. (Brazil) 19.9 % KB Autosys Co., Ltd. (Korea) 33.6 % The following table represents amounts reflected in the Company’s consolidated financial statements related to nonconsolidated affiliates: Year Ended December 31 2018 2017 2016 (Millions) Equity earnings (losses) of nonconsolidated affiliates, net of tax $ 18 $ (1 ) $ — Cash dividends received from nonconsolidated affiliates $ 2 $ — $ — The following tables present summarized aggregated financial information of the Company’s nonconsolidated affiliates as of and for the period ended December 31, 2018 : Statements of Income Otomotiv A.S. Anqing TP Goetze Other Total (Millions) Sales $ 92 $ 41 $ 137 $ 270 Gross profit $ 23 $ 13 $ 33 $ 69 Income from continuing operations $ 26 $ 13 $ 10 $ 49 Net income $ 22 $ 12 $ 8 $ 42 Balance Sheets Otomotiv A.S. Anqing TP Goetze Other Total (Millions) Current assets $ 129 $ 164 $ 249 $ 542 Noncurrent assets $ 300 $ 132 $ 200 $ 632 Current liabilities $ 70 $ 40 $ 131 $ 241 Noncurrent liabilities $ 82 $ — $ 11 $ 93

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure Financial Instruments Additional Information [Abstract]
Summarization for Foreign Currency Forward Purchase and Sale Contracts	The following table summarizes by major currency the notional amounts for foreign currency forward purchase and sale contracts as of December 31, 2018 (all of which mature in 2019 ): Notional Amount (Millions) Canadian dollars —Sell (2 ) European euro —Purchase 1 —Sell (8 ) Polish zloty —Purchase 35 Mexican pesos —Purchase 211 U.S. dollars —Purchase 2 —Sell (11 )
Schedule of Derivative Instruments	The following table is a summary of the carrying value of derivative and non-derivative instruments designated as hedges as of December 31, 2018 : Carrying Value December 31 Balance sheets classification 2018 (Millions) Commodity price hedge contracts designated as cash flow hedges Accrued expenses and other current liabilities $(2) Foreign currency borrowings designated as net investment hedges Long-term debt $863 The following table represents the effects before reclassification into net income of derivative and non-derivative instruments designated as hedges in accumulated other comprehensive loss as of December 31, 2018: Amount of gain (loss) recognized in accumulated OCI or OCL (effective portion) December 31 2018 (Millions) Foreign currency borrowings designated as net investment hedges $(3)

Debt and Other Financing Arra_2

Debt and Other Financing Arrangements (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Summary of Long-term Debt Obligations	The aggregate maturities applicable to the long-term debt outstanding at December 31, 2018 : Aggregate Maturities (Millions) 2019 $ 175 2020 $ 114 2021 $ 154 2022 $ 692 2023 $ 1,249 A summary of the Company's long-term debt obligations at December 31, 2018 and 2017 , is set forth in the following table: 2018 2017 Principal Carrying Amount (1) Effective Interest Rate Principal Carrying Amount (1) Effective Interest Rate (Millions) Credit Facilities Revolver Borrowings Due 2023 $ — $ — — $ 244 $ 244 Term Loans LIBOR plus 1.75% Term Loan A due 2019 through 2023 (2) 1,700 1,691 6.160 % — — — LIBOR plus 2.75% Term Loan B due 2019 through 2025 (3) 1,700 1,629 8.880 % — — — Senior Tranche A Term Loan — — — 390 388 2.900 % Senior Unsecured Notes $225 million of 5.375% Senior Notes due 2024 (4) 225 222 5.609 % 225 222 5.609 % $500 million of 5.000% Senior Notes due 2026 (5) 500 493 5.219 % 500 492 5.219 % Senior Secured Notes (9) €415 million 4.875% Euro Fixed Rate Notes due 2022 (6) 476 496 3.599 % — — — €300 million of Euribor plus 4.875% Euro Floating Rate Notes due 2024 (7) 344 349 4.620 % — — — €350 million of 5.000% Euro Fixed Rate Notes due 2024 (8) 401 427 3.823 % — — — Other Debt, primarily foreign instruments 108 106 17 15 5,413 1,361 Less — maturities classified as current 73 3 Total long-term debt $ 5,340 $ 1,358 (1) Carrying amount is net of unamortized debt issuance costs and debt discounts or premiums. Total unamortized debt issuance costs were $90 million and $13 million as of December 31, 2018 and 2017 . Total unamortized debt (premium) discount, net was $(49) million and $2 million as of December 31, 2018 and 2017 . (2) Principal and interest payable in 19 consecutive quarterly installments beginning March 31, 2019, with $21 million being paid quarterly in the seven quarters, followed by $32 million paid in the subsequent four quarters followed by $43 million in the subsequent eight quarters and the remainder at maturity. (3) Principal and interest payable in 27 consecutive quarterly installments beginning March 31, 2019 with $4 million paid quarterly and the remainder at maturity. (4) Interest payable semiannually beginning on June 30, 2015 with principal due at maturity. (5) Interest payable semiannually beginning on January 31, 2017 with principal due at maturity. (6) Interest is payable quarterly on April 15 and October 15 of each year with principal due at maturity. (7) Interest accrues at the three-month EURIBOR rate (with 0% floor) plus 4.875% per annum and payable quarterly on January 15, April 15, July 15 and October 15. (8) Interest payable semiannually on January 15 and July 15 of each year beginning on July 17, 2017 with principal due at maturity. (9) Rank equally in right of payment to all indebtedness under the New Credit Facility (as subsequently defined). Interest expense associated with the amortization of the debt issuance costs and original issue discounts recognized in the Company's consolidated statements of income consists of the following: 2018 2017 2016 (Millions) Amortization of debt issuance fees $ 8 $ 4 $ 4
Summary of Short-term Debt Obligations	Weighted average interest rate on outstanding short-term borrowings at end of year 4.4 % 2.9 % (a) Includes borrowings under both committed credit facilities and uncommitted lines of credit and similar arrangements. The Company's short-term debt as of December 31, 2018 and 2017 is as follows: At December 31 2018 2017 (Millions) Maturities classified as current $ 73 $ 3 Short-term borrowings (a) 66 80 Bank overdrafts 14 20 Total short-term debt $ 153 $ 103
Financing Arrangements	Financing Arrangements Committed Credit Facilities (a) as of December 31, 2018 Term Commitments Borrowings Letters of (b) Available (Millions) Tenneco Inc. revolving credit agreement 2023 $ 1,500 $ — $ 24 $ 1,476 Tenneco Inc. Term Loan A 2023 1,700 1,700 — — Tenneco Inc. Term Loan B 2025 1,700 1,700 — — Subsidiaries’ credit agreements 2018-2028 154 51 3 100 $ 5,054 $ 3,451 $ 27 $ 1,576 (a) The Company generally is required to pay commitment fees on the unused portion of the total commitment. (b) Letters of credit reduce the available borrowings under the revolving credit agreement.
Schedule of Gain (Loss) on Securitizations or Asset-backed Financing Arrangements of Financial Assets Accounted for as Sale [Table Text Block]	Proceeds from the factoring of accounts receivable qualifying as sales and drafting programs, and expenses associated with these arrangements for the years ended December 31, 2018, 2017, and 2016 are as follows: Year Ended December 31 2018 2017 2016 (Millions) Proceeds from factoring qualifying as sales $ 3,390 $ 1,984 $ 1,770 Loss on sale of receivables $ 16 $ 5 $ 5 The amounts outstanding for these factoring and drafting arrangements as of December 31, 2018 and 2017 are as follows: As of December 31 2018 2017 (Millions) Accounts receivable outstanding and derecognized $ 1,011 $ 406 Deferred purchase price receivable $ 154 $ 114 these securitization programs at December 31, 2018 and 2017 are as follows: As of December 31 2018 2017 (Millions) Borrowings on securitization programs $ 6 $ 30

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value, by Balance Sheet Grouping	Estimated fair values of the Company's outstanding debt were: December 31, 2018 December 31, 2017 Fair value Carrying Fair Carrying Fair Long-term debt (including current maturities): (Millions) Term loans and senior notes Level 2 $ 5,307 $ 5,218 $ 1,346 $ 1,383 The following table presents assets and liabilities included in the Company's consolidated balance sheets as of December 31, 2018 and 2017 that are recognized at fair value on a recurring basis, and indicate the fair value hierarchy utilized to determine such fair value: December 31, 2018 December 31, 2017 Fair value Carrying Fair Carrying Fair Derivative instruments: (Millions) Equity swap agreement Level 2 $ 4 $ 4 $ 4 $ 4 Commodity contracts Level 2 $ (2 ) $ (2 ) $ — $ —

Accrued Expenses and Other Cu_2

Accrued Expenses and Other Current Liabilities (Tables)	12 Months Ended
	Dec. 31, 2018
Other Income and Expenses [Abstract]
Accrued Expenses and Other Current Liabilities	Accrued expenses and other current liabilities at December 31, 2018 and 2017 included the following: December 31 2018 2017 (Millions) Accrued rebates $ 189 $ 68 Product return reserves 95 16 Restructuring liabilities 91 16 Legal reserves 71 88 Non-income tax payable 67 52 Pension and postretirement benefits liability 50 14 Accrued freight 48 26 Liabilities held for sale 39 — Accrued warranty 39 23 Accrued interest 33 14 Accrued professional services 31 8 Environmental reserve 12 2 Other 236 97 $ 1,001 $ 424

Pension Plans, Postretirement_2

Pension Plans, Postretirement and Other Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2018
Amounts Recognized in Balance Sheets for Pension Plans and Postretirement Benefit Plan	The measurement date for all defined benefit plans is December 31. The following provides a reconciliation of the plans’ benefit obligations, plan assets, and funded status as of December 31, 2018 and 2017: Pension Plans Other Postretirement Benefits Plans U.S. Non-U.S. 2018 2017 2018 2017 2018 2017 (Millions) Change in benefit obligation: Benefit obligation, beginning of year $ 263 $ 272 $ 471 $ 438 $ 151 $ 143 Federal-Mogul acquisition 1,064 — 545 — 263 — Service cost 1 1 13 9 — — Interest cost 21 10 15 13 8 5 Settlement (1 ) (7 ) (13 ) (3 ) — — Curtailment — — — — (1 ) — Administrative expenses/taxes paid — — (3 ) (2 ) — — Plan amendments — — 2 — (66 ) — Actuarial (gain)/loss (12 ) 10 (16 ) (9 ) (24 ) 12 Benefits paid (34 ) (23 ) (22 ) (18 ) (15 ) (10 ) Medicare subsidies received — — — — 1 — Participants’ contributions — — 1 1 1 — Held for sale — — (16 ) — — — Currency rate conversion and other — — (31 ) 42 4 1 Benefit obligation, end of year 1,302 263 946 471 322 151 Change in plan assets: Fair value of plan assets, beginning of year 202 192 438 369 — — Federal-Mogul acquisition 943 — 81 — — — Settlement (1 ) (7 ) (14 ) (3 ) — — Actual return on plan assets (122 ) 22 (1 ) 42 — — Administrative expenses/taxes paid — — — (2 ) — — Employer contributions 6 18 21 14 13 10 Medicare subsidies received — — — — 1 — Participants’ contributions — — 1 1 1 — Benefits paid (33 ) (23 ) (25 ) (18 ) (15 ) (10 ) Held for sale — — (10 ) — — — Currency rate conversion and other — — (25 ) 35 — — Fair value of plan assets, end of year 995 202 466 438 — — Funded status of the plans $ (307 ) $ (61 ) $ (480 ) $ (33 ) $ (322 ) $ (151 )
Schedule of Amounts Recognized in Balance Sheet [Table Text Block]	Amounts recognized on the consolidated balance sheets consist of the following as of December 31, 2018 and 2017: Pension Plans Other Postretirement Benefits Plans U.S. Non-U.S. 2018 2017 2018 2017 2018 2017 (Millions) Noncurrent assets $ — $ — $ 33 $ 28 $ — $ — Current liabilities (5 ) (2 ) (17 ) (3 ) (28 ) (9 ) Noncurrent liabilities (a) (302 ) (59 ) (496 ) (58 ) (294 ) (142 ) $ (307 ) $ (61 ) $ (480 ) $ (33 ) $ (322 ) $ (151 ) (a) The "pension and postretirement benefits" line in the consolidated balance sheets includes $75 million and $9 million as of December 31, 2018 and 2017 of postemployment benefits which are not included in the table above.
Amounts Recognized in Accumulated Other Comprehensive Loss for Pension Benefits	Amounts recognized in accumulated other comprehensive loss for pension and postretirement benefits, inclusive of tax effects, consist of the following components as of December 31, 2018 and 2017: Pension Plans Other Postretirement Benefits Plans U.S. Non-U.S. 2018 2017 2018 2017 2018 2017 (Millions) Actuarial loss $ 255 $ 130 $ 80 $ 91 $ 31 $ 51 Prior service cost/(credit) — — 4 3 (73 ) — Total $ 255 $ 130 $ 84 $ 94 $ (42 ) $ 51
Projected Benefit Obligation Accumulated Benefit Obligation and Fair Value of Plan Assets for all Pension Plans	Information for defined benefit plans with projected benefit obligations in excess of plan assets: Pension Plans Other Postretirement Benefits Plans 2018 2017 U.S. Non-U.S. U.S. Non-U.S. 2018 2017 (Millions) Projected benefit obligation $ 1,302 $ 652 $ 263 $ 130 $ 322 $ 151 Fair value of plan assets $ 995 $ 138 $ 202 $ 69 $ — $ — Information for pension plans with accumulated benefit obligations in excess of plan assets: December 31, 2018 December 31, 2017 U.S. Non-U.S. U.S. Non-U.S. (Millions) Projected benefit obligation $ 1,302 $ 620 $ 263 $ 117 Accumulated benefit obligation $ 1,302 $ 606 $ 263 $ 112 Fair value of plan assets $ 995 $ 111 $ 202 $ 56
Components of Net Periodic Benefit Cost	Net periodic pension and postretirement benefits costs for the years 2018 , 2017 and 2016 , consist of the following components: Pension Plans Other Postretirement Benefits Plans U.S. Non-U.S. 2018 2017 2016 2018 2017 2016 2018 2017 2016 (Millions) Service cost $ 1 $ 1 $ 1 $ 14 $ 9 $ 8 $ — $ — $ — Interest cost 21 10 15 15 13 14 8 5 6 Expected return on plan assets (28 ) (14 ) (23 ) (18 ) (25 ) (20 ) — — — Curtailment loss — — — — — — 1 — — Settlement loss 1 8 72 3 1 — — — — Net amortization: Actuarial loss 5 5 8 6 9 7 5 4 5 Prior service cost (credit) — — — 1 1 1 — (1 ) (1 ) Net periodic costs $ — $ 10 $ 73 $ 21 $ 8 $ 10 $ 14 $ 8 $ 10
Assumptions Used in Accounting for Pension Plans	The following assumptions were used in the accounting for the pension and other postretirement benefits plans for the years of 2018 , 2017 , and 2016 : Pension Plans Other Postretirement Benefits Plans U.S. Non-U.S. 2018 2017 2016 2018 2017 2016 2018 2017 2016 Weighted-average assumptions used to determine benefit obligations: Discount rate 4.2 % 3.8 % 4.2 % 2.6 % 2.6 % 2.8 % 4.3 % 3.8 % 4.2 % Rate of compensation increase n/a n/a n/a — % 2.5 % 2.5 % n/a n/a n/a Weighted-average assumptions used to determine net periodic benefit cost: Discount rate 4.1 % 4.2 % 4.3 % 2.4 % 2.8 % 3.5 % 4.2 % 4.2 % 4.3 % Expected long-term return on plan assets 6.0 % 7.8 % 7.6 % 4.2 % 5.2 % 5.7 % n/a n/a n/a Rate of compensation increase n/a n/a n/a 2.9 % 2.5 % 2.7 % n/a n/a n/a
Components of Net Periodic Benefit Cost	Estimated amounts to be amortized from accumulated other comprehensive loss into net periodic benefit cost in the year ending December 31, 2019 based on December 31, 2018 plan measurements: 2019 Pension Plans Other Postretirement Benefits Plans U.S. Non-U.S (Millions) Net actuarial loss $ 5 $ 5 $ 4 Prior service cost — 1 (8 ) $ 5 $ 6 $ (4 )
Estimated Pension Plan Benefit Payments	Estimated future benefit payments are as follows: Pension Plans Other Postretirement Benefits Plans Year U.S. Non-U.S. (Millions) 2019 $ 100 $ 43 $ 28 2020 $ 99 $ 44 $ 28 2021 $ 99 $ 43 $ 27 2022 $ 101 $ 45 $ 26 2023 $ 100 $ 49 $ 26 2024-2028 $ 442 $ 243 $ 113
Pension Plan Assets Invested	Pension plan assets were invested in the following classes of securities: Percentage of Fair Market Value December 31, 2018 U.S. Non-U.S. Equity securities 62 % 32 % Fixed income securities 17 % 5 % Debt securities 11 % 43 % Insurance contracts — % 15 % Other 10 % 5 %
Plan Assets using Fair Value Hierarchy	The following table presents the Company’s defined benefit plan assets measured at fair value by asset class: Fair Value Level as of December 31, 2018 U.S. Non-U.S. Asset Category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (Millions) Investments with registered investment companies: Equity securities $ 323 $ — $ — $ 323 $ 1 $ — $ — $ 1 Fixed income securities 167 — — 167 21 — — 21 Real estate and other 41 — — 41 — — — — Equity securities 194 — — 194 14 55 — 69 Debt securities: Corporate and other — 18 — 18 8 — — 8 Government 12 21 — 33 2 147 — 149 Real Estate and other — — — — 1 4 — 5 Insurance contracts — — — — — — 71 71 Hedge funds — — 28 28 — — — — Cash and equivalents 33 — — 33 17 — — 17 Total $ 770 $ 39 $ 28 $ 837 $ 64 $ 206 $ 71 $ 341 Plan assets measured at net asset value Equity securities $ 104 $ 81 Government debt securities — 30 Corporate and other debt securities 54 14 Total plan assets measured at net asset value 158 125 Net plan assets $ 995 $ 466 Fair Value Level as of December 31, 2017 U.S. Non-U.S. Asset Category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (Millions) Equity securities $ 21 $ — $ — $ 21 $ 16 $ 101 $ — $ 117 Debt securities: Corporate and other — — — — 6 16 — 22 Government — — — — 2 112 — 114 Real Estate and other — — — — 1 6 — 7 Insurance contracts — — — — — 16 9 25 Cash and equivalents 2 — — 2 9 1 — 10 Total $ 23 $ — $ — $ 23 $ 34 $ 252 $ 9 $ 295 Plan assets measured at net asset value Equity securities $ 120 $ 97 Government debt securities — 32 Corporate and other debt securities 59 14 Total plan assets measured at net asset value 179 143 Net plan assets $ 202 $ 438
Changes in Fair Value of Level 3 Assets	The table below summarizes the changes in the fair value of the Level 3 assets: December 31, 2018 December 31, 2017 Level 3 Assets Level 3 Assets U.S. Non-U.S. U.S. Non-U.S. (Millions) (Millions) Balance at December 31 of the previous year $ — $ 9 $ — $ 9 Federal-Mogul acquisition 30 56 — — Net realized/unrealized gains (loss) (2 ) 1 — — Purchases and settlements, net — — — — Sales, net — — — — Transfers into (out) of Level 3 — 15 — — Held for sale — (10 ) Foreign currency exchange rate movements — — — — Ending Balance at December 31 $ 28 $ 71 $ — $ 9
Significant Concentrations of Risk	The following table contains information about significant concentrations of risk, including all individual assets that make up more than 5% of the total assets and any direct investments in Tenneco stock: Asset Category Fair Value Level Value Percentage of (Millions) 2018: Tenneco stock 1 $ 10 0.7 % 2017: Tenneco stock 1 $ 21 3.3 %
Schedule of Health Care Cost Trend Rates [Table Text Block]	The weighted-average assumed health care cost trend rate used in determining next year's postretirement health care benefits are as follows: Other Postretirement Benefits Plans 2018 2017 2016 Initial health care cost trend rate 6.9 % 6.8 % 7.0 % Ultimate health care cost trend rate 4.9 % 4.5 % 4.5 % Year ultimate health care cost trend rate reached 2027 2027 2026 The following table illustrates the sensitivity to a change in the assumed health care cost trend rate: Total Service and Interest Cost Postretirement Benefits Obligation (Millions) 100 basis point ("bp") increase in health care cost trend rate $ 1 $ 23 100 bp decrease in health care cost trend rate $ (1 ) $ (20 )

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income before Income Taxes and Noncontrolling Interests	The domestic and foreign components of the Company's earnings before income taxes and noncontrolling interests are as follows: Year Ended December 31, 2018 2017 2016 (Millions) U.S. income earnings (loss) before income taxes $ (138 ) $ (28 ) $ 52 Foreign earnings (loss) before income taxes 312 364 359 Earnings (loss) before income taxes and noncontrolling interests $ 174 $ 336 $ 411
Comparative Analysis of Components of Income Tax Expense	Following is a comparative analysis of the components of income tax expense (benefit): Year Ended December 31, 2018 2017 2016 (Millions) Current — U.S. federal $ 8 $ (23 ) $ (9 ) State and local 1 1 4 Foreign 119 101 85 128 79 80 Deferred — U.S. federal (35 ) 16 (95 ) State and local (5 ) (3 ) (1 ) Foreign (25 ) (21 ) 12 (65 ) (8 ) (84 ) Income tax expense (benefit) $ 63 $ 71 $ (4 )
Reconciliation of Income Taxes Computed at Statutory U.S. Federal Income Tax Rate to Income Tax Expense	Following is a reconciliation of income taxes computed at the statutory U.S. federal income tax rate ( 21% for 2018 and 35% for 2017 and 2016 ) to the income tax expense (benefit) reflected in the consolidated statements of income: Year Ended December 31, 2018 2017 2016 (Millions) Income tax expense computed at the statutory U.S. federal income tax rate $ 37 $ 117 $ 144 Increases (reductions) in income tax expense resulting from: Foreign income taxed at different rates 19 (48 ) (42 ) Transition Tax under Tax Cuts and Jobs Act ("TCJA") 11 43 — Re-measurement of Worldwide Deferred Taxes — 53 — State and local taxes on income, net of U.S. federal income tax benefit (6 ) (2 ) 3 Changes in valuation allowance for tax loss carryforwards and credits — (1 ) 18 Investment and R&D tax credits (12 ) (6 ) (6 ) Foreign earnings subject to U.S. federal income tax 9 (74 ) (101 ) Tax contingencies 1 (1 ) (7 ) Other 4 (10 ) (13 ) Income tax expense (benefit) $ 63 $ 71 $ (4 )
Components of Our Net Deferred Tax Assets	The components of the Company's net deferred tax assets were as follows: December 31, 2018 2017 (Millions) Deferred tax assets — Tax loss carryforwards: State $ 18 $ 19 Foreign 364 114 Tax credits 159 118 Postretirement benefits other than pensions 21 37 Pensions 158 24 Payroll accruals 24 18 Book over tax depreciation 68 (45 ) Other accruals 163 80 Valuation allowance (514 ) (163 ) Total deferred tax assets 461 202 Deferred tax liabilities — Amortization of intangibles 82 — Total deferred tax liabilities 82 — Net deferred tax assets $ 379 $ 202
Reconciliation of Deferred Taxes to Deferred Taxes Shown In Balance Sheet	December 31, 2018 2017 (Millions) Consolidated Balance Sheets: Non-current portion — deferred tax asset $ 467 $ 213 Non-current portion — deferred tax liability (88 ) (11 ) Net deferred tax assets $ 379 $ 202
Reconciliation of Our Uncertain Tax Positions	A reconciliation of the Company's uncertain tax positions is as follows: 2018 2017 2016 (Millions) Uncertain tax positions — Balance January 1 $ 112 $ 111 $ 123 Gross increases in tax positions due to acquisition 110 — — Gross increases in tax positions in current period 8 6 6 Gross increases in tax positions in prior period 7 2 2 Gross decreases in tax positions in prior period (1 ) (2 ) (5 ) Gross decreases — settlements (2 ) — — Gross decreases — statute of limitations expired (10 ) (5 ) (15 ) Balance December 31 $ 224 $ 112 $ 111
Tax Years Open to Examination in Primary Jurisdictions	As of December 31, 2018 , the Company's tax years open to examination in primary jurisdictions are as follows: Open To Tax United States 2003 Belgium 2016 Brazil 2014 China 2009 Germany 2009 Mexico 2013 Poland 2013 Spain 2000 United Kingdom 2015 Italy 2013 France 2009 India 1995

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Rental Payments for Operating Leases	Future minimum operating lease payments at December 31, 2018 are as follows: (Millions) 2019 $ 120 2020 100 2021 86 2022 68 2023 56 Beyond 2023 53 Total minimum lease payments $ 483
Schedule of Asset Retirement Obligations	The Company maintains ARO liabilities in the consolidated balance sheets as follows: December 31 2018 (Millions) Accrued expenses and other current liabilities $ 3 Deferred credits and other liabilities 12 $ 15 The following is a rollforward of the Company’s ARO liability for the year ended December 31, 2018 (in millions): December 31 2018 (Millions) Balance as of December 31, 2017 $ — Acquisition of Federal-Mogul 12 Liabilities incurred 3 Liabilities settled/adjustments — Balance as of December 31, 2018 $ 15
Warranty Accrual Table	Below is a table that shows the activity in the warranty accrual accounts: Year Ended December 31 2018 2017 2016 (Millions) Beginning balance $ 32 $ 27 $ 23 Acquisition of Federal-Mogul 17 — — Accruals related to product warranties 14 15 19 Reductions for payments made (18 ) (10 ) (15 ) Ending balance $ 45 $ 32 $ 27

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2018
Text Block [Abstract]
Stock Options Status and Activity	The following table reflects the status and activity for all options to purchase common stock for the period indicated: Year Ended December 31, 2018 Shares Weighted Avg. Weighted Avg. Aggregate (Millions) Options outstanding, January 1, 2018 318,016 $ 46.18 2.3 $ 5 Granted — — Exercised (21,823 ) 29.79 Forfeited/expired (2,196 ) 55.50 Options outstanding, December 31, 2018 293,997 46.89 1.4 $ —
Nonvested Restricted Shares	The following table reflects the status for all nonvested restricted stock, share-settled RSUs and PSUs for the period indicated: Restricted Stock Share-Settled RSUs PSUs Shares Weighted Avg. Units Weighted Avg. Units Weighted Avg. Nonvested balance at January 1, 2018 410,251 $ 53.36 — $ — — $ — Granted 19,727 54.19 467,358 48.48 248,928 49.32 Vested (237,342 ) 51.17 (192 ) 55.04 — — Forfeited (14,086 ) 60.87 (26,763 ) 55.04 (21,879 ) 50.75 Nonvested balance at December 31, 2018 178,550 55.46 440,403 47.99 227,049 49.18

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Schedule of Stock by Class	Total common stock outstanding and changes in common stock issued are as follows: Class A Common Stock Class B Common Stock Year Ended December 31 Year Ended December 31 2018 2017 2016 2018 Shares issued, beginning balance 66,033,509 65,891,930 65,067,132 — Share issuances (1) 5,651,177 — — 23,793,669 Issuance pursuant to benefit plans 19,919 34,760 292,514 — Restricted stock forfeited and withheld for taxes (51,049 ) (126,682 ) — — Stock options exercised 21,823 233,501 532,284 — Shares issued, ending balance 71,675,379 66,033,509 65,891,930 23,793,669 Treasury stock 14,592,888 14,592,888 11,655,938 — Total shares outstanding 57,082,491 51,440,621 54,235,992 23,793,669 (1) Represents an aggregate of 29,444,846 shares of Common Stock delivered to AEP as the Stock Consideration related to Federal-Mogul Acquisition. See Note 3, Acquisitions and Divestitures for additional information.

Changes in Accumulated Other _2

Changes in Accumulated Other Comprehensive Income (Loss) by Component (Tables)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following represents the Company’s changes in accumulated other comprehensive income (loss) by component for the years ended December 31, 2018 , 2017, and 2016: Year Ended December 31 2018 2017 2016 (In millions) Foreign currency translation adjustment: Balance at beginning of year $ (263 ) $ (367 ) $ (315 ) Other comprehensive income (loss) before reclassifications (134 ) 104 (49 ) Income tax provision (benefit) 2 — (3 ) Other comprehensive income (loss), net of tax (132 ) 104 (52 ) Balance at end of period (395 ) (263 ) (367 ) Pension and postretirement benefits: Balance at beginning of year (275 ) (292 ) (343 ) Other comprehensive income (loss) before reclassifications (47 ) 2 61 Reclassification to earnings 22 26 19 Other comprehensive income (loss) before tax (25 ) 28 80 Income tax provision (benefit) 3 (11 ) (29 ) Other comprehensive income (loss), net of tax (22 ) 17 51 Balance at end of period $ (297 ) $ (275 ) $ (292 ) Other comprehensive income (loss) attributable to noncontrolling interests, net of tax $ (2 ) $ 2 $ (4 )

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Summary of Earnings Per Share of Common Stock	Earnings per share of common stock outstanding were computed as follows: Year Ended December 31 2018 2017 2016 (Millions Except Share and Per Share Amounts) Net income attributable to Tenneco Inc. $ 55 $ 198 $ 347 Basic earnings per share — Average shares of common stock outstanding 58,625,087 52,796,184 55,939,135 Earnings per average share of common stock $ 0.93 $ 3.75 $ 6.20 Diluted earnings per share — Average shares of common stock outstanding 58,625,087 52,796,184 55,939,135 Effect of dilutive securities: Restricted stock and RSUs 93,546 111,062 175,513 Stock options 40,099 119,665 292,788 Average shares of common stock outstanding including dilutive securities 58,758,732 53,026,911 56,407,436 Earnings per average share of common stock $ 0.93 $ 3.73 $ 6.15

Segment and Geographic Area I_2

Segment and Geographic Area Information (Tables)	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Segment Information	Segment results for 2018 , 2017 and 2016 are as follows: Reportable Segments Clean Air Ride Performance Aftermarket Powertrain Motorparts Total Other Reclass & Elims Total (Millions) At December 31, 2018, and for the Year Ended Revenues from external customers $ 6,707 $ 1,949 $ 1,221 $ 1,112 $ 774 $ 11,763 $ — $ — $ 11,763 Intersegment revenues — 22 — 40 10 72 — (72 ) — EBITDA including noncontrolling interests 597 66 169 92 (39 ) 885 (234 ) — 651 At December 31, 2017, and for the Year Ended Revenues from external customers $ 6,216 $ 1,807 $ 1,251 $ — $ — $ 9,274 $ — $ — $ 9,274 Intersegment revenues — 22 — — — 22 — (22 ) — EBITDA including noncontrolling interests 562 124 193 — — 879 (245 ) — 634 At December 31, 2016, and for the Year Ended Revenues from external customers $ 5,764 $ 1,593 $ 1,240 $ — $ — $ 8,597 $ — $ — $ 8,597 Intersegment revenues — 26 — — — 26 — (26 ) — EBITDA including noncontrolling interests 561 153 207 — — 921 (229 ) — 692 Segment EBITDA including noncontrolling interests and the reconciliation to earnings before interest expense, income taxes, and noncontrolling interests are as follow: Year Ended December 31 2018 2017 2016 (Millions) EBITDA including noncontrolling interests by Segments: Clean Air $ 597 $ 562 $ 561 Ride Performance 66 124 153 Aftermarket 169 193 207 Powertrain 92 — — Motorparts (39 ) — — Other (234 ) (245 ) (229 ) Total EBITDA including noncontrolling interests 651 634 692 Less: Depreciation and amortization (345 ) (226 ) (213 ) Earnings before interest expense, income taxes, and noncontrolling interests $ 306 $ 408 $ 479 Less: Interest expense 132 72 68 Less: Income tax expense (benefit) 63 71 (4 ) Net income $ 111 $ 265 $ 415
Revenue Percent by Major Customers	The following customers accounted for 10% or more of the Company's net sales in the last three years. The net sales to both customers were across all segments. Customer 2018 2017 2016 General Motors Company 12 % 14 % 17 % Ford Motor Company 12 % 13 % 13 %
Geographic Information Table	Revenues from external customers (b) Long-lived assets (c) Year Ended December 31 December 31 2018 2017 2016 2018 2017 (Millions) United States $ 4,488 $ 3,632 $ 3,512 $ 1,341 $ 655 China 1,553 1,283 1,186 687 280 Germany 1,212 798 764 543 144 Poland 731 488 385 319 219 United Kingdom 499 482 387 116 48 Mexico 543 416 352 239 75 India 316 216 159 167 46 Turkey 7 9 9 276 — Other Foreign (a) 2,414 1,950 1,843 687 298 Reclass & Elims — — — (107 ) — Consolidated $ 11,763 $ 9,274 $ 8,597 $ 4,268 $ 1,765 (a) Revenues from external customers and long-lived assets for individual foreign countries other than China, Germany, Poland, United Kingdom, Mexico, India, and Turkey are not material. (b) Revenues are attributed to countries based on location of the shipper. (c) Long-lived assets include all long-term assets except goodwill, intangibles and deferred tax assets.
Disaggregation of Revenue	Revenue from contracts with customers is disaggregated by product lines, as it depicts the nature and amount of the Company’s revenue that is aligned with the Company's key growth strategies. In the following table, revenue is disaggregated accordingly: Reportable Segments By Customer Type Clean Air Ride Performance Aftermarket Powertrain Motorparts Total (Millions) Year Ended December 31, 2018 OE - Substrate $ 2,500 $ — $ — $ — $ — $ 2,500 OE - Value add 4,207 1,949 — 1,112 — 7,268 Aftermarket — — 1,221 — 774 1,995 Total $ 6,707 $ 1,949 $ 1,221 $ 1,112 $ 774 $ 11,763 Year Ended December 31, 2017 OE - Substrate $ 2,187 $ — $ — $ — $ — $ 2,187 OE - Value add 4,029 1,807 — — — 5,836 Aftermarket — — 1,251 — — 1,251 Total $ 6,216 $ 1,807 $ 1,251 $ — $ — $ 9,274 Year Ended December 31, 2016 OE - Substrate $ 2,028 $ — $ — $ — $ — $ 2,028 OE - Value add 3,736 1,593 — — — 5,329 Aftermarket — — 1,240 — — 1,240 Total $ 5,764 $ 1,593 $ 1,240 $ — $ — $ 8,597 Reportable Segments By Geography Clean Air Ride Performance Aftermarket Powertrain Motorparts Total (Millions) Year Ended December 31, 2018 North America $ 2,981 $ 721 $ 758 $ 386 $ 408 $ 5,254 EMEA 2,415 801 399 498 290 4,403 ROW 1,311 427 64 228 76 2,106 Total $ 6,707 $ 1,949 $ 1,221 $ 1,112 $ 774 $ 11,763 Year Ended December 31, 2017 North America $ 2,866 $ 674 $ 786 $ — $ — $ 4,326 EMEA 2,143 736 404 — — 3,283 ROW 1,207 397 61 — — 1,665 Total $ 6,216 $ 1,807 $ 1,251 $ — $ — $ 9,274 Year Ended December 31, 2016 North America $ 2,767 $ 652 $ 818 $ — $ — $ 4,237 EMEA 1,872 604 370 — — 2,846 ROW 1,125 337 52 — — 1,514 Total $ 5,764 $ 1,593 $ 1,240 $ — $ — $ 8,597 The following table shows the asset expenditure information by reportable segments: Year Ended December 31, 2018 Clean Air Ride Performance Aftermarket Powertrain Motorparts Other unallocated assets Total (Millions) Prior year payable on assets $ 33 $ 22 $ 4 $ — $ — $ — $ 59 Asset additions 202 121 38 81 43 56 541 Less: Current year payable on assets (38 ) (23 ) (7 ) (23 ) (2 ) — (93 ) Cash payments for property, plant, and equipment $ 197 $ 120 $ 35 $ 58 $ 41 $ 56 $ 507 Year Ended December 31, 2017 Clean Air Ride Performance Aftermarket Powertrain Motorparts Other unallocated assets Total (Millions) Prior year payable on assets $ 43 $ 19 $ 5 $ — $ — $ 1 $ 68 Asset additions 212 145 27 — — 26 410 Less: Current year payable on assets (33 ) (22 ) (4 ) — — — (59 ) Cash payments for property, plant, and equipment $ 222 $ 142 $ 28 $ — $ — $ 27 $ 419 Year Ended December 31, 2016 Clean Air Ride Performance Aftermarket Powertrain Motorparts Other unallocated assets Total (Millions) Prior year payable on assets $ 35 $ 11 $ 4 $ — $ — $ — $ 50 Asset additions 217 96 26 — — 24 363 Less: Current year payable on assets (43 ) (19 ) (5 ) — — (1 ) (68 ) Cash payments for property, plant, and equipment $ 209 $ 88 $ 25 $ — $ — $ 23 $ 345

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2018
Related Party Transactions [Abstract]
Schedule of Related Party Transactions	The following table is a summary of net sales to the Company's related parties for the year ended December 31, 2018: Year Ended December 31 2018 Net Sales: (Millions) Icahn Automotive Group LLC $ 52 Anqing TP Powder Metallurgy Company Limited $ 1 Dongsuh Federal-Mogul Industrial Co., Ltd. $ 1 Federal-Mogul Powertrain Otomotiv A.S. $ 11 Federal-Mogul TP Liners, Inc. $ 2 Montagewerk Abgastechnik Emden GmbH $ 1 The following table is a summary of purchases made by the Company from its related parties for the year ended December 31, 2018: Year Ended December 31 2018 Purchases: (Millions) Anqing TP Goetze Piston Ring Company Limited $ 16 Anqing TP Powder Metallurgy Company Limited $ 1 Dongsuh Federal-Mogul Industrial Co., Ltd. $ 2 Federal-Mogul Powertrain Otomotiv A.S. $ 53 Federal-Mogul TP Liner Europe Otomotiv Ltd. Sti. $ 13 Federal-Mogul TP Liners, Inc. $ 14 The following table is a summary of royalty and other income from the Company's related parties for the year ended December 31, 2018: Year Ended December 31 2018 Royalty and Other Income: (Millions) Icahn Automotive Group LLC $ 1 Federal-Mogul Powertrain Otomotiv A.S. $ 4 Federal-Mogul TP Liners, Inc. $ 4 The following table is a summary of amounts due to and from the Company's related parties as of December 31, 2018: December 31 2018 Receivables: (Millions) Icahn Automotive Group LLC $ 60 Anqing TP Goetze Piston Ring Company Limited $ 1 Anqing TP Powder Metallurgy Company Limited $ 1 Dongsuh Federal-Mogul Industrial Co., Ltd. $ 1 Federal-Mogul Powertrain Otomotiv A.S. $ 9 Federal-Mogul TP Liners, Inc. $ 2 Payables and accruals: Icahn Automotive Group LLC $ 12 Anqing TP Goetze Piston Ring Company Limited $ 22 Anqing TP Powder Metallurgy Company Limited $ 1 Dongsuh Federal-Mogul Industrial Co., Ltd. $ 2 Federal-Mogul Powertrain Otomotiv A.S. $ 16 Federal-Mogul TP Liner Europe Otomotiv Ltd. Sti. $ 1 Federal-Mogul TP Liners, Inc. $ 7

Quarterly Financial Data (Una_2

Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data	The following tables present the unaudited quarterly results of operations for the eight quarters ended December 31, 2018 . This quarterly information has been prepared on the same basis as the consolidated financial statements and, in the opinion of management, reflects all adjustments necessary for the fair statement of the information for the periods presented. This data should be read in conjunction with the consolidated financial statements and related disclosures. Operating results for any quarter apply to that quarter only and are not necessarily indicative of results for any future period. The amounts below reflect the revisions as discussed in Note 2, Summary of Significant Accounting Policies and the 2018 amounts will be revised for interim periods in future filings and were not material to the previously issued financial statements. Net sales and operating revenues Cost of sales (exclusive of depreciation and amortization) As Reported Revision As Revised As Reported Revision As Revised Quarter (Millions) (Millions) 2018 1st $ 2,574 $ 7 $ 2,581 $ 2,198 $ 4 $ 2,202 2nd 2,537 (4 ) 2,533 2,159 (2 ) 2,157 3rd 2,372 (1 ) 2,371 2,014 — 2,014 4th 4,278 3,698 Full Year $ 11,763 $ 10,071 2017 1st $ 2,292 $ 6 $ 2,298 $ 1,929 $ 3 $ 1,932 2nd 2,317 (3 ) 2,314 1,949 — 1,949 3rd 2,274 (1 ) 2,273 1,911 1 1,912 4th 2,391 (2 ) 2,389 2,020 (1 ) 2,019 Full Year $ 9,274 $ — $ 9,274 $ 7,809 $ 3 $ 7,812 Earnings before interest expense, income taxes, and noncontrolling interests Net Income As Reported Reclass As Reclassified Revision As Revised As Reported Revision As Revised Quarter (Millions) (Millions) 2018 1st $ 117 $ — $ 117 $ 2 $ 119 $ 58 $ 2 $ 60 2nd 113 — 113 (4 ) 109 50 (3 ) 47 3rd 104 — 104 5 109 54 3 57 4th (31 ) (109 ) Full Year $ 306 $ 55 2017 1st $ 121 — $ 121 $ 1 $ 122 $ 59 $ 2 $ 61 2nd 27 (1 ) 26 (3 ) 23 (3 ) (2 ) (5 ) 3rd 134 — 134 (3 ) 131 83 (3 ) 80 4th 135 — 135 (3 ) 132 68 (6 ) 62 Full Year $ 417 $ (1 ) $ 416 $ (8 ) $ 408 $ 207 $ (9 ) $ 198 Basic earnings (loss) per share of common stock (1) Diluted earnings (loss) per share of common stock (1) As Reported Revision As Revised As Reported Revision As Revised Quarter (Millions) (Millions) 2018 1st $ 1.13 $ 0.04 $ 1.17 $ 1.13 $ 0.04 $ 1.17 2nd 0.98 (0.06 ) 0.92 0.98 (0.06 ) 0.92 3rd 1.05 0.06 1.11 1.05 0.06 1.11 4th (1.35 ) (1.35 ) Full Year $ 0.93 $ 0.93 2017 1st $ 1.10 $ 0.03 $ 1.13 $ 1.09 $ 0.03 $ 1.12 2nd (0.05 ) (0.04 ) (0.09 ) (0.05 ) (0.04 ) (0.09 ) 3rd 1.57 (0.04 ) 1.53 1.57 (0.04 ) 1.53 4th 1.33 (0.14 ) 1.19 1.33 (0.14 ) 1.19 Full Year $ 3.93 $ (0.18 ) $ 3.75 $ 3.91 $ (0.18 ) $ 3.73 (1) The sum of the quarters may not equal the total of the respective year’s earnings per share on either a basic or diluted basis due to changes in the weighted average shares outstanding throughout the year.

Supplemental Guarantor Conden_2

Supplemental Guarantor Condensed Consolidating Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Statement of Comprehensive Income (Loss)	STATEMENT OF COMPREHENSIVE INCOME (LOSS) Year Ended December 31, 2018 Guarantor Nonguarantor Tenneco Inc. Reclass Consolidated (Millions) Revenues Net sales and operating revenues: External $ 4,678 $ 7,085 $ — $ — $ 11,763 Affiliated companies 606 725 — (1,331 ) — 5,284 7,810 — (1,331 ) 11,763 Costs and expenses Cost of sales (exclusive of depreciation and amortization) 4,570 6,845 (13 ) (1,331 ) 10,071 Selling, general, and administrative 384 377 33 — 794 Depreciation and amortization 153 192 — — 345 Engineering, research, and development 95 109 — — 204 Goodwill impairment charge 3 — — — 3 5,205 7,523 20 (1,331 ) 11,417 Equity earnings of nonconsolidated affiliates — — — — — Other expense (income) Loss on sale of receivables 8 8 — — 16 Non-service postretirement benefit costs 13 9 (2 ) — 20 Loss on extinguishment of debt — — 10 — 10 Equity in (earnings) losses of nonconsolidated affiliates, net of tax — (18 ) — — (18 ) Other (income) expense, net 29 (36 ) 1 18 12 50 (37 ) 9 18 40 Earnings (loss) before interest expense, income taxes and noncontrolling interests 29 324 (29 ) (18 ) 306 Interest expense: External, net of interest capitalized 26 12 94 — 132 Affiliated companies, net of interest income (14 ) 7 7 — — Earnings (loss) before income taxes and noncontrolling interests 17 305 (130 ) (18 ) 174 Income tax expense (benefit) (30 ) 93 — — 63 Equity in net income from affiliated companies 135 — 184 (319 ) — Net income 182 212 54 (337 ) 111 Less: Net income attributable to noncontrolling interests — 56 — — 56 Net income attributable to Tenneco Inc. $ 182 $ 156 $ 54 $ (337 ) $ 55 Comprehensive income (loss) attributable to Tenneco Inc. $ 159 $ 24 $ (31 ) $ (251 ) $ (99 ) STATEMENT OF COMPREHENSIVE INCOME (LOSS) Year Ended December 31, 2017 Guarantor Nonguarantor Tenneco Inc. Reclass Consolidated (Millions) Revenues Net sales and operating revenues: External $ 3,889 $ 5,385 $ — $ — $ 9,274 Affiliated companies 540 640 — (1,180 ) — 4,429 6,025 — (1,180 ) 9,274 Costs and expenses Cost of sales (exclusive of depreciation and amortization) 3,771 5,221 — (1,180 ) 7,812 Selling, general, and administrative 352 286 — — 638 Depreciation and amortization 90 136 — — 226 Engineering, research, and development 77 81 — — 158 Goodwill impairment charge — 11 — — 11 4,290 5,735 — (1,180 ) 8,845 Other expense (income) Loss on sale of receivables 2 3 — — 5 Non-service postretirement benefit costs 18 (2 ) — — 16 Loss on extinguishment of debt 1 — — — 1 Equity in losses of nonconsolidated affiliates, net of tax — 1 — — 1 Other (income) expense, net (2 ) (53 ) — 53 (2 ) 19 (51 ) — 53 21 Earnings (loss) before interest expense, income taxes, noncontrolling interests and equity in net income from affiliated companies 120 341 — (53 ) 408 Interest expense: External, net of interest capitalized 18 5 49 — 72 Affiliated companies, net of interest income (15 ) 6 9 — — Earnings (loss) before income taxes, noncontrolling interests and equity in net income from affiliated companies 117 330 (58 ) (53 ) 336 Income tax (benefit) expense (10 ) 81 — — 71 Equity in net income from affiliated companies 149 — 265 (414 ) — Net income 276 249 207 (467 ) 265 Less: Net income attributable to noncontrolling interests — 67 — — 67 Net income attributable to Tenneco Inc. $ 276 $ 182 $ 207 $ (467 ) $ 198 Comprehensive income attributable to Tenneco Inc. $ 282 $ 173 $ 331 $ (467 ) $ 319 STATEMENT OF COMPREHENSIVE INCOME (LOSS) Year Ended December 31, 2016 Guarantor Nonguarantor Tenneco Inc. Reclass Consolidated (Millions) Revenues Net sales and operating revenues: External $ 3,863 $ 4,734 $ — $ — $ 8,597 Affiliated companies 526 747 — (1,273 ) — 4,389 5,481 — (1,273 ) 8,597 Costs and expenses Cost of sales (exclusive of depreciation and amortization) 3,724 4,675 — (1,273 ) 7,126 Selling, general, and administrative 235 278 1 — 514 Depreciation and amortization 87 126 — — 213 Engineering, research, and development 76 77 — — 153 4,122 5,156 1 (1,273 ) 8,006 Other expense (income) Loss on sale of receivables 2 3 — — 5 Non-service postretirement benefit costs 83 1 — — 84 Loss on extinguishment of debt 24 — — — 24 Other (income) expense, net 8 (24 ) — 15 (1 ) 117 (20 ) — 15 112 Earnings (loss) before interest expense, income taxes, noncontrolling interests and equity in net income from affiliated companies 150 345 (1 ) (15 ) 479 Interest expense: External, net of interest capitalized (26 ) 4 90 — 68 Affiliated companies, net of interest income (12 ) 7 5 — — Earnings (loss) before income taxes, noncontrolling interests and equity in net income from affiliated companies 188 334 (96 ) (15 ) 411 Income tax (income) expense (101 ) 97 — — (4 ) Equity in net income from affiliated companies 166 — 452 (618 ) — Net income 455 237 356 (633 ) 415 Less: Net income attributable to noncontrolling interests — 68 — — 68 Net income attributable to Tenneco Inc. $ 455 $ 169 $ 356 $ (633 ) $ 347 Comprehensive income attributable to Tenneco Inc. $ 464 $ 159 $ 356 $ (633 ) $ 346
Balance Sheet	BALANCE SHEETS December 31, 2018 Guarantor Nonguarantor Tenneco Inc. Reclass Consolidated (Millions) ASSETS Current assets: Cash and cash equivalents $ 329 $ 364 $ 4 $ — $ 697 Restricted cash 5 — — 5 Receivables, net 943 1,629 — — 2,572 Inventories, net 958 1,287 — — 2,245 Prepayments and other current assets 254 311 25 — 590 Total current assets 2,484 3,596 29 — 6,109 Property, plant and equipment, net 1,131 2,361 9 — 3,501 Investment in affiliated companies 1,421 — 4,856 (6,277 ) — Long-term receivables, net 9 1 — — 10 Goodwill 263 383 223 — 869 Intangibles, net 1,007 510 2 — 1,519 Investments in nonconsolidated affiliates 43 501 — — 544 Deferred income taxes 255 200 12 — 467 Other assets 48 180 — (15 ) 213 Total assets $ 6,661 $ 7,732 $ 5,131 $ (6,292 ) $ 13,232 LIABILITIES AND SHAREHOLDERS’ EQUITY Current liabilities: Short-term debt, including current maturities of long-term debt $ 1 $ 152 $ — $ — $ 153 Accounts payable 858 1,894 7 — 2,759 Accrued compensation and employee benefits 88 255 — — 343 Accrued income taxes — 52 27 (15 ) 64 Accrued expenses and other current liabilities 436 488 77 — 1,001 Total current liabilities 1,383 2,841 111 (15 ) 4,320 Long-term debt 3 32 5,305 — 5,340 Intercompany due to (due from) 2,726 (215 ) (2,511 ) — — Deferred income taxes — 88 — — 88 Pension, postretirement benefits and other liabilities 225 705 500 — 1,430 Commitments and contingencies Total liabilities 4,337 3,451 3,405 (15 ) 11,178 Redeemable noncontrolling interests — 138 — — 138 Tenneco Inc. shareholders’ equity 2,324 3,953 1,726 (6,277 ) 1,726 Noncontrolling interests — 190 — — 190 Total equity 2,324 4,143 1,726 (6,277 ) 1,916 Total liabilities, redeemable noncontrolling interests and equity $ 6,661 $ 7,732 $ 5,131 $ (6,292 ) $ 13,232 BALANCE SHEETS December 31, 2017 Guarantor Nonguarantor Tenneco Inc. Reclass Consolidated (Millions) ASSETS Current assets: Cash and cash equivalents $ 7 $ 308 $ — $ — $ 315 Restricted cash — 3 — — 3 Receivables, net 208 1,113 — — 1,321 Inventories, net 359 461 — — 820 Prepayments and other current assets 99 189 — — 288 Total current assets 673 2,074 — — 2,747 Property, plant and equipment, net 594 1,097 — — 1,691 Investment in affiliated companies 1,385 — 1,198 (2,583 ) — Long-term receivables, net 8 1 — — 9 Goodwill 22 27 — — 49 Intangibles, net 5 17 — — 22 Investments in nonconsolidated affiliates 1 1 — — 2 Deferred income taxes 169 44 — — 213 Other assets 12 51 — — 63 Total assets $ 2,869 $ 3,312 $ 1,198 $ (2,583 ) $ 4,796 LIABILITIES AND SHAREHOLDERS' EQUITY Current liabilities: Short-term debt, including current maturities of long-term debt $ — $ 103 $ — $ — $ 103 Accounts payable 496 1,086 — — 1,582 Accrued compensation and employee benefits 24 117 — — 141 Accrued income taxes 2 25 — — 27 Accrued expenses and other current liabilities 208 204 12 — 424 Total current liabilities 730 1,535 12 — 2,277 Long-term debt 632 12 714 — 1,358 Intercompany due to (due from) 561 (397 ) (164 ) — — Deferred income taxes — 11 — — 11 Postretirement benefits and other liabilities 299 127 — — 426 Commitments and contingencies Total liabilities 2,222 1,288 562 — 4,072 Redeemable noncontrolling interests — 42 — — 42 Tenneco Inc. shareholders’ equity 647 1,936 636 (2,583 ) 636 Noncontrolling interests — 46 — — 46 Total equity 647 1,982 636 (2,583 ) 682 Total liabilities, redeemable noncontrolling interests and equity $ 2,869 $ 3,312 $ 1,198 $ (2,583 ) $ 4,796
Statement of Cash Flows	STATEMENT OF CASH FLOWS Year Ended December 31, 2018 Guarantor Nonguarantor Tenneco Inc. Reclass Consolidated (Millions) Operating Activities Net cash provided by (used in) operating activities $ 248 $ 246 $ (36 ) $ (19 ) $ 439 Investing Activities Federal-Mogul acquisition 151 124 (2,469 ) — — (2,194 ) Proceeds from sale of assets 2 7 — — 9 Cash payments for property, plant and equipment (196 ) (311 ) — — (507 ) Proceeds from deferred purchase price of factored receivables — 174 — — 174 Other 1 3 — — 4 Net cash used in investing activities (42 ) (3 ) (2,469 ) — (2,514 ) Financing Activities Cash dividends — — (59 ) — (59 ) Repayment of term loans and notes (391 ) (62 ) — — (453 ) Proceeds from term loans and notes — 26 3,400 — 3,426 Debt issuance cost on long-term debt (15 ) — (80 ) — (95 ) Tax impact from stock-based compensation — — — — — Issuance (repurchase) of common shares — — (1 ) — (1 ) Decrease in bank overdrafts — (5 ) — — (5 ) Borrowings on revolving lines of credit 4,411 114 624 — 5,149 Payments on revolving lines of credit (4,654 ) (127 ) (624 ) — (5,405 ) Net increase (decrease) in short-term borrowings secured by accounts receivable — (30 ) — — (30 ) Intercompany dividends and net (decrease) increase in intercompany obligations 765 (33 ) (751 ) 19 — Distribution to noncontrolling interests partners — (51 ) — — (51 ) Net cash (used in) provided by financing activities 116 (168 ) 2,509 19 2,476 Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash — (17 ) — — (17 ) Increase in cash, cash equivalents and restricted cash 322 58 4 — 384 Cash, cash equivalents and restricted cash, January 1 7 311 — — 318 Cash, cash equivalents and restricted cash, December 31 $ 329 $ 369 $ 4 $ — $ 702 STATEMENT OF CASH FLOWS Year Ended December 31, 2017 Guarantor Nonguarantor Tenneco Inc. Reclass Consolidated (Millions) Operating Activities Net cash provided by (used in) operating activities $ 284 $ 290 $ (4 ) $ (53 ) $ 517 Investing Activities Proceeds from sale of assets 3 5 — — 8 Proceeds from sale of equity interest — 9 9 Cash payments for property, plant and equipment (164 ) (255 ) — — (419 ) Proceeds from deferred purchase price of factored receivables — 112 — — 112 Other (4 ) (6 ) — — (10 ) Net cash used in investing activities (165 ) (135 ) — — (300 ) Financing Activities Cash dividends — — (53 ) — (53 ) Payments of term loans and notes (10 ) (20 ) (6 ) — (36 ) Proceeds from term loans and notes 136 24 — — 160 Debt issuance cost on long-term debt (8 ) — — — (8 ) Purchase of common stock under the share repurchase program — — (169 ) — (169 ) Issuance of common shares — — (1 ) — (1 ) Decrease in bank overdrafts — (7 ) — — (7 ) Borrowings on revolving lines of credits 3,956 48 2,660 — 6,664 Payments on revolving lines of credits (3,710 ) (49 ) (2,978 ) (6,737 ) Intercompany dividends and net (decrease) increase in intercompany obligations (485 ) (119 ) 551 53 — Distribution to noncontrolling interests partners — (64 ) — — (64 ) Net cash (used in) provided by financing activities (121 ) (187 ) 4 53 (251 ) Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash — 3 — — 3 Decrease in cash, cash equivalents and restricted cash (2 ) (29 ) — — (31 ) Cash, cash equivalents and restricted cash, January 1 9 340 — — 349 Cash, cash equivalents and restricted cash, December 31 $ 7 $ 311 $ — $ — $ 318 STATEMENT OF CASH FLOWS Year Ended December 31, 2016 Guarantor Nonguarantor Tenneco Inc. Reclass Consolidated (Millions) Operating Activities Net cash provided by (used in) operating activities $ 176 $ 190 $ 23 $ (15 ) $ 374 Investing Activities Proceeds from sale of assets — 6 — — 6 Cash payments for property, plant and equipment (130 ) (215 ) — — (345 ) Proceeds from deferred purchase price of factored receivables — 110 110 Net cash used in investing activities (130 ) (99 ) — — (229 ) Financing Activities Repayments of term loans and notes — (29 ) (516 ) — (545 ) Proceeds from term loans and notes — 29 500 — 529 Debt issuance cost on long-term debt — — (9 ) — (9 ) Purchase of common stock under the share repurchase program — — (225 ) — (225 ) Issuance of common shares — — 13 — 13 Increase in bank overdrafts — 10 — — 10 Borrowings on revolving lines of credit — 101 5,316 — 5,417 Payments on revolving lines of credit — (103 ) (5,118 ) — (5,221 ) Intercompany dividends and net (decrease) increase in intercompany obligations (39 ) 8 16 15 — Distribution to noncontrolling interests partners — (55 ) — — (55 ) Net cash used in financing activities (39 ) (39 ) (23 ) 15 (86 ) Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash — 2 — — 2 Increase in cash, cash equivalents and restricted cash 7 54 — — 61 Cash, cash equivalents and restricted cash, January 1 2 286 — — 288 Cash, cash equivalents and restricted cash, December 31 $ 9 $ 340 $ — $ — $ 349

Summary of Accounting Policie_3

Summary of Accounting Policies - Error Correction, Income Statement (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Costs incorrectly capitalized										$ 49	$ 42
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net sales and operating revenues	$ 4,278	$ 2,371	$ 2,533	$ 2,581	$ 2,389	$ 2,273	$ 2,314	$ 2,298	$ 11,763	9,274	8,597
Cost of sales (exclusive of depreciation and amortization)	3,698	2,014	2,157	2,202	2,019	1,912	1,949	1,932	10,071	7,812	7,126
Selling, general, and administrative									794	638	514
Depreciation and amortization									345	226	213
Engineering, research, and development									204	158	153
Goodwill impairment charge									3	11	0
Costs and expenses									11,417	8,845	8,006
Loss on sale of receivables									16	5	5
Non-service pension and postretirement benefit costs									20	16	84
Loss on extinguishment of debt									10	1	24
Equity in (earnings) losses of nonconsolidated affiliates, net of tax									(18)	1	0
Other expense (income), net									12	(2)	(1)
Total other expense (income)									40	21	112
Earnings before interest expense, income taxes, and noncontrolling interests	(31)	109	109	119	132	131	23	122	306	408	479
Interest expense									132	72	68
Earnings before income taxes and noncontrolling interests									174	336	411
Income tax expense (benefit)									63	71	(4)
Net income									111	265	415
Less: Net income attributable to noncontrolling interests									56	67	68
Net income attributable to Tenneco Inc.	$ (109)	$ 57	$ 47	$ 60	$ 62	$ 80	$ (5)	$ 61	$ 55	$ 198	$ 347
Basic earnings per share of common stock (in dollars per share)	$ (1.35)	$ 1.11	$ 0.92	$ 1.17	$ 1.19	$ 1.53	$ (0.09)	$ 1.13	$ 0.93	$ 3.75	$ 6.20
Diluted earnings per share of common stock (in dollars per share)	$ (1.35)	$ 1.11	$ 0.92	$ 1.17	$ 1.19	$ 1.53	$ (0.09)	$ 1.12	$ 0.93	$ 3.73	$ 6.15
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net sales and operating revenues		$ 2,372	$ 2,537	$ 2,574	$ 2,391	$ 2,274	$ 2,317	$ 2,292		$ 9,274	$ 8,599
Cost of sales (exclusive of depreciation and amortization)		2,014	2,159	2,198	2,020	1,911	1,949	1,929		7,809	7,116
Selling, general, and administrative										636	513
Depreciation and amortization										224	212
Engineering, research, and development										158	154
Goodwill impairment charge										11
Costs and expenses										8,838	7,995
Loss on sale of receivables										5	5
Non-service pension and postretirement benefit costs										0	0
Loss on extinguishment of debt										0	0
Equity in (earnings) losses of nonconsolidated affiliates, net of tax										0
Other expense (income), net										14	83
Total other expense (income)										19	88
Earnings before interest expense, income taxes, and noncontrolling interests		104	113	117	135	134	27	121		417	516
Interest expense										73	92
Earnings before income taxes and noncontrolling interests										344	424
Income tax expense (benefit)										70	0
Net income										274	424
Less: Net income attributable to noncontrolling interests										67	68
Net income attributable to Tenneco Inc.		$ 54	$ 50	$ 58	$ 68	$ 83	$ (3)	$ 59		$ 207	$ 356
Basic earnings per share of common stock (in dollars per share)		$ 1.05	$ 0.98	$ 1.13	$ 1.33	$ 1.57	$ (0.05)	$ 1.10		$ 3.93	$ 6.36
Diluted earnings per share of common stock (in dollars per share)		$ 1.05	$ 0.98	$ 1.13	$ 1.33	$ 1.57	$ (0.05)	$ 1.09		$ 3.91	$ 6.31
Revisions
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net sales and operating revenues		$ (1)	$ (4)	$ 7	$ (2)	$ (1)	$ (3)	$ 6		$ 0	$ (2)
Cost of sales (exclusive of depreciation and amortization)		0	(2)	4	(1)	1	0	3		3	10
Selling, general, and administrative										2	1
Depreciation and amortization										2	1
Engineering, research, and development											(1)
Costs and expenses										7	11
Other expense (income), net										1
Total other expense (income)										1
Earnings before interest expense, income taxes, and noncontrolling interests		5	(4)	2	(3)	(3)	(3)	1		(8)	(13)
Earnings before income taxes and noncontrolling interests										(8)	(13)
Income tax expense (benefit)										1	(4)
Net income										(9)	(9)
Net income attributable to Tenneco Inc.		$ 3	$ (3)	$ 2	$ (6)	$ (3)	$ (2)	$ 2		$ (9)	$ (9)
Basic earnings per share of common stock (in dollars per share)		$ 0.06	$ (0.06)	$ 0.04	$ (0.14)	$ (0.04)	$ (0.04)	$ 0.03		$ (0.18)	$ (0.16)
Diluted earnings per share of common stock (in dollars per share)		$ 0.06	$ (0.06)	$ 0.04	$ (0.14)	$ (0.04)	$ (0.04)	$ 0.03		$ (0.18)	$ (0.16)
Reclasses
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Non-service pension and postretirement benefit costs										$ 16	$ 84
Loss on extinguishment of debt										1	(24)
Equity in (earnings) losses of nonconsolidated affiliates, net of tax										1
Other expense (income), net										(17)	(84)
Total other expense (income)										1	24
Earnings before interest expense, income taxes, and noncontrolling interests										(1)	(24)
Interest expense										(1)	(24)
Reclasses | As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Earnings before interest expense, income taxes, and noncontrolling interests		$ 0	$ 0	$ 0	$ 0	$ 0	$ (1)	$ 0		(1)
As Reclassified
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net sales and operating revenues										9,274	8,599
Cost of sales (exclusive of depreciation and amortization)										7,809	7,116
Selling, general, and administrative										636	513
Depreciation and amortization										224	212
Engineering, research, and development										158	154
Goodwill impairment charge										11
Costs and expenses										8,838	7,995
Loss on sale of receivables										5	5
Non-service pension and postretirement benefit costs										16	84
Loss on extinguishment of debt										1	24
Equity in (earnings) losses of nonconsolidated affiliates, net of tax										1
Other expense (income), net										(3)	(1)
Total other expense (income)										20	112
Earnings before interest expense, income taxes, and noncontrolling interests										416	492
Interest expense										72	68
Earnings before income taxes and noncontrolling interests										344	424
Income tax expense (benefit)										70	0
Net income										274	424
Less: Net income attributable to noncontrolling interests										67	68
Net income attributable to Tenneco Inc.										$ 207	$ 356
Basic earnings per share of common stock (in dollars per share)										$ 3.93	$ 6.36
Diluted earnings per share of common stock (in dollars per share)										$ 3.91	$ 6.31
As Reclassified | As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Earnings before interest expense, income taxes, and noncontrolling interests		$ 104	$ 113	$ 117	$ 135	$ 134	$ 26	$ 121		$ 416

Summary of Accounting Policie_4

Summary of Accounting Policies - Error Correction, Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income	$ 111	$ 265	$ 415
Foreign currency translation adjustment	(134)	106	(56)
Defined benefit plans	(22)	17	51
Other comprehensive income (loss), net of tax	(156)	123	(5)
Comprehensive income (loss)	(45)	388	410
Less: Comprehensive income (loss) attributable to noncontrolling interests	54	69	64
Comprehensive income (loss) attributable to common shareholders	$ (99)	319	346
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		274	424
Foreign currency translation adjustment		99	(45)
Defined benefit plans		27	41
Other comprehensive income (loss), net of tax		126	(4)
Comprehensive income (loss)		400	420
Less: Comprehensive income (loss) attributable to noncontrolling interests		69	64
Comprehensive income (loss) attributable to common shareholders		331	356
Revisions
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		(9)	(9)
Foreign currency translation adjustment		7	(11)
Defined benefit plans		(10)	10
Other comprehensive income (loss), net of tax		(3)	(1)
Comprehensive income (loss)		(12)	(10)
Comprehensive income (loss) attributable to common shareholders		(12)	(10)
As Reclassified
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		274	424
Foreign currency translation adjustment		99	(45)
Defined benefit plans		27	41
Other comprehensive income (loss), net of tax		126	(4)
Comprehensive income (loss)		400	420
Less: Comprehensive income (loss) attributable to noncontrolling interests		69	64
Comprehensive income (loss) attributable to common shareholders		$ 331	$ 356

Summary of Accounting Policie_5

Summary of Accounting Policies - Error Correction, Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cash and cash equivalents	$ 697	$ 315
Restricted cash	5	3
Customer notes and accounts, net	2,487	1,294
Other	85	27
Inventories	2,245	820
Prepayments and other current assets	590	288
Total current assets	6,109	2,747
Property, plant and equipment, net	3,501	1,691
Long-term receivables, net	10	9
Goodwill	869	49
Intangibles, net	1,519	22
Investments in nonconsolidated affiliates	544	2
Deferred income taxes	467	213
Other assets	213	63
Total assets	13,232	4,796
Short-term debt, including current maturities of long-term debt	153	103
Accounts payable	2,759	1,582
Accrued compensation and employee benefits	343	141
Accrued income taxes	64	27
Accrued interest	33	14
Other	236	97
Accrued expenses and other current liabilities	1,001	424
Total current liabilities	4,320	2,277
Long-term debt	5,340	1,358
Deferred income taxes	88	11
Pension and postretirement benefits	1,167	268
Deferred credits and other liabilities	263	158
Total liabilities	11,178	4,072
Redeemable noncontrolling interests	138	42	$ 40	$ 41
Preferred stock—$0.01 par value; none issued	0	0
Additional paid-in capital	4,360	3,112
Accumulated other comprehensive loss	(692)	(538)
Accumulated deficit	(1,013)	(1,009)
Shareholders equity before deduction of treasury stock	2,656	1,566
Shares held as treasury stock—at cost: 2018 and 2017—14,592,888 shares	(930)	(930)
Total Tenneco Inc. shareholders’ equity	1,726	636
Noncontrolling interests	190	46
Total equity	1,916	682
Total liabilities, redeemable noncontrolling interests and equity	13,232	4,796
Class A
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Common stock	1	1
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cash and cash equivalents		315
Restricted cash		3
Customer notes and accounts, net		1,294
Other		27
Inventories		869
Prepayments and other current assets		291
Total current assets		2,799
Property, plant and equipment, net		1,615
Long-term receivables, net		9
Goodwill		49
Intangibles, net		22
Investments in nonconsolidated affiliates		0
Deferred income taxes		204
Other assets		144
Total assets		4,842
Short-term debt, including current maturities of long-term debt		83
Accounts payable		1,705
Accrued income taxes		45
Accrued interest		14
Accrued liabilities		287
Other		132
Total current liabilities		2,266
Long-term debt		1,358
Deferred income taxes		11
Pension and postretirement benefits		268
Deferred credits and other liabilities		155
Total liabilities		4,058
Redeemable noncontrolling interests	$ 35	42
Preferred stock—$0.01 par value; none issued		0
Additional paid-in capital		3,112
Accumulated other comprehensive loss		(541)
Accumulated deficit		(946)
Shareholders equity before deduction of treasury stock		1,626
Shares held as treasury stock—at cost: 2018 and 2017—14,592,888 shares		(930)
Total Tenneco Inc. shareholders’ equity		696
Noncontrolling interests		46
Total equity		742
Total liabilities, redeemable noncontrolling interests and equity		4,842
As Reported | Class A
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Common stock		1
Revisions
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Inventories		(49)
Prepayments and other current assets		(3)
Total current assets		(52)
Property, plant and equipment, net		(3)
Deferred income taxes		9
Total assets		(46)
Accrued income taxes		2
Accrued expenses and other current liabilities		9
Total current liabilities		11
Deferred credits and other liabilities		3
Total liabilities		14
Accumulated other comprehensive loss		3
Accumulated deficit		(63)
Shareholders equity before deduction of treasury stock		(60)
Total Tenneco Inc. shareholders’ equity		(60)
Total equity		(60)
Total liabilities, redeemable noncontrolling interests and equity		(46)
Reclasses
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Property, plant and equipment, net		79
Investments in nonconsolidated affiliates		2
Other assets		(81)
Short-term debt, including current maturities of long-term debt		20
Accounts payable		(123)
Accrued compensation and employee benefits		141
Accrued income taxes		(20)
Accrued interest		(14)
Accrued liabilities		(287)
Other		(132)
Accrued expenses and other current liabilities		415
As Reclassified
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cash and cash equivalents		315
Restricted cash		3
Customer notes and accounts, net		1,294
Other		27
Inventories		869
Prepayments and other current assets		291
Total current assets		2,799
Property, plant and equipment, net		1,694
Long-term receivables, net		9
Goodwill		49
Intangibles, net		22
Investments in nonconsolidated affiliates		2
Deferred income taxes		204
Other assets		63
Total assets		4,842
Short-term debt, including current maturities of long-term debt		103
Accounts payable		1,582
Accrued compensation and employee benefits		141
Accrued income taxes		25
Accrued expenses and other current liabilities		415
Total current liabilities		2,266
Long-term debt		1,358
Deferred income taxes		11
Pension and postretirement benefits		268
Deferred credits and other liabilities		155
Total liabilities		4,058
Redeemable noncontrolling interests		42
Preferred stock—$0.01 par value; none issued		0
Additional paid-in capital		3,112
Accumulated other comprehensive loss		(541)
Accumulated deficit		(946)
Shareholders equity before deduction of treasury stock		1,626
Shares held as treasury stock—at cost: 2018 and 2017—14,592,888 shares		(930)
Total Tenneco Inc. shareholders’ equity		696
Noncontrolling interests		46
Total equity		742
Total liabilities, redeemable noncontrolling interests and equity		4,842
As Reclassified | Class A
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Common stock		$ 1

Summary of Accounting Policie_6

Summary of Accounting Policies - Error Correction, Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income	$ 111	$ 265	$ 415
Net cash provided by operating activities	439	517	374
Net cash used by investing activities	(2,514)	(300)	(229)
Proceeds from term loans and notes	3,426	160	529
Repayments of term loans and notes	(453)	(36)	(545)
Borrowings on revolving lines of credit	5,149	6,664	5,417
Payments on revolving lines of credit	(5,405)	(6,737)	(5,221)
Net cash provided (used) by financing activities	$ 2,476	(251)	(86)
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		274	424
Net cash provided by operating activities		629	484
Net cash used by investing activities		(413)	(340)
Retirement of long-term debt		(19)	(531)
Issuance of long-term debt		137	509
Net increase (decrease) in revolver borrowings		(67)	202
Net cash provided (used) by financing activities		(251)	(86)
Revisions
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		(9)	(9)
Proceeds from term loans and notes		23	20
Repayments of term loans and notes		(17)	(14)
Borrowings on revolving lines of credit		6,664	5,417
Payments on revolving lines of credit		(6,737)	(5,221)
Net increase (decrease) in revolver borrowings		67	(202)
Reclasses
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Proceeds from term loans and notes		137	509
Repayments of term loans and notes		(19)	(531)
Retirement of long-term debt		19	531
Issuance of long-term debt		(137)	(509)
As Reclassified
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		274	424
Proceeds from term loans and notes		137	509
Repayments of term loans and notes		(19)	(531)
Net increase (decrease) in revolver borrowings		(67)	202
Net cash provided (used) by financing activities		$ (251)	$ (86)

Summary of Accounting Policie_7

Summary of Accounting Policies - Error Correction, Equity Statement (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of year	$ 682
Net income	111	$ 265	$ 415
Foreign currency translation adjustment	(134)	106	(56)
Defined benefit plans	(22)	17	51
Other comprehensive income (loss), net of tax	(156)	123	(5)
Comprehensive income (loss) attributable to noncontrolling interests	(54)	(69)	(64)
Balance at end of period	1,916	682
As Reported
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of year	742
Net income		274	424
Foreign currency translation adjustment		99	(45)
Defined benefit plans		27	41
Other comprehensive income (loss), net of tax		126	(4)
Comprehensive income (loss) attributable to noncontrolling interests		(69)	(64)
Balance at end of period		742
Revisions
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of year	(60)
Net income		(9)	(9)
Foreign currency translation adjustment		7	(11)
Defined benefit plans		(10)	10
Other comprehensive income (loss), net of tax		(3)	(1)
Balance at end of period		(60)
Accumulated Deficit
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of year	(1,009)	(1,154)	(1,501)
Net income	55	198	347
Cash dividends	(59)	(53)
Balance at end of period	(1,013)	(1,009)	(1,154)
Accumulated Deficit | As Reported
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of year	(946)	(1,100)	(1,456)
Net income		207	356
Cash dividends		(53)
Balance at end of period		(946)	(1,100)
Accumulated Deficit | Revisions
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of year	(63)	(54)	(45)
Net income		(9)	(9)
Cash dividends		0
Balance at end of period		(63)	(54)
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of year	(538)	(659)	(658)
Foreign currency translation adjustment	(132)	104	(52)
Defined benefit plans	(22)	17	51
Balance at end of period	(692)	(538)	(659)
Accumulated Other Comprehensive Loss | As Reported
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of year	(541)	(665)	(665)
Foreign currency translation adjustment		97	(41)
Defined benefit plans		27	41
Balance at end of period		(541)	(665)
Accumulated Other Comprehensive Loss | Revisions
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of year	3	6	7
Foreign currency translation adjustment		7	(11)
Defined benefit plans		(10)	10
Balance at end of period		3	6
Total Tenneco Inc. Shareholders' Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of year	636	525	387
Net income	55	198	347
Foreign currency translation adjustment	(132)	104	(52)
Defined benefit plans	(22)	17	51
Other comprehensive income (loss), net of tax	(99)	319	346
Stock-based compensation expense	12	14	17
Cash dividends	(59)	(53)
Purchases of treasury stock		(169)	(225)
Balance at end of period	1,726	636	525
Total Tenneco Inc. Shareholders' Equity | As Reported
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of year	696	573	425
Net income		207	356
Foreign currency translation adjustment		97	(41)
Defined benefit plans		27	41
Other comprehensive income (loss), net of tax		331	356
Stock-based compensation expense		14	17
Cash dividends		(53)
Purchases of treasury stock		(169)	(225)
Balance at end of period		696	573
Total Tenneco Inc. Shareholders' Equity | Revisions
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of year	(60)	(48)	(38)
Net income		(9)	(9)
Foreign currency translation adjustment		7	(11)
Defined benefit plans		(10)	10
Other comprehensive income (loss), net of tax		(12)	(10)
Stock-based compensation expense		0	0
Cash dividends		0
Purchases of treasury stock		0	0
Balance at end of period		(60)	(48)
Total Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of year	682	572	426
Net income	82	229	379
Foreign currency translation adjustment	(132)	103	(54)
Defined benefit plans	(22)	17	51
Other comprehensive income (loss), net of tax	(72)	349	376
Stock-based compensation expense	12	14	17
Cash dividends	(59)	(53)
Purchases of treasury stock		(169)	(225)
Distributions declared to noncontrolling interests	(26)	(31)	(22)
Balance at end of period	1,916	682	572
Total Equity | As Reported
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of year	742	620	464
Net income		238	388
Foreign currency translation adjustment		96	(43)
Defined benefit plans		27	41
Other comprehensive income (loss), net of tax		361	386
Stock-based compensation expense		14	17
Cash dividends		(53)
Purchases of treasury stock		(169)	(225)
Distributions declared to noncontrolling interests		(31)	(22)
Balance at end of period		742	620
Total Equity | Revisions
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of year	$ (60)	(48)	(38)
Net income		(9)	(9)
Foreign currency translation adjustment		7	(11)
Defined benefit plans		(10)	10
Other comprehensive income (loss), net of tax		(12)	(10)
Stock-based compensation expense		0	0
Cash dividends		0
Purchases of treasury stock		0	0
Distributions declared to noncontrolling interests		0	0
Balance at end of period		$ (60)	$ (48)

Summary of Accounting Policie_8

Summary of Accounting Policies - Notes and Accounts Receivable and Allowance for Doubtful Accounts (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Restricted cash	$ 5,000,000	$ 3,000,000
Allowance for doubtful accounts on short-term and long-term accounts receivable	17,000,000	16,000,000
Allowance for doubtful accounts on short-term and long-term notes receivable	$ 0	$ 0

Summary of Accounting Policie_9

Summary of Accounting Policies - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Redeemable Noncontrolling Interest [Line Items]
Increase from acquisition	$ 96	$ 0	$ 0
Redeemable noncontrolling interests	138	42	$ 40	$ 41
Certain Subsidiaries
Redeemable Noncontrolling Interest [Line Items]
Increase from acquisition	10
Subsidiary In India
Redeemable Noncontrolling Interest [Line Items]
Increase from acquisition	86
As Reported
Redeemable Noncontrolling Interest [Line Items]
Redeemable noncontrolling interests	$ 35	$ 42

Summary of Accounting Polici_10

Summary of Accounting Policies - Redeemable Non Controlling Interest (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Redeemable Noncontrolling Interest [Roll Forward]
Beginning Balance	$ 42	$ 40	$ 41
Federal-Mogul acquisition	96	0	0
Net income attributable to redeemable noncontrolling interests	(29)	(36)	(36)
Other comprehensive (loss) income	(2)	3	(2)
Contributions received	6	0	0
Dividends declared	(33)	(37)	(35)
Ending Balance	$ 138	$ 42	$ 40

Summary of Accounting Polici_11

Summary of Accounting Policies - Pre-production Design and Development and Tooling Assets (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
In-process tools and dies built for original equipment customers	$ 193	$ 142

Summary of Accounting Polici_12

Summary of Accounting Policies - Engineering, Research and Development (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Engineering, research, and development	$ 204	$ 158	$ 153

Summary of Accounting Polici_13

Summary of Accounting Policies - Advertising and Promotion Expenses (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Advertising and promotion expenses	$ 36	$ 40	$ 40

Summary of Accounting Polici_14

Summary of Accounting Policies - Foreign Currency Translation (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Foreign currency transaction gains (losses)	$ 15	$ (4)	$ 1

Summary of Accounting Polici_15

Summary of Accounting Policies - Adoption of ASC 606 (Details) - USD ($)		3 Months Ended										12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018		Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016	Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Inventories		$ 2,245,000,000					$ 820,000,000					$ 2,245,000,000		$ 820,000,000
Prepayments and other current assets		590,000,000					288,000,000					590,000,000		288,000,000
Accrued expenses and other current liabilities		1,001,000,000										1,001,000,000
Accumulated deficit		(1,013,000,000)					(1,009,000,000)					(1,013,000,000)		(1,009,000,000)
Net sales and operating revenues		4,278,000,000	$ 2,371,000,000	$ 2,533,000,000	$ 2,581,000,000		2,389,000,000	$ 2,273,000,000	$ 2,314,000,000	$ 2,298,000,000		11,763,000,000		9,274,000,000		$ 8,597,000,000
Cost of sales (exclusive of depreciation and amortization)		3,698,000,000	2,014,000,000	2,157,000,000	2,202,000,000		2,019,000,000	1,912,000,000	1,949,000,000	1,932,000,000		10,071,000,000		7,812,000,000		7,126,000,000
Selling, general, and administrative												794,000,000		638,000,000		514,000,000
Non-service pension and postretirement benefit costs												20,000,000		16,000,000		84,000,000
Other expense (income), net												12,000,000		(2,000,000)		(1,000,000)
Receivables												(190,000,000)		(81,000,000)		(325,000,000)
Net cash provided by operating activities												439,000,000		517,000,000		374,000,000
Change in restricted cash														0		0
Proceeds from deferred purchase price of factored receivables												174,000,000		112,000,000		110,000,000
Net cash used by investing activities												(2,514,000,000)		(300,000,000)		(229,000,000)
Increase (decrease) in cash, cash equivalents and restricted cash												384,000,000		(31,000,000)		61,000,000
Cash, cash equivalents and restricted cash, January 1					318,000,000	[1]				349,000,000	[1]	318,000,000	[1]	349,000,000	[1]	288,000,000
Cash, cash equivalents and restricted cash, December 31	[1]	702,000,000					318,000,000					702,000,000		318,000,000		349,000,000
As Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Inventories							869,000,000							869,000,000
Prepayments and other current assets							291,000,000							291,000,000
Accumulated deficit							(946,000,000)							(946,000,000)
Net sales and operating revenues			2,372,000,000	2,537,000,000	2,574,000,000		2,391,000,000	2,274,000,000	2,317,000,000	2,292,000,000				9,274,000,000		8,599,000,000
Cost of sales (exclusive of depreciation and amortization)			$ 2,014,000,000	$ 2,159,000,000	2,198,000,000		2,020,000,000	$ 1,911,000,000	$ 1,949,000,000	1,929,000,000				7,809,000,000		7,116,000,000
Selling, general, and administrative														636,000,000		513,000,000
Non-service pension and postretirement benefit costs														0		0
Other expense (income), net														14,000,000		83,000,000
Receivables														31,000,000		(215,000,000)
Net cash provided by operating activities														629,000,000		484,000,000
Change in restricted cash														(1,000,000)		(1,000,000)
Proceeds from deferred purchase price of factored receivables														0		0
Net cash used by investing activities														(413,000,000)		(340,000,000)
Increase (decrease) in cash, cash equivalents and restricted cash														(32,000,000)		60,000,000
Cash, cash equivalents and restricted cash, January 1					315,000,000	[1]				347,000,000	[1]	315,000,000	[1]	347,000,000	[1]	287,000,000
Cash, cash equivalents and restricted cash, December 31	[1]						315,000,000							315,000,000		347,000,000
ASU 2016-18 | Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Receivables														0		0
Net cash provided by operating activities														0		0
Change in restricted cash														1,000,000		1,000,000
Proceeds from deferred purchase price of factored receivables														0		0
Net cash used by investing activities														1,000,000		1,000,000
Increase (decrease) in cash, cash equivalents and restricted cash														1,000,000		1,000,000
Cash, cash equivalents and restricted cash, January 1					3,000,000	[1]				2,000,000	[1]	3,000,000	[1]	2,000,000	[1]	1,000,000
Cash, cash equivalents and restricted cash, December 31	[1]						3,000,000							3,000,000		2,000,000
ASU 2016-15 | Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Receivables														(112,000,000)		(110,000,000)
Net cash provided by operating activities														(112,000,000)		(110,000,000)
Change in restricted cash														0		0
Proceeds from deferred purchase price of factored receivables														112,000,000		110,000,000
Net cash used by investing activities														112,000,000		110,000,000
Increase (decrease) in cash, cash equivalents and restricted cash														0		0
Cash, cash equivalents and restricted cash, January 1					$ 0	[1]				$ 0	[1]	0	[1]	0	[1]	0
Cash, cash equivalents and restricted cash, December 31	[1]						0							0		0
ASU 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Inventories																	$ 815,000,000
Prepayments and other current assets																	294,000,000
Accumulated deficit																	(1,008,000,000)
ASU 2014-09 | Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated deficit																	1,000,000
ASU 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect																	$ 1,000,000
ASU 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of sales (exclusive of depreciation and amortization)														7,812,000,000		7,126,000,000
Selling, general, and administrative														638,000,000		514,000,000
Non-service pension and postretirement benefit costs														16,000,000		84,000,000
Other expense (income), net														(2,000,000)		(1,000,000)
ASU 2017-07 | As Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of sales (exclusive of depreciation and amortization)														7,815,000,000		7,133,000,000
Selling, general, and administrative														650,000,000		590,000,000
Non-service pension and postretirement benefit costs														0		0
Other expense (income), net														(1,000,000)		0
ASU 2017-07 | Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of sales (exclusive of depreciation and amortization)														(3,000,000)		(7,000,000)
Selling, general, and administrative														(12,000,000)		(76,000,000)
Non-service pension and postretirement benefit costs														16,000,000		84,000,000
Other expense (income), net														(1,000,000)		$ (1,000,000)
Product returns | ASU 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Inventories		0										0
Prepayments and other current assets		(44,000,000)										(44,000,000)
Accrued expenses and other current liabilities		(44,000,000)										(44,000,000)
Accumulated deficit		0										0
Net sales and operating revenues												2,000,000
Cost of sales (exclusive of depreciation and amortization)												(2,000,000)
Overtime recognition | ASU 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Inventories		8,000,000					(5,000,000)					8,000,000		(5,000,000)
Prepayments and other current assets		(9,000,000)					6,000,000					(9,000,000)		6,000,000
Accrued expenses and other current liabilities		0										0
Accumulated deficit		(1,000,000)					$ 1,000,000					(1,000,000)		$ 1,000,000
Net sales and operating revenues												3,000,000
Cost of sales (exclusive of depreciation and amortization)												(3,000,000)
Balances Without Adoption of ASC Topic 606 | ASU 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Inventories		2,253,000,000										2,253,000,000
Prepayments and other current assets		537,000,000										537,000,000
Accrued expenses and other current liabilities		957,000,000										957,000,000
Accumulated deficit		$ (1,014,000,000)										(1,014,000,000)
Net sales and operating revenues												11,768,000,000
Cost of sales (exclusive of depreciation and amortization)												$ 10,066,000,000
[1]	Cash and cash equivalents include highly liquid investments with a maturity of three months or less at the date of purchase.

Acquisitions and Divestitures -

Acquisitions and Divestitures - Acquisition of Federal-Mogul (Details) - USD ($)	Oct. 01, 2018	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Sep. 30, 2018
Business Acquisition [Line Items]
Authorized common stock available for issuance under the plan	250,000,000					135,000,000
Borrowings on revolving lines of credit			$ 5,149,000,000	$ 6,664,000,000	$ 5,417,000,000
Borrowing capacity		$ 5,054,000,000	$ 5,054,000,000
Common and preferred stock authorized						185,000,000
Common stock, par value (in dollars per share)						$ 0.01
Authorized shares (in shares)	50,000,000	50,000,000	50,000,000	50,000,000		50,000,000
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Goodwill		$ 869,000,000	$ 869,000,000	$ 49,000,000
Class B
Business Acquisition [Line Items]
Authorized common stock available for issuance under the plan	25,000,000
Class A
Business Acquisition [Line Items]
Authorized common stock available for issuance under the plan	175,000,000	175,000,000	175,000,000	135,000,000
Common stock, par value (in dollars per share)		$ 0.01	$ 0.01	$ 0.01
Federal-Mogul
Business Acquisition [Line Items]
Purchase price	$ 3,707,000,000
Cash Consideration	$ 800,000,000
Tenneco share price at October 1, 2018	$ 41.99
Repayment of Federal-Mogul debt and accrued interest	$ 1,660,000,000
Advisory fees			$ 68,000,000
Acquisition related costs			96,000,000
Payment for advisory fees	11,000,000
Goodwill	825,000,000
Step up of inventory	$ 152,000,000
Non-cash charge for inventory step-up		$ 105,000,000
Revenue since acquisition		1,886,000,000
Net loss since acquisition		69,000,000
Common Stock | Federal-Mogul
Business Acquisition [Line Items]
Tenneco shares issued for purchase of Federal-Mogul	29,444,846
Fair value of the Stock Consideration	$ 1,236,000,000
Common Stock | Federal-Mogul | Class B
Business Acquisition [Line Items]
Common stock, par value (in dollars per share)	$ 0.01
Tenneco shares issued for purchase of Federal-Mogul	23,793,669
Common Stock | Federal-Mogul | Class A
Business Acquisition [Line Items]
Common stock, par value (in dollars per share)	$ 0.01
Percentage of outstanding shares	9.90%
Tenneco shares issued for purchase of Federal-Mogul	5,651,177
Federal-Mogul
Business Acquisition [Line Items]
Acquisition related costs			4,000,000
Accrued interest	$ 5,000,000
Revolving Credit Facility
Business Acquisition [Line Items]
Debt term	5 years
Borrowing capacity	$ 1,500,000,000
Revolving Credit Facility | Federal-Mogul
Business Acquisition [Line Items]
Extinguishment of debt	$ 200,000,000
Term Loan A Facility
Business Acquisition [Line Items]
Debt term	5 years
Borrowing capacity	$ 1,700,000,000
Term Loan B Facility
Business Acquisition [Line Items]
Debt term	7 years
Borrowing capacity	$ 1,700,000,000
Term Loan | Federal-Mogul
Business Acquisition [Line Items]
Extinguishment of debt	1,455,000,000
Line of Credit
Business Acquisition [Line Items]
Borrowings on revolving lines of credit	4,900,000,000
Borrowing capacity	$ 4,900,000,000
Line of Credit | Revolving Credit Facility
Business Acquisition [Line Items]
Debt term	5 years
Borrowing capacity	$ 1,500,000,000
Powertrain
Business Acquisition [Line Items]
Goodwill		388,000,000	388,000,000	$ 0
Powertrain | Federal-Mogul
Business Acquisition [Line Items]
Goodwill	388,000,000
Motorparts
Business Acquisition [Line Items]
Goodwill		$ 437,000,000	$ 437,000,000	$ 0
Motorparts | Federal-Mogul
Business Acquisition [Line Items]
Goodwill	$ 437,000,000

Acquisitions and Divestitures_2

Acquisitions and Divestitures - Purchase Price Allocation (Details) - Federal-Mogul $ / shares in Units, $ in Millions	Oct. 01, 2018USD ($)$ / sharesshares
Business Acquisition [Line Items]
Tenneco share price at October 1, 2018 | $ / shares	$ 41.99
Cash Consideration	$ 811
Repayment of Federal-Mogul debt and accrued interest	1,660
Total consideration	$ 3,707
Common Stock
Business Acquisition [Line Items]
Tenneco shares issued for purchase of Federal-Mogul | shares	29,444,846
Fair value of the Stock Consideration	$ 1,236

Acquisitions and Divestitures_3

Acquisitions and Divestitures - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	Dec. 31, 2018	Oct. 01, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Goodwill	$ 869		$ 49
Federal-Mogul
Business Acquisition [Line Items]
Cash, cash equivalents and restricted cash		$ 277
Customer notes and accounts receivable		1,258
Other receivables		62
Inventories		1,551
Prepayments and other current assets		198
Property, plant and equipment		1,711
Long-term receivables		48
Goodwill		825
Intangibles		1,530
Investments in nonconsolidated affiliates		528
Deferred income taxes		166
Other assets		55
Total assets acquired		8,209
Short-term debt, including current maturities of long-term debt		130
Accounts payable		957
Accrued compensation and employee benefits		231
Accrued income taxes		49
Accrued expenses and other current liabilities		522
Long-term debt		1,315
Deferred income taxes		56
Pension and postretirement benefits	$ 848	879
Deferred credits and other liabilities		124
Total liabilities assumed		4,263
Redeemable noncontrolling interests		96
Noncontrolling interests		143
Net assets and noncontrolling interests acquired		$ 3,707

Acquisitions and Divestitures_4

Acquisitions and Divestitures - Assets Acquired (Details) - Federal-Mogul $ in Millions	Oct. 01, 2018USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Total definite-lived intangible assets	$ 1,165
Weighted-Average Useful Lives	10 years 6 months
Intangibles	$ 1,530
Customer platforms and relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Total definite-lived intangible assets	$ 964
Weighted-Average Useful Lives	10 years
Technology rights
Acquired Finite-Lived Intangible Assets [Line Items]
Total definite-lived intangible assets	$ 69
Weighted-Average Useful Lives	10 years
Packaged kits know-how
Acquired Finite-Lived Intangible Assets [Line Items]
Total definite-lived intangible assets	$ 36
Weighted-Average Useful Lives	10 years
Licensing agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Total definite-lived intangible assets	$ 66
Weighted-Average Useful Lives	4 years 6 months
Land use rights
Acquired Finite-Lived Intangible Assets [Line Items]
Total definite-lived intangible assets	$ 30
Weighted-Average Useful Lives	42 years 9 months
Trade names and trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 365

Acquisitions and Divestitures_5

Acquisitions and Divestitures - Pro Forma (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Business Combinations [Abstract]
Net sales and operating revenues	$ 17,860	$ 17,153
Earnings before income taxes and noncontrolling interests	488	235
Net income attributable to Tenneco Inc.	$ 275	$ 372
Basic earnings per share of common stock (in dollars per share)	$ 3.41	$ 4.52
Diluted earnings per share of common stock (in dollars per share)	$ 3.40	$ 4.51

Acquisitions and Divestitures_6

Acquisitions and Divestitures - Other Matters (Details) - USD ($) $ / shares in Millions, $ in Millions	Oct. 19, 2018	Jun. 29, 2018	Dec. 31, 2018	Oct. 01, 2018	Jun. 30, 2017
Loss Contingencies [Line Items]
Estimated liability			$ 53		$ 132
Awarded to other party (in dollars per share)	$ 0
Awarded to other party	$ 61
Federal-Mogul
Loss Contingencies [Line Items]
Capital contribution		$ 56
Estimated liability				$ 55
Accrued interest				$ 6

Acquisitions and Divestitures_7

Acquisitions and Divestitures - Assets Held For Sale (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of assets		$ 9	$ 8	$ 6
Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Inventories	$ 33	33
Other current assets	5	5
Long-lived assets	23	23
Total assets held for sale	61	61
Accounts payable	21	21
Accrued liabilities	7	7
Other liabilities	11	11
Total liabilities held for sale	39	39
Motorsports Certain Assets and Liabilities | Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale price	29	$ 29
Proceeds from sale of assets	$ 22

Restructuring Charges and Ass_3

Restructuring Charges and Asset Impairments, Net - Incurred Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 112	$ 47	$ 30
Asset write down	8	3	6
Cost of sales
Restructuring Cost and Reserve [Line Items]
Restructuring costs	66	41	17
Asset write down	3	0	0
Engineering, research, and development
Restructuring Cost and Reserve [Line Items]
Restructuring costs	4	0	1
Selling, general, and administrative
Restructuring Cost and Reserve [Line Items]
Restructuring costs	40	6	12
Asset write down	2	0	0
Depreciation and amortization
Restructuring Cost and Reserve [Line Items]
Asset write down	3	3	4
Other expense
Restructuring Cost and Reserve [Line Items]
Restructuring costs	2	0	0
Asset write down	0	0	2
Clean Air
Restructuring Cost and Reserve [Line Items]
Restructuring costs	14	23	6
Asset write down	0	2	1
Ride Performance
Restructuring Cost and Reserve [Line Items]
Restructuring costs	48	16	13
Asset write down	6	1	2
Aftermarket
Restructuring Cost and Reserve [Line Items]
Restructuring costs	16	7	9
Asset write down	0	0	3
Powertrain
Restructuring Cost and Reserve [Line Items]
Restructuring costs	(2)	0	0
Motorparts
Restructuring Cost and Reserve [Line Items]
Restructuring costs	31	0	0
Other
Restructuring Cost and Reserve [Line Items]
Restructuring costs	5	1	2
Asset write down	$ 2	$ 0	$ 0

Restructuring Charges and Ass_4

Restructuring Charges and Asset Impairments, Net - Additional Information (Details) - USD ($)	Jan. 29, 2019	Oct. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring costs			$ 112,000,000	$ 47,000,000	$ 30,000,000
Payments for Restructuring			68,000,000	39,000,000	45,000,000
Asset write down			8,000,000	3,000,000	6,000,000
Restructuring Charges			115,000,000	47,000,000	30,000,000
Australia
Restructuring Cost and Reserve [Line Items]
Non- cash charges				2,000,000
Beijing, China
Restructuring Cost and Reserve [Line Items]
Restructuring costs			25,000,000
Germany
Restructuring Cost and Reserve [Line Items]
Restructuring costs			10,000,000
Facility Closure and Other Costs
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring			27,000,000	17,000,000	29,000,000
Asset write down		$ 6,000,000
Restructuring Charges		$ 24,000,000	25,000,000	16,000,000	11,000,000
Facility Closure and Other Costs | Beijing, China
Restructuring Cost and Reserve [Line Items]
Restructuring costs				6,000,000
Facility Closure and Other Costs | Belgium
Restructuring Cost and Reserve [Line Items]
Restructuring costs				10,000,000
Asset write down				1,000,000
Cost Improvement Initiatives
Restructuring Cost and Reserve [Line Items]
Restructuring costs			16,000,000	13,000,000
Asset write down			$ 2
Subsequent event
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 45,000,000
Reduction in Structural Costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs					36,000,000
Asset write down					$ 6,000,000
Reduction in Structural Costs | Australia
Restructuring Cost and Reserve [Line Items]
Restructuring costs				$ 21,000,000

Restructuring Charges and Ass_5

Restructuring Charges and Asset Impairments, Net - Roll Forward of Restructuring Reserve (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Oct. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring Reserve [Roll Forward]
Restructuring Reserve, beginning balance		$ 25	$ 15	$ 30
Federal-Mogul Acquisition		37
Provisions		115	47	30
Held for sale		(2)
Revisions to estimates		(3)		0
Payments		(68)	(39)	(45)
Foreign currency		(1)	2
Restructuring Reserve, ending balance		103	25	15
Employee Costs
Restructuring Reserve [Roll Forward]
Restructuring Reserve, beginning balance		19	8	20
Federal-Mogul Acquisition		37
Provisions		90	31	19
Held for sale		(2)
Revisions to estimates		(4)		(15)
Payments		(41)	(22)	(16)
Foreign currency		(1)	2
Restructuring Reserve, ending balance		98	19	8
Facility Closure and Other Costs
Restructuring Reserve [Roll Forward]
Restructuring Reserve, beginning balance		6	7	10
Federal-Mogul Acquisition		0
Provisions	$ 24	25	16	11
Held for sale		0
Revisions to estimates		1		15
Payments		(27)	(17)	(29)
Foreign currency		0	0
Restructuring Reserve, ending balance		5	6	7
Total Reportable Segments
Restructuring Reserve [Roll Forward]
Restructuring Reserve, beginning balance		25	14	30
Federal-Mogul Acquisition		37
Provisions		110	46	28
Held for sale		(2)
Revisions to estimates		(3)
Payments		(66)	(37)	(44)
Foreign currency		(1)	2
Restructuring Reserve, ending balance		100	25	14
Clean Air | Total Reportable Segments
Restructuring Reserve [Roll Forward]
Restructuring Reserve, beginning balance		14	2	2
Federal-Mogul Acquisition		0
Provisions		14	23	6
Held for sale		0
Revisions to estimates		0
Payments		(10)	(12)	(6)
Foreign currency		(1)	1
Restructuring Reserve, ending balance		17	14	2
Ride Performance | Total Reportable Segments
Restructuring Reserve [Roll Forward]
Restructuring Reserve, beginning balance		7	6	24
Federal-Mogul Acquisition		0
Provisions		48	16	13
Held for sale		0
Revisions to estimates		0
Payments		(35)	(16)	(31)
Foreign currency		0	1
Restructuring Reserve, ending balance		20	7	6
Aftermarket | Total Reportable Segments
Restructuring Reserve [Roll Forward]
Restructuring Reserve, beginning balance		4	6	4
Federal-Mogul Acquisition		0
Provisions		16	7	9
Held for sale		0
Revisions to estimates		0
Payments		(12)	(9)	(7)
Foreign currency		0	0
Restructuring Reserve, ending balance		8	4	6
Powertrain | Total Reportable Segments
Restructuring Reserve [Roll Forward]
Restructuring Reserve, beginning balance		0	0	0
Federal-Mogul Acquisition		22
Provisions		1	0	0
Held for sale		0
Revisions to estimates		(3)
Payments		(5)	0	0
Foreign currency		0	0
Restructuring Reserve, ending balance		15	0	0
Motorparts | Total Reportable Segments
Restructuring Reserve [Roll Forward]
Restructuring Reserve, beginning balance		0	0	0
Federal-Mogul Acquisition		15
Provisions		31	0	0
Held for sale		(1)
Revisions to estimates		0
Payments		(4)	0	0
Foreign currency		0	0
Restructuring Reserve, ending balance		40	0	0
Other | Total Reportable Segments
Restructuring Reserve [Roll Forward]
Restructuring Reserve, beginning balance		0	1	0
Federal-Mogul Acquisition		0
Provisions		5	1	2
Held for sale		0
Revisions to estimates		0
Payments		(2)	(2)	(1)
Foreign currency		0	0
Restructuring Reserve, ending balance		$ 3	$ 0	$ 1

Inventories (Details)

Inventories (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Finished goods	$ 1,116	$ 300
Work in process	562	268
Raw materials	457	178
Materials and supplies	110	74
Total inventories	$ 2,245	$ 820

Property, Plant and Equipment_3

Property, Plant and Equipment—Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Plant, property, and equipment, at cost	$ 6,303	$ 4,369
Less — Accumulated depreciation and amortization	(2,802)	(2,678)
Plant, property and equipment, net	3,501	1,691
Depreciation and amortization	313	223	$ 210
Land
Property, Plant and Equipment [Line Items]
Plant, property, and equipment, at cost	293	20
Buildings and improvements
Property, Plant and Equipment [Line Items]
Plant, property, and equipment, at cost	$ 1,023	615
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Useful life of plant, property and equipment	10 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Useful life of plant, property and equipment	50 years
Machinery, equipment and tooling
Property, Plant and Equipment [Line Items]
Plant, property, and equipment, at cost	$ 4,041	2,992
Machinery, equipment and tooling | Minimum
Property, Plant and Equipment [Line Items]
Useful life of plant, property and equipment	3 years
Machinery, equipment and tooling | Maximum
Property, Plant and Equipment [Line Items]
Useful life of plant, property and equipment	25 years
Capitalized software
Property, Plant and Equipment [Line Items]
Plant, property, and equipment, at cost	$ 378	346
Capitalized software | Minimum
Property, Plant and Equipment [Line Items]
Useful life of plant, property and equipment	3 years
Capitalized software | Maximum
Property, Plant and Equipment [Line Items]
Useful life of plant, property and equipment	12 years
Other, including construction in progress
Property, Plant and Equipment [Line Items]
Plant, property, and equipment, at cost	$ 568	$ 396

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets—Net - Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Oct. 01, 2018
Goodwill [Roll Forward]
Gross carrying amount, January 1	$ 408	$ 405
Acquisition of Federal-Mogul (1)	825
Currency translation	(2)	3
Gross carrying amount, December 31	1,231	408	$ 405
Accumulated impairment loss, January 1	(359)	(348)
Impairment	(3)	(11)	0
Accumulated impairment loss, December 31	(362)	(359)	(348)
Net carrying value, December 31	869	49
Clean Air
Goodwill [Roll Forward]
Gross carrying amount, January 1	23	21
Acquisition of Federal-Mogul (1)	0
Currency translation	(1)	2
Gross carrying amount, December 31	22	23	21
Accumulated impairment loss, January 1	0	0
Impairment	0	0
Accumulated impairment loss, December 31	0	0	0
Net carrying value, December 31	22	23
Ride Performance
Goodwill [Roll Forward]
Gross carrying amount, January 1	156	155
Acquisition of Federal-Mogul (1)	0
Currency translation	(1)	1
Gross carrying amount, December 31	155	156	155
Accumulated impairment loss, January 1	(140)	(133)
Impairment	(3)	(7)
Accumulated impairment loss, December 31	(143)	(140)	(133)
Net carrying value, December 31	12	16
Aftermarket
Goodwill [Roll Forward]
Gross carrying amount, January 1	229	229
Acquisition of Federal-Mogul (1)	0
Currency translation	0	0
Gross carrying amount, December 31	229	229	229
Accumulated impairment loss, January 1	(219)	(215)
Impairment	0	(4)
Accumulated impairment loss, December 31	(219)	(219)	(215)
Net carrying value, December 31	10	10
Powertrain
Goodwill [Roll Forward]
Gross carrying amount, January 1	0	0
Acquisition of Federal-Mogul (1)	388
Currency translation	0	0
Gross carrying amount, December 31	388	0	0
Accumulated impairment loss, January 1	0	0
Impairment	0	0
Accumulated impairment loss, December 31	0	0	0
Net carrying value, December 31	388	0
Motorparts
Goodwill [Roll Forward]
Gross carrying amount, January 1	0	0
Acquisition of Federal-Mogul (1)	437
Currency translation	0	0
Gross carrying amount, December 31	437	0	0
Accumulated impairment loss, January 1	0	0
Impairment	0	0
Accumulated impairment loss, December 31	0	0	$ 0
Net carrying value, December 31	437	$ 0
Federal-Mogul
Goodwill [Roll Forward]
Acquisition of Federal-Mogul (1)	$ 825
Net carrying value, December 31				$ 825
Federal-Mogul | Powertrain
Goodwill [Roll Forward]
Net carrying value, December 31				388
Federal-Mogul | Motorparts
Goodwill [Roll Forward]
Net carrying value, December 31				$ 437

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets—Net - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Goodwill impairment charge	$ 3	$ 11	$ 0
Amortization of intangible assets	32	3	$ 3
Ride Performance
Goodwill [Line Items]
Goodwill impairment charge	3	7
Aftermarket
Goodwill [Line Items]
Goodwill impairment charge	$ 0	$ 4

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets—Net - Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 1,217	$ 53
Accumulated Amortization	(63)	(31)
Net Carrying Value	1,154	22
Indefinite-lived intangible assets	365
Intangible assets, gross	1,582	53
Intangible assets, net	$ 1,519	22
Customer platforms and relationships
Finite-Lived Intangible Assets [Line Items]
Finite useful life of intangible assets	10 years
Gross Carrying Value	$ 964	0
Accumulated Amortization	(24)	0
Net Carrying Value	$ 940	0
Customer contract
Finite-Lived Intangible Assets [Line Items]
Finite useful life of intangible assets	10 years
Gross Carrying Value	$ 8	8
Accumulated Amortization	(5)	(5)
Net Carrying Value	3	3
Patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	1	1
Accumulated Amortization	(1)	(1)
Net Carrying Value	$ 0	0
Patents | Minimum
Finite-Lived Intangible Assets [Line Items]
Finite useful life of intangible assets	10 years
Patents | Maximum
Finite-Lived Intangible Assets [Line Items]
Finite useful life of intangible assets	17 years
Technology rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 98	29
Accumulated Amortization	(27)	(23)
Net Carrying Value	$ 71	6
Technology rights | Minimum
Finite-Lived Intangible Assets [Line Items]
Finite useful life of intangible assets	10 years
Technology rights | Maximum
Finite-Lived Intangible Assets [Line Items]
Finite useful life of intangible assets	30 years
Packaged kits know-how
Finite-Lived Intangible Assets [Line Items]
Finite useful life of intangible assets	10 years
Gross Carrying Value	$ 36	0
Accumulated Amortization	(1)	0
Net Carrying Value	35	0
Licensing agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	66	0
Accumulated Amortization	(3)	0
Net Carrying Value	$ 63	0
Licensing agreements | Minimum
Finite-Lived Intangible Assets [Line Items]
Finite useful life of intangible assets	3 years
Licensing agreements | Maximum
Finite-Lived Intangible Assets [Line Items]
Finite useful life of intangible assets	5 years
Land use rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 44	15
Accumulated Amortization	(2)	(2)
Net Carrying Value	$ 42	$ 13
Land use rights | Minimum
Finite-Lived Intangible Assets [Line Items]
Finite useful life of intangible assets	28 years
Land use rights | Maximum
Finite-Lived Intangible Assets [Line Items]
Finite useful life of intangible assets	46 years
Federal-Mogul
Finite-Lived Intangible Assets [Line Items]
Net Carrying Value	$ 1,165
Indefinite-lived intangible assets	$ 365

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets—Net - Amortization (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
2019	$ 124
2020	125
2021	124
2022	119
2023	116
2024 and thereafter	546
Net Carrying Value	$ 1,154	$ 22

Investment in Nonconsolidated_3

Investment in Nonconsolidated Affiliates (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Investments in nonconsolidated affiliates	$ 544	$ 2
Equity earnings (losses) of nonconsolidated affiliates, net of tax	18	(1)	$ 0
Cash dividends received from nonconsolidated affiliates	2	$ 0	$ 0
Amount equity method exceeded its share of the underlying net assets	$ 207
Futaba Tenneco U.K. Ltd. (UK)
Schedule of Equity Method Investments [Line Items]
Ownership percentage	0.00%	0.00%	49.00%
Montagewerk Abgastechnik Emden GmbH (Germany)
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50.00%	50.00%	50.00%
Anqing TP Goetze Piston Ring Company Limited (China)
Schedule of Equity Method Investments [Line Items]
Ownership percentage	35.70%
Anqing TP Powder Metallurgy Co., Ltd (China)
Schedule of Equity Method Investments [Line Items]
Ownership percentage	20.00%
Dongsuh Federal-Mogul Industrial Co. Ltd. (Korea)
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50.00%
Farloc Argentina SAIC Y F (Argentina)
Schedule of Equity Method Investments [Line Items]
Ownership percentage	23.90%
Federal-Mogul Powertrain Otomotiv A.S. (Turkey)
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50.00%
Federal-Mogul TP Liner Europe Otomotiv Ltd. Sti. (Turkey)
Schedule of Equity Method Investments [Line Items]
Ownership percentage	25.00%
Federal-Mogul TP Liners, Inc. (USA)
Schedule of Equity Method Investments [Line Items]
Ownership percentage	46.00%
Frenos Hidraulicos Automotrices, S.A. de C.V. (Mexico)
Schedule of Equity Method Investments [Line Items]
Ownership percentage	49.00%
JURID do Brasil Sistemas Automotivos Ltda. (Brazil)
Schedule of Equity Method Investments [Line Items]
Ownership percentage	19.90%
KB Autosys Co., Ltd. (Korea)
Schedule of Equity Method Investments [Line Items]
Ownership percentage	33.60%

Investment in Nonconsolidated_4

Investment in Nonconsolidated Affiliates - Summarized Financial Data (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)
Schedule of Equity Method Investments [Line Items]
Sales	$ 270
Gross profit	69
Income from continuing operations	49
Net income	42
Current assets	542
Noncurrent assets	632
Current liabilities	241
Noncurrent liabilities	93
Otomotiv A.S.
Schedule of Equity Method Investments [Line Items]
Sales	92
Gross profit	23
Income from continuing operations	26
Net income	22
Current assets	129
Noncurrent assets	300
Current liabilities	70
Noncurrent liabilities	82
Anqing TP Goetze
Schedule of Equity Method Investments [Line Items]
Sales	41
Gross profit	13
Income from continuing operations	13
Net income	12
Current assets	164
Noncurrent assets	132
Current liabilities	40
Noncurrent liabilities	0
Other
Schedule of Equity Method Investments [Line Items]
Sales	137
Gross profit	33
Income from continuing operations	10
Net income	8
Current assets	249
Noncurrent assets	200
Current liabilities	131
Noncurrent liabilities	$ 11

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Additional Information (Details) € in Millions	Dec. 31, 2018USD ($)shares	Dec. 31, 2018EUR (€)shares	Dec. 31, 2017USD ($)
Financial Instruments [Line Items]
Long-term debt	$ 5,340,000,000		$ 1,358,000,000
Foreign Exchange Forward
Financial Instruments [Line Items]
Fair value hedges	$ 1,000,000		1,000,000
Equity Swap
Financial Instruments [Line Items]
Notional amount | shares	250,000	250,000
Derivatives at fair value	$ 4,000,000		4,000,000
Commodity contracts
Financial Instruments [Line Items]
Notional amount	$ 27,000,000		$ 0
Net Investment Hedging
Financial Instruments [Line Items]
Long-term debt | €		€ 752

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities - Summarization for Foreign Currency Forward Purchase and Sale Contracts (Details) - Foreign Exchange Forward $ in Millions	Dec. 31, 2018USD ($)
Sell | Canadian dollars
Notional amount	$ 2
Sell | European euro
Notional amount	8
Sell | U.S. dollars
Notional amount	11
Purchase | European euro
Notional amount	1
Purchase | Polish zloty
Notional amount	35
Purchase | Mexican pesos
Notional amount	0
Purchase | U.S. dollars
Notional amount	$ 2

Derivatives and Hedging Activ_5

Derivatives and Hedging Activities - Carrying and Estimated Fair Value (Details) € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)	Dec. 31, 2018EUR (€)	Dec. 31, 2017USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 5,340		$ 1,358
Net derivative losses to be reclassified within twelve months, less than	1
Net Investment Hedging
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt | €		€ 752
Amount of gain (loss) recognized in accumulated OCI or OCL (effective portion)	(3)
Net Investment Hedging | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	863
Commodity contracts | Cash Flow Hedging | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liability	$ (2)

Debt and Other Financing Arra_3

Debt and Other Financing Arrangements - Summary of Long-Term Debt Obligations (Details)	Dec. 31, 2018USD ($)	Dec. 31, 2018EUR (€)	Dec. 31, 2017USD ($)
Debt Instrument [Line Items]
Carrying Amount	$ 5,413,000,000		$ 1,361,000,000
Less — maturities classified as current	73,000,000		3,000,000
Total long-term debt	5,340,000,000		1,358,000,000
Unamortized debt issuance costs	90,000,000		13,000,000
Debt Instrument, Unamortized Premium	(49,000,000)
Debt Instrument, Unamortized Discount			2,000,000
Line of Credit | Revolver Borrowings Due 2022
Debt Instrument [Line Items]
Principal	0		244,000,000
Carrying Amount	0		244,000,000
Term Loan | Tenneco Inc. Term Loan A
Debt Instrument [Line Items]
Principal	1,700,000,000		0
Carrying Amount	$ 1,691,000,000		0
Effective Interest Rate	6.16%	6.16%
Stated rate	1.75%	1.75%
Term Loan | Tenneco Inc. Term Loan B
Debt Instrument [Line Items]
Principal	$ 1,700,000,000		0
Carrying Amount	$ 1,629,000,000		0
Effective Interest Rate	8.88%	8.88%
Stated rate	2.75%	2.75%
Term Loan | Senior Tranche A Term Loan
Debt Instrument [Line Items]
Principal	$ 0		390,000,000
Carrying Amount	0		$ 388,000,000
Effective Interest Rate			2.90%
Senior Notes
Debt Instrument [Line Items]
Debt Instrument, Unamortized Premium	(54,000,000)
Senior Notes | 5 3/8% Senior Notes due 2024
Debt Instrument [Line Items]
Principal	225,000,000	€ 225,000,000	$ 225,000,000
Carrying Amount	$ 222,000,000		$ 222,000,000
Effective Interest Rate	5.609%	5.609%	5.609%
Stated rate	5.375%	5.375%
Senior Notes | 5.000% Senior Notes due 2026
Debt Instrument [Line Items]
Principal	$ 500,000,000	€ 500,000,000	$ 500,000,000
Carrying Amount	$ 493,000,000		$ 492,000,000
Effective Interest Rate	5.219%	5.219%	5.219%
Stated rate	5.00%	5.00%
Senior Notes | 4.875% Euro Fixed Rate Notes due 2022
Debt Instrument [Line Items]
Principal	$ 476,000,000	€ 415,000,000	$ 0
Carrying Amount	$ 496,000,000		0
Effective Interest Rate	3.599%	3.599%
Stated rate	4.875%	4.875%
Senior Notes | Euro Floating Rate Notes due 2024
Debt Instrument [Line Items]
Principal	$ 344,000,000	€ 300,000,000	0
Carrying Amount	$ 349,000,000		0
Effective Interest Rate	4.62%	4.62%
Stated rate	4.875%	4.875%
Senior Notes | 5.000% Euro Fixed Rate Notes due 2024
Debt Instrument [Line Items]
Principal	$ 401,000,000	€ 350,000,000	0
Carrying Amount	$ 427,000,000		0
Effective Interest Rate	3.823%	3.823%
Stated rate	5.00%	5.00%
Other Debt, primarily foreign instruments
Debt Instrument [Line Items]
Principal	$ 108,000,000		17,000,000
Carrying Amount	$ 106,000,000		$ 15,000,000

Fair Value of Financial Instr_3

Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Other debt | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including current maturities)	$ 106	$ 15
Level 2 | Term loans and senior notes | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including current maturities)	5,307	1,346
Level 2 | Term loans and senior notes | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including current maturities)	5,218	1,383
Level 2 | Equity swap agreement | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	4	4
Level 2 | Equity swap agreement | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	4	4
Level 2 | Commodity contracts | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liability	(2)	0
Level 2 | Commodity contracts | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liability	$ (2)	$ 0

Debt and Other Financing Arra_4

Debt and Other Financing Arrangements - Additional Information (Details)	2 Months Ended	12 Months Ended
	Mar. 14, 2019USD ($)	Dec. 31, 2018USD ($)quarterly_installment	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Debt Instrument [Line Items]
Long term debt maturities within the next twelve months		$ 175
Borrowings on revolving lines of credit		$ 5,149,000,000	$ 6,664,000,000	$ 5,417,000,000
Term Loan | Tenneco Inc. Term Loan A
Debt Instrument [Line Items]
Quarterly installments | quarterly_installment		19
Long term debt maturities within the next twelve months		$ 85,000,000
Term Loan | Tenneco Inc. Term Loan B
Debt Instrument [Line Items]
Quarterly installments | quarterly_installment		27
Repayments of principal percentage		400.00%
Long term debt maturities within the next twelve months		$ 17,000,000
Senior Notes | Euro Floating Rate Notes due 2024
Debt Instrument [Line Items]
Variable rate		0.00%
Installment One | Term Loan | Tenneco Inc. Term Loan A
Debt Instrument [Line Items]
Quarterly installments | quarterly_installment		7
Principal payment		$ 21,000,000
Installment Two | Term Loan | Tenneco Inc. Term Loan A
Debt Instrument [Line Items]
Quarterly installments | quarterly_installment		4
Principal payment		$ 32,000,000
Installment Three | Term Loan | Tenneco Inc. Term Loan A
Debt Instrument [Line Items]
Quarterly installments | quarterly_installment		8
Principal payment		$ 43,000,000
LIBOR | Senior Notes | Euro Floating Rate Notes due 2024
Debt Instrument [Line Items]
Variable rate		4.875%
Subsequent event
Debt Instrument [Line Items]
Borrowings on revolving lines of credit	$ 102,000,000

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill impairment charge	$ 3	$ 11	$ 0
Equity Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives at fair value	4	4
Ride Performance
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill impairment charge	$ 3	$ 7

Debt and Other Financing Arra_5

Debt and Other Financing Arrangements - Aggregate Maturities (Details)	Dec. 31, 2018USD ($)
Debt Disclosure [Abstract]
2019	$ 175
2020	114
2021	154
2022	692
2023	$ 1,249

Debt and Other Financing Arra_6

Debt and Other Financing Arrangements - Interest Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Debt Instrument, Unamortized Premium	$ 49
Interest Expense
Debt Instrument [Line Items]
Amortization of debt issuance fees	8	$ 4	$ 4
Prepayments and other current assets
Debt Instrument [Line Items]
Amortization of debt issuance fees	9
Senior Notes
Debt Instrument [Line Items]
Debt Instrument, Unamortized Premium	54
Interest income	$ 3

Debt and Other Financing Arra_7

Debt and Other Financing Arrangements - Short-Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Maturities classified as current	$ 73	$ 3
Short-term borrowings	66	80
Bank overdrafts	14	20
Total short-term debt	$ 153	$ 103

Debt and Other Financing Arra_8

Debt and Other Financing Arrangements - Notes Payable (Details)	Dec. 31, 2018	Dec. 31, 2017
Notes Payable Current
Short-term Debt [Line Items]
Weighted average interest rate on outstanding borrowings at end of year	4.40%	2.90%

Debt and Other Financing Arra_9

Debt and Other Financing Arrangements - Financing Arrangements (Details)	12 Months Ended
	Dec. 31, 2018USD ($)
Debt Instrument [Line Items]
Commitments	$ 5,054,000,000
Borrowings	3,451,000,000
Letters of Credit	27,000,000
Available	1,576,000,000
Tenneco Inc. revolving credit agreement
Debt Instrument [Line Items]
Commitments	1,500,000,000
Borrowings	0
Letters of Credit	24,000,000
Available	1,476,000,000
Tenneco Inc. Term Loan A
Debt Instrument [Line Items]
Commitments	1,700,000,000
Borrowings	1,700,000,000
Letters of Credit	0
Available	0
Tenneco Inc. Term Loan B
Debt Instrument [Line Items]
Commitments	1,700,000,000
Borrowings	1,700,000,000
Letters of Credit	0
Available	0
Subsidiaries’ credit agreements
Debt Instrument [Line Items]
Commitments	154,000,000
Borrowings	51,000,000
Letters of Credit	3,000,000
Available	$ 100,000,000

Debt and Other Financing Arr_10

Debt and Other Financing Arrangements - Credit Facilities (Details)	Oct. 01, 2018USD ($)	May 31, 2017USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Line of Credit Facility [Line Items]
Borrowing capacity			$ 5,054,000,000
Maximum Percentage Of Stock Of Certain First Tier Foreign Subsidiaries Pledged To Secure Senior Credit Facility			66.00%
Loss on extinguishment of debt			$ 10,000,000	$ 1,000,000	$ 24,000,000
Revolving Credit Facility
Line of Credit Facility [Line Items]
Loss on extinguishment of debt	$ 10,000,000	$ 1,000,000
Line of Credit
Line of Credit Facility [Line Items]
Borrowing capacity	4,900,000,000
Revolving Credit Facility
Line of Credit Facility [Line Items]
Borrowing capacity	$ 1,500,000,000
Debt term	5 years
Revolving Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Borrowing capacity	$ 1,500,000,000
Debt term	5 years
Term Loan A Facility
Line of Credit Facility [Line Items]
Borrowing capacity	$ 1,700,000,000
Debt term	5 years
Term Loan A Facility | Term Loan
Line of Credit Facility [Line Items]
Borrowing capacity	$ 1,700,000,000
Debt term	5 years
Term Loan B Facility
Line of Credit Facility [Line Items]
Borrowing capacity	$ 1,700,000,000
Debt term	7 years
Term Loan B Facility | Term Loan
Line of Credit Facility [Line Items]
Borrowing capacity	$ 1,700,000,000
Debt term	7 years
LIBOR | Term Loan A Facility | Term Loan
Line of Credit Facility [Line Items]
Variable rate	1.75%
LIBOR | Term Loan B Facility | Term Loan
Line of Credit Facility [Line Items]
Variable rate	2.75%
Debt Covenant, Term 1 | Line of Credit
Line of Credit Facility [Line Items]
Consolidated Net Leverage Ratio	4
Debt Covenant, Term 1 | LIBOR | Term Loan B Facility | Term Loan
Line of Credit Facility [Line Items]
Variable rate	3.00%
Debt Covenant, Term 2 | Line of Credit
Line of Credit Facility [Line Items]
Consolidated Net Leverage Ratio	3.75
Debt Covenant, Term 3 | Line of Credit
Line of Credit Facility [Line Items]
Consolidated Net Leverage Ratio	3.5
Debt Covenant, Term 4 | Line of Credit
Line of Credit Facility [Line Items]
Consolidated Net Leverage Ratio	2.75

Debt and Other Financing Arr_11

Debt and Other Financing Arrangements - Senior Notes (Details)	12 Months Ended
	Dec. 31, 2018USD ($)	Dec. 31, 2018EUR (€)	Dec. 31, 2017USD ($)
Debt Instrument [Line Items]
Line of credit facility letters of credit outstanding	$ 5,413,000,000		$ 1,361,000,000
Unamortized debt issuance costs	$ 90,000,000		13,000,000
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed	100.00%
Senior Notes
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed	100.00%
Senior Notes | 5 3/8% Senior Notes due 2024
Debt Instrument [Line Items]
Line of credit facility letters of credit outstanding	$ 222,000,000		222,000,000
Principal	$ 225,000,000	€ 225,000,000	225,000,000
Stated rate	5.375%	5.375%
Senior Notes | 5.000% Senior Notes due 2026
Debt Instrument [Line Items]
Line of credit facility letters of credit outstanding	$ 493,000,000		492,000,000
Principal	$ 500,000,000	€ 500,000,000	500,000,000
Stated rate	5.00%	5.00%
Senior Notes | 5.000% Euro Fixed Rate Notes due 2024
Debt Instrument [Line Items]
Line of credit facility letters of credit outstanding	$ 427,000,000		0
Principal	$ 401,000,000	€ 350,000,000	0
Stated rate	5.00%	5.00%
Senior Notes | 4.875% Euro Fixed Rate Notes due 2022
Debt Instrument [Line Items]
Line of credit facility letters of credit outstanding	$ 496,000,000		0
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed	100.00%
Principal	$ 476,000,000	€ 415,000,000	0
Stated rate	4.875%	4.875%
Senior Notes | Euro Floating Rate Notes due 2024
Debt Instrument [Line Items]
Line of credit facility letters of credit outstanding	$ 349,000,000		0
Principal	$ 344,000,000	€ 300,000,000	$ 0
Stated rate	4.875%	4.875%
Variable rate	0.00%
Debt Instrument, Redemption, Period One [Member] | Senior Notes | 5.000% Euro Fixed Rate Notes due 2024
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	40.00%
Stated rate	5.00%	5.00%
Debt Instrument, Redemption, Period One [Member] | Senior Notes | 4.875% Euro Fixed Rate Notes due 2022
Debt Instrument [Line Items]
Stated rate	4.875%	4.875%
Debt Instrument, Redemption, Period One [Member] | Revolving Credit Facility | 5 3/8% Senior Notes due 2024
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	35.00%
Debt Instrument, Redemption, Period Two [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed	101.00%
Debt Instrument, Redemption, Period Two [Member] | Senior Notes | 5 3/8% Senior Notes due 2024
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	105.00%
Debt Instrument, Redemption, Period Two [Member] | Senior Notes | 5.000% Euro Fixed Rate Notes due 2024
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	105.00%
Stated rate	5.00%	5.00%
Debt Instrument, Redemption, Period Three [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed	100.00%
Debt Instrument, Redemption, Period Three [Member] | Senior Notes | 4.875% Euro Fixed Rate Notes due 2022
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	104.875%
Stated rate	4.875%	4.875%
Debt Instrument, Redemption, Period Four [Member] | Senior Notes
Debt Instrument [Line Items]
Stated rate	101.00%	101.00%
LIBOR | Senior Notes | Euro Floating Rate Notes due 2024
Debt Instrument [Line Items]
Variable rate	4.875%

Debt and Other Financing Arr_12

Debt and Other Financing Arrangements - Accounts Receivable Securitization (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Accounts receivable outstanding and derecognized	$ 1,011	$ 406
Deferred purchase price receivable	154	114
Proceeds from factoring qualifying as sales	3,390	1,984	$ 1,770
Loss on sale of receivables	16,000,000	5,000,000	$ 5,000,000
Accounts Receivable Securitization Programs [Member]
Debt Instrument [Line Items]
Borrowings on securitization programs	$ 6,000,000	30,000,000
Carrying amount of assets pledged as collateral		$ 343,000,000

Accrued Expenses and Other Cu_3

Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Other Income and Expenses [Abstract]
Accrued rebates	$ 189	$ 68
Product return reserves	95	16
Restructuring liabilities	91	16
Legal reserves	71	88
Non-income tax payable	67	52
Pension and postretirement benefits liability	50	14
Accrued freight	48	26
Liabilities held for sale	39	0
Accrued warranty	39	23
Accrued interest	33	14
Accrued professional services	31	8
Environmental reserve	12	2
Other	236	97
Accrued expenses and other current liabilities	$ 1,001	$ 424

Pension Plans, Postretirement_3

Pension Plans, Postretirement and Other Employee Benefits - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Oct. 01, 2018
Pension and Other Postretirement Benefits Disclosure [Line Items]
Expense recorded relating to employee matching contribution			$ 43	$ 29	$ 28
Decrease in pension obligations	$ 66
Increase in AOCI	51		51
Increase in AOCI, net of tax	16		$ 16
Lump sum payments		$ 18		10
Non-cash charge		$ 72		6
Acceptable tolerance limit of investment allocations for securities			5.00%
Pension Plans
Pension and Other Postretirement Benefits Disclosure [Line Items]
Accumulated benefit obligation	2,225		$ 2,225	728
Other Postretirement Benefits Plans
Pension and Other Postretirement Benefits Disclosure [Line Items]
Expected contributions in 2019	28		28
Pension benefit obligations	$ 75		$ 75	$ 9
U.S.
Pension and Other Postretirement Benefits Disclosure [Line Items]
Targeted pension plan allocations in debt securities	49.00%		49.00%
U.S. | Pension Plans
Pension and Other Postretirement Benefits Disclosure [Line Items]
Expected contributions in 2019	$ 26		$ 26
Expected long-term return on plan assets			6.00%	7.75%	7.60%
U.S. | Equity securities
Pension and Other Postretirement Benefits Disclosure [Line Items]
Targeted pension plan allocations in debt securities	60.00%		60.00%
U.S. | Fixed income securities
Pension and Other Postretirement Benefits Disclosure [Line Items]
Targeted pension plan allocations in debt securities	15.00%		15.00%
U.S. | Debt Securities
Pension and Other Postretirement Benefits Disclosure [Line Items]
Targeted pension plan allocations in debt securities	15.00%		15.00%
U.S. | Other
Pension and Other Postretirement Benefits Disclosure [Line Items]
Targeted pension plan allocations in debt securities	10.00%		10.00%
Non-U.S. | Pension Plans
Pension and Other Postretirement Benefits Disclosure [Line Items]
Expected contributions in 2019	$ 42		$ 42
Expected long-term return on plan assets			4.20%	5.25%	5.70%
Federal-Mogul
Pension and Other Postretirement Benefits Disclosure [Line Items]
Pension and postretirement benefits acquired	$ 848		$ 848			$ 879

Pension Plans, Postretirement_4

Pension Plans, Postretirement and Other Employee Benefits - Summary of Amount Recognised in Balance Sheets for Pension Plans and Postretirement Benefit Plan (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Noncurrent liabilities	$ (1,167)	$ (268)
Pension Plans | U.S.
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at December 31 of the previous year	263	272
Federal-Mogul acquisition	1,064	0
Service cost	1	1
Interest cost	21	10	$ 15
Settlement	(1)	(7)
Curtailment	0	0
Administrative expenses/taxes paid	0	0
Plan amendments	0	0
Actuarial (gain)/loss	(12)	10
Benefits paid	(34)	(23)
Medicare subsidies received	0	0
Participants' contributions	0	0
Held for sale	0	0
Currency rate conversion	0	0
Benefit obligation at December 31	1,302	263	272
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance at December 31 of the previous year	202	192
Federal-Mogul acquisition	943	0
Settlement	(1)	(7)
Net realized/unrealized gains (loss)	(122)	22
Administrative expenses/taxes paid	0	0
Employer contributions	6	18
Medicare subsidies received	0	0
Participants' contributions	0	0
Benefits paid	(33)	(23)
Held for sale	0	0
Currency rate conversion	0	0
Ending Balance at December 31	995	202	192
Funded status of the plans	(307)	(61)
Noncurrent assets	0	0
Current liabilities	(5)	(2)
Noncurrent liabilities	(302)	(59)
Net amount recognized	(307)	(61)
Pension Plans | Non-U.S.
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at December 31 of the previous year	471	438
Federal-Mogul acquisition	545	0
Service cost	13	9
Interest cost	15	13	14
Settlement	(13)	(3)
Curtailment	0	0
Administrative expenses/taxes paid	(3)	(2)
Plan amendments	2	0
Actuarial (gain)/loss	(16)	(9)
Benefits paid	(22)	(18)
Medicare subsidies received	0	0
Participants' contributions	1	1
Held for sale	(16)	0
Currency rate conversion	(31)	42
Benefit obligation at December 31	946	471	438
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance at December 31 of the previous year	438	369
Federal-Mogul acquisition	81	0
Settlement	(14)	(3)
Net realized/unrealized gains (loss)	(1)	42
Administrative expenses/taxes paid	0	(2)
Employer contributions	21	14
Medicare subsidies received	0	0
Participants' contributions	1	1
Benefits paid	(25)	(18)
Held for sale	(10)	0
Currency rate conversion	(25)	35
Ending Balance at December 31	466	438	369
Funded status of the plans	(480)	(33)
Noncurrent assets	33	28
Current liabilities	(17)	(3)
Noncurrent liabilities	(496)	(58)
Net amount recognized	(480)	(33)
Other Postretirement Benefits Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at December 31 of the previous year	151	143
Federal-Mogul acquisition	263	0
Service cost	0	0
Interest cost	8	5	6
Settlement	0	0
Curtailment	(1)	0
Administrative expenses/taxes paid	0	0
Plan amendments	(66)	0
Actuarial (gain)/loss	(24)	12
Benefits paid	(15)	(10)
Medicare subsidies received	1	0
Participants' contributions	1	0
Held for sale	0	0
Currency rate conversion	4	1
Benefit obligation at December 31	322	151	143
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance at December 31 of the previous year	0	0
Federal-Mogul acquisition	0	0
Settlement	0	0
Net realized/unrealized gains (loss)	0	0
Administrative expenses/taxes paid	0	0
Employer contributions	13	10
Medicare subsidies received	1	0
Participants' contributions	1	0
Benefits paid	(15)	(10)
Held for sale	0	0
Currency rate conversion	0	0
Ending Balance at December 31	0	0	$ 0
Funded status of the plans	(322)	(151)
Noncurrent assets	0	0
Current liabilities	(28)	(9)
Noncurrent liabilities	(294)	(142)
Net amount recognized	(322)	(151)
Postretirement liability	$ 75	$ 9

Pension Plans, Postretirement_5

Pension Plans, Postretirement and Other Employee Benefits - Amounts to be Reflected as Component of Net Periodic Benefit Cost (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Pension Plans | U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net actuarial loss	$ 255	$ 130
Prior service cost	0	0
Total	255	130
Pension Plans | Non-U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net actuarial loss	80	91
Prior service cost	4	3
Total	84	94
Other Postretirement Benefits Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net actuarial loss	31	51
Prior service cost	(73)	0
Total	$ (42)	$ 51

Pension Plans, Postretirement_6

Pension Plans, Postretirement and Other Employee Benefits - Projected Benefit Obligation Accumulated Benefit Obligation and Fair Value of Plan Assets for All Pension Plans (Detail) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligation	$ 1,302,000,000	$ 263,000,000
Accumulated benefit obligation	1,302,000,000	263,000,000
Fair value of plan assets	995,000,000	202,000,000
Non-U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligation	620,000,000	117,000,000
Accumulated benefit obligation	606,000,000	112,000,000
Fair value of plan assets	111,000,000	56,000,000
Pension Plans | U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligation	1,302,000,000	263,000,000
Fair value of plan assets	995	202
Pension Plans | Non-U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligation	652,000,000	130,000,000
Fair value of plan assets	138	69
Other Postretirement Benefits Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligation	322,000,000	151,000,000
Fair value of plan assets	$ 0	$ 0

Pension Plans, Postretirement_7

Pension Plans, Postretirement and Other Employee Benefits - Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pension Plans | U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1	$ 1	$ 1
Interest cost	21	10	15
Expected return on plan assets	(28)	(14)	(23)
Curtailment loss	0	0	0
Settlement loss	1	8	72
Net Amortization [Abstract]
Actuarial loss	5	5	8
Prior service cost (credit)	0	0	0
Net periodic costs	0	10	73
Pension Plans | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	14	9	8
Interest cost	15	13	14
Expected return on plan assets	(18)	(25)	(20)
Curtailment loss	0	0	0
Settlement loss	3	1	0
Net Amortization [Abstract]
Actuarial loss	6	9	7
Prior service cost (credit)	1	1	1
Net periodic costs	21	8	10
Other Postretirement Benefits Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0
Interest cost	8	5	6
Expected return on plan assets	0	0	0
Curtailment loss	1	0	0
Settlement loss	0	0	0
Net Amortization [Abstract]
Actuarial loss	5	4	5
Prior service cost (credit)	0	(1)	(1)
Net periodic costs	$ 14	$ 8	$ 10

Pension Plans, Postretirement_8

Pension Plans, Postretirement and Other Employee Benefits - Weighted Average Assumptions Used to Determine Benefit Obligations (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pension Plans | U.S.
Weighted-average assumptions used to determine benefit obligations
Discount rate	4.20%	3.80%	4.20%
Discount rate, Net Periodic Benefit Cost	4.10%	4.20%	4.30%
Expected long-term return on plan assets	6.00%	7.75%	7.60%
Pension Plans | Non-U.S.
Weighted-average assumptions used to determine benefit obligations
Discount rate	2.60%	2.60%	2.80%
Rate of compensation increase	0.00%	2.50%	2.50%
Discount rate, Net Periodic Benefit Cost	2.40%	2.80%	3.50%
Expected long-term return on plan assets	4.20%	5.25%	5.70%
Rate of compensation increase	2.90%	2.50%	2.70%
Other Postretirement Benefits Plans
Weighted-average assumptions used to determine benefit obligations
Discount rate	4.30%	3.80%	4.20%
Discount rate, Net Periodic Benefit Cost	4.20%	4.20%	4.30%

Pension Plans, Postretirement_9

Pension Plans, Postretirement and Other Employee Benefits - Amounts to be Reflected as Component of Net Periodic Cost (Detail) $ in Millions	Dec. 31, 2018USD ($)
Other Postretirement Benefits Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 4
Prior service cost	(8)
Total	(4)
U.S. | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	5
Prior service cost	0
Total	5
Non-U.S. | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	5
Prior service cost	1
Total	$ 6

Pension Plans, Postretiremen_10

Pension Plans, Postretirement and Other Employee Benefits - Estimated Pension Plan Benefit Payments (Detail) $ in Millions	Dec. 31, 2018USD ($)
Pension Plans | U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2019	$ 100
2020	99
2021	99
2022	101
2023	100
2024-2028	442
Pension Plans | Non-U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2019	43
2020	44
2021	43
2022	45
2023	49
2024-2028	243
Other Postretirement Benefits Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2019	28
2020	28
2021	27
2022	26
2023	26
2024-2028	$ 113

Pension Plans, Postretiremen_11

Pension Plans, Postretirement and Other Employee Benefits - Healthcare Trend (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Initial health care cost trend rate	6.90%	6.80%	7.00%
Ultimate health care cost trend rate	4.90%	4.50%	4.50%
Other Postretirement Benefits Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
100 basis point (bp) increase in health care cost trend rate	$ 23
100 bp decrease in health care cost trend rate	(20)
Maximum | Other Postretirement Benefits Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
100 basis point (bp) increase in health care cost trend rate, Total Interest and Service Costs	1
100 bp decrease in health care cost trend rate, Total Interest and Service Costs	$ (1)

Pension Plans, Postretiremen_12

Pension Plans, Postretirement and Other Employee Benefits - Pension Plan Assets Classes of Securities (Detail)	Dec. 31, 2018
U.S. | Equity securities
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Debt Securities	62.00%
U.S. | Fixed income securities
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Debt Securities	17.00%
U.S. | Debt Securities
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Debt Securities	11.00%
U.S. | Insurance contracts
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Debt Securities	0.00%
U.S. | Other
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Debt Securities	10.00%
Non-U.S. | Equity securities
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Debt Securities	32.00%
Non-U.S. | Fixed income securities
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Debt Securities	5.00%
Non-U.S. | Debt Securities
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Debt Securities	43.00%
Non-U.S. | Insurance contracts
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Debt Securities	15.00%
Non-U.S. | Other
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Debt Securities	5.00%

Pension Plans, Postretiremen_13

Pension Plans, Postretirement and Other Employee Benefits - Plan Assets Using Fair Value Hierarchy (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
U.S. | Level 3
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Net plan assets	$ 28	$ 0	$ 0
Non-U.S. | Level 3
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Net plan assets	71	9	9
Pension Plans | U.S.
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	837	23
Plan assets measured at net asset value	158	179
Net plan assets	995	202	192
Pension Plans | U.S. | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	194	21
Plan assets measured at net asset value	104	120
Pension Plans | U.S. | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	18	0
Plan assets measured at net asset value	54	59
Pension Plans | U.S. | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	33	0
Plan assets measured at net asset value	0	0
Pension Plans | U.S. | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Insurance contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Hedge funds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	28
Pension Plans | U.S. | Cash and equivalents
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	33	2
Pension Plans | U.S. | Level 1
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	770	23
Pension Plans | U.S. | Level 1 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	194	21
Pension Plans | U.S. | Level 1 | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 1 | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	12	0
Pension Plans | U.S. | Level 1 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 1 | Insurance contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 1 | Hedge funds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Pension Plans | U.S. | Level 1 | Cash and equivalents
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	33	2
Pension Plans | U.S. | Level 2
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	39	0
Pension Plans | U.S. | Level 2 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 2 | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	18	0
Pension Plans | U.S. | Level 2 | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	21	0
Pension Plans | U.S. | Level 2 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 2 | Insurance contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 2 | Hedge funds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Pension Plans | U.S. | Level 2 | Cash and equivalents
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 3
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	28	0
Pension Plans | U.S. | Level 3 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 3 | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 3 | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 3 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 3 | Insurance contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 3 | Hedge funds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	28
Pension Plans | U.S. | Level 3 | Cash and equivalents
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | Non-U.S.
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	341	295
Plan assets measured at net asset value	125	143
Net plan assets	466	438	$ 369
Pension Plans | Non-U.S. | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	69	117
Plan assets measured at net asset value	81	97
Pension Plans | Non-U.S. | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	8	22
Plan assets measured at net asset value	14	14
Pension Plans | Non-U.S. | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	149	114
Plan assets measured at net asset value	30	32
Pension Plans | Non-U.S. | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	5	7
Pension Plans | Non-U.S. | Insurance contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	71	25
Pension Plans | Non-U.S. | Hedge funds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Pension Plans | Non-U.S. | Cash and equivalents
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	17	10
Pension Plans | Non-U.S. | Level 1
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	64	34
Pension Plans | Non-U.S. | Level 1 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	14	16
Pension Plans | Non-U.S. | Level 1 | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	8	6
Pension Plans | Non-U.S. | Level 1 | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	2	2
Pension Plans | Non-U.S. | Level 1 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	1	1
Pension Plans | Non-U.S. | Level 1 | Insurance contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | Non-U.S. | Level 1 | Hedge funds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Pension Plans | Non-U.S. | Level 1 | Cash and equivalents
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	17	9
Pension Plans | Non-U.S. | Level 2
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	206	252
Pension Plans | Non-U.S. | Level 2 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	55	101
Pension Plans | Non-U.S. | Level 2 | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	16
Pension Plans | Non-U.S. | Level 2 | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	147	112
Pension Plans | Non-U.S. | Level 2 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	4	6
Pension Plans | Non-U.S. | Level 2 | Insurance contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	16
Pension Plans | Non-U.S. | Level 2 | Hedge funds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Pension Plans | Non-U.S. | Level 2 | Cash and equivalents
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	1
Pension Plans | Non-U.S. | Level 3
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	71	9
Pension Plans | Non-U.S. | Level 3 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | Non-U.S. | Level 3 | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | Non-U.S. | Level 3 | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | Non-U.S. | Level 3 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | Non-U.S. | Level 3 | Insurance contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	71	9
Pension Plans | Non-U.S. | Level 3 | Hedge funds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Pension Plans | Non-U.S. | Level 3 | Cash and equivalents
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	$ 0
Registered Investment Company [Member] | Pension Plans | U.S. | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	323
Registered Investment Company [Member] | Pension Plans | U.S. | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	167
Registered Investment Company [Member] | Pension Plans | U.S. | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	41
Registered Investment Company [Member] | Pension Plans | U.S. | Level 1 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	323
Registered Investment Company [Member] | Pension Plans | U.S. | Level 1 | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	167
Registered Investment Company [Member] | Pension Plans | U.S. | Level 1 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	41
Registered Investment Company [Member] | Pension Plans | U.S. | Level 2 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | U.S. | Level 2 | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | U.S. | Level 2 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | U.S. | Level 3 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | U.S. | Level 3 | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | U.S. | Level 3 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	1
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	21
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Level 1 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	1
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Level 1 | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	21
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Level 1 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Level 2 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Level 2 | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Level 2 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Level 3 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Level 3 | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Level 3 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	$ 0

Pension Plans, Postretiremen_14

Pension Plans, Postretirement and Other Employee Benefits - Changes in Fair Value of Level 3 Assets (Detail) - Level 3 - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
U.S.
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Balance at December 31 of the previous year	$ 0	$ 0
Federal-Mogul acquisition	30	0
Net realized/unrealized gains (loss)	(2)	0
Purchases and settlements—net	0	0
Sales—net	0	0
Transfers into (out) of Level 3	0	0
Held for sale	0
Foreign currency exchange rate movements	0	0
Ending Balance at December 31	28	0
Non-U.S.
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Balance at December 31 of the previous year	9	9
Federal-Mogul acquisition	56	0
Net realized/unrealized gains (loss)	1	0
Purchases and settlements—net	0	0
Sales—net	0	0
Transfers into (out) of Level 3	15	0
Held for sale	(10)
Foreign currency exchange rate movements	0	0
Ending Balance at December 31	$ 71	$ 9

Pension Plans, Postretiremen_15

Pension Plans, Postretirement and Other Employee Benefits - Significant Concentrations of Risk (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Investment in Tenneco stock	$ 1	$ 1
Level 1
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Investment in Tenneco stock	$ 10	$ 21
Investment in Tenneco stock as a percentage of total plan assets	0.70%	3.30%

Income Taxes - Income before in

Income Taxes - Income before income taxes and noncontrolling interests (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
U.S. income earnings (loss) before income taxes	$ (138)	$ (28)	$ 52
Foreign earnings (loss) before income taxes	312	364	359
Earnings before income taxes and noncontrolling interests	$ 174	$ 336	$ 411

Income Taxes - Comparative Anal

Income Taxes - Comparative Analysis of Components of Income Tax Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current
U.S. federal	$ 8	$ (23)	$ (9)
State and local	1	1	4
Foreign	119	101	85
Total current income tax expenses	128	79	80
Deferred
U.S. federal	(35)	16	(95)
State and local	(5)	(3)	(1)
Foreign	(25)	(21)	12
Total deferred income tax expenses	(65)	(8)	(84)
Income tax expense	$ 63	$ 71	$ (4)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
U.S. Federal statutory rate	21.00%	35.00%	35.00%
Income tax expense (benefit)	$ 63	$ 71	$ (4)
Valuation allowance	514	163
Income Tax Expense (Benefit), Discrete Charge	11
Transition Tax under Tax Cuts and Jobs Act (TCJA)	11	43	0
Provisional expense for deferred tax assets		51
Foreign earnings subject to U.S. federal income tax	9	(74)	(101)
Reducing In Tax Loss Carryforward Due To Realization Domestic And State Tax Loss	2
Unremitted earnings of foreign subsidiaries	2,600
Estimated income tax liability related to unremitted earnings of foreign subsidiaries	117
Uncertain tax positions that would affect the effective tax rate if recognized	134	108	108
Liability for interest on unrecognized tax benefits	11	4	4
Estimated decrease in unrecognized tax benefits related to the expiration of foreign statute of limitations and the conclusion of foreign income tax examinations that may occur within the coming year	14
Reducing in Tax Loss Carryforward Due To Realization Foreign Tax Loss	68	7
Maximum
Schedule of Equity Method Investments [Line Items]
Penalties accrued	1	1	1
Accrued interest related to uncertain tax positions	2	1	1
Liability for penalties on unrecognized tax benefits	12	1
Domestic Tax Authority [Member]
Schedule of Equity Method Investments [Line Items]
Foreign earnings subject to U.S. federal income tax		(74)	$ (110)
Australia
Schedule of Equity Method Investments [Line Items]
Valuation allowance	$ 10
Spain, China, and Czech Republic
Schedule of Equity Method Investments [Line Items]
Transition Tax under Tax Cuts and Jobs Act (TCJA)		$ 51

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Income Taxes Computed at Statutory U.S. Federal Income Tax Rate to Income Tax Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income tax expense computed at the statutory U.S. federal income tax rate	$ 37	$ 117	$ 144
Foreign income taxed at different rates	19	(48)	(42)
Transition Tax under Tax Cuts and Jobs Act (TCJA)	11	43	0
Remeasurement of estimated tax on unremitted earnings	0	53	0
State and local taxes on income, net of U.S. federal income tax benefit	(6)	(2)	3
Changes in valuation allowance for tax loss carryforwards and credits	0	(1)	18
Investment and R&D tax credits	(12)	(6)	(6)
Foreign earnings subject to U.S. federal income tax	9	(74)	(101)
Tax contingencies	1	(1)	(7)
Other	4	(10)	(13)
Income tax expense	$ 63	$ 71	$ (4)

Income Taxes - Components of Ou

Income Taxes - Components of Our Net Deferred Tax Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
State	$ 18	$ 19
Foreign	364	114
Tax credits	159	118
Postretirement benefits other than pensions	21	37
Pensions	158	24
Payroll and other accruals	24	18
Book over tax depreciation	68	(45)
Other accruals	163	80
Valuation allowance	(514)	(163)
Total deferred tax assets	461	202
Amortization of intangibles	82	0
Total deferred tax liabilities	82	0
Net deferred tax assets	$ 379	$ 202

Income Taxes - Reconciliation_2

Income Taxes - Reconciliation of Deferred Taxes to Deferred Taxes Shown In Balance Sheet (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Balance Sheet:
Non-current portion - deferred tax asset	$ 467	$ 213
Non-current portion - deferred tax liability	(88)	(11)
Net deferred tax assets	$ 379	$ 202

Income Taxes - Reconciliation_3

Income Taxes - Reconciliation of our Uncertain Tax Positions (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Uncertain tax positions -
Balance January 1	$ 112	$ 111	$ 123
Gross increases in tax positions due to acquisition	110	0	0
Gross increases in tax positions in current period	8	6	6
Gross increases in tax positions in prior period	7	2	2
Gross decreases in tax positions in prior period	(1)	(2)	(5)
Gross decreases - settlements	(2)	0	0
Gross decreases - statute of limitations expired	(10)	(5)	(15)
Balance December 31	$ 224	$ 112	$ 111

Income Taxes - Tax Years Open t

Income Taxes - Tax Years Open to Examination in Primary Jurisdictions (Detail)	12 Months Ended
	Dec. 31, 2018
United States
Income Tax Contingency [Line Items]
Tax years open to examination in primary jurisdictions	2003
Belgium
Income Tax Contingency [Line Items]
Tax years open to examination in primary jurisdictions	2016
Brazil
Income Tax Contingency [Line Items]
Tax years open to examination in primary jurisdictions	2014
China
Income Tax Contingency [Line Items]
Tax years open to examination in primary jurisdictions	2009
Germany
Income Tax Contingency [Line Items]
Tax years open to examination in primary jurisdictions	2009
Mexico
Income Tax Contingency [Line Items]
Tax years open to examination in primary jurisdictions	2013
Poland
Income Tax Contingency [Line Items]
Tax years open to examination in primary jurisdictions	2013
Spain
Income Tax Contingency [Line Items]
Tax years open to examination in primary jurisdictions	2000
United Kingdom
Income Tax Contingency [Line Items]
Tax years open to examination in primary jurisdictions	2015
Italy
Income Tax Contingency [Line Items]
Tax years open to examination in primary jurisdictions	2013
France
Income Tax Contingency [Line Items]
Tax years open to examination in primary jurisdictions	2009
India
Income Tax Contingency [Line Items]
Tax years open to examination in primary jurisdictions	1995

Commitments and Contingencies -

Commitments and Contingencies - Capital and Lease Commitments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Estimate of authorized expenditures required to complete facilities and projects	$ 181
Total rental expense	111	$ 81	$ 74
Operating Leases, 2019	120
Operating Leases, 2020	100
Operating Leases, 2021	86
Operating Leases, 2022	68
Operating Leases, 2023	56
Operating Leases, Beyond 2023	53
Operating Leases, Total minimum lease payments	483
Capital leased assets	2	$ 1
Capital Lease, 2019	1
Capital Lease, 2020	1
Capital Lease, 2021	1
Capital Lease, 2022	1
Capital Lease, 2023	$ 1

Commitments and Contingencies_2

Commitments and Contingencies - Environmental Matters (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Environmental remediation accrual, discounted basis	$ 40
Portion of environmental remediation costs recorded in other current liabilities	12
Portion of environmental remediation costs recorded in deferred credits and other liabilities	$ 28
Weighted average discount rate	2.90%
Environmental remediation accrual, undiscounted basis	$ 46
Expected payments of environmental remediation costs, 2019	10
Expected payments of environmental remediation costs, 2020	6
Expected payments of environmental remediation costs, 2021	3
Expected payments of environmental remediation costs, 2022	3
Expected payments of environmental remediation costs, 2023	2
Expected payments of environmental remediation costs, thereafter	16
Future Property, Plant And Equipment, Estimated Environmental Costs, Next Twelve Months	14
Future Property, Plant And Equipment, Estimated Environmental Costs, Year Two	7
Estimated liability	53	$ 132
Payments for settlement	$ 79

Commitments and Contingencies_3

Commitments and Contingencies - Other Legal Proceedings, Claims and Investigations (Details)	9 Months Ended
	Sep. 30, 2015LegalMatterdefendent
Loss Contingencies [Line Items]
Number of defendants in many asbestos related cases | defendent	100
United States
Loss Contingencies [Line Items]
Current docket of active and inactive cases nationwide relating to alleged exposure to asbestos from our product categories	500
Europe
Loss Contingencies [Line Items]
Current docket of active and inactive cases nationwide relating to alleged exposure to asbestos from our product categories	50

Commitments and Contingencies_4

Commitments and Contingencies - Asset Retirement Obligations (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)
Loss Contingencies [Line Items]
Asset retirement obligation	$ 0
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance as of December 31, 2017	0
Acquisition of Federal-Mogul	12
Liabilities incurred	3
Liabilities settled/adjustments	0
Balance as of December 31, 2018	15
Accrued expenses and other current liabilities
Loss Contingencies [Line Items]
Asset retirement obligation	3
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance as of December 31, 2018	3
Deferred credits and other liabilities
Loss Contingencies [Line Items]
Asset retirement obligation	12
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance as of December 31, 2018	$ 12

Commitments and Contingencies_5

Commitments and Contingencies - Warranty Accrual Table (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning balance	$ 32	$ 27	$ 23
Acquisition of Federal-Mogul	17	0	0
Accruals related to product warranties	14	15	19
Reductions for payments made	(18)	(10)	(15)
Ending balance	$ 45	$ 32	$ 27

Share-Based Compensation - Narr

Share-Based Compensation - Narrative (Details) - USD ($)	1 Months Ended	12 Months Ended
	Dec. 31, 1999	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Oct. 01, 2018	Sep. 30, 2018	Sep. 12, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Intrinsic value of options exercised		$ 1,000,000	$ 6,000,000	$ 11,000,000
Total fair value of shares vested		$ 0	2,000,000	4,000,000
Authorized common stock available for issuance under the plan					250,000,000	135,000,000
Term for stock options (in years)	3 years
Award performance period		1 year
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term for stock options (in years)		7 years
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restriction period for restricted common stock		3 years
Unrecognized compensation expense		$ 25,000,000
Unrecognized compensation expense period		2 years
PSUs | 2012 Through 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restriction period for restricted common stock		3 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total fair value of restricted shares vested		$ 11,000,000	14,000,000	9,000,000
LTPU and RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restriction period for restricted common stock		3 years
LTPU and RSU [Member] | Performance Targets, Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		50.00%
LTPU and RSU [Member] | Market Targets, Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		50.00%
Cash Settled Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		$ (1,000,000)	4,000,000	10,000,000
Unrecognized compensation expense		2,000,000
Share-Settled RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		11,000,000	11,000,000	9,000,000
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense		0
Cash received from stock option exercises		1,000,000	8,000,000	16,000,000
Tax benefit from exercise of stock options		$ 1,000,000	$ 2,000,000	$ 1,000,000
2006 Long-Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized common stock available for issuance under the plan							3,000,000
Shares of common stock remain authorized for delivery		4,034,413
2006 Long-Term Incentive Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock remain authorized for delivery		14,800,000
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restriction period for restricted common stock		3 years

Share-Based Compensation - Stoc

Share-Based Compensation - Stock Options Status and Activity (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Aggregate Intrinsic Value, Exercised	$ 1	$ 6	$ 11
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Shares Under Option Outstanding Beginning Balance (in shares)	318,016
Granted (in shares)	0
Exercised (in shares)	(21,823)
Forfeited (in shares)	(2,196)
Shares Under Option Outstanding Ending Balance (in shares)	293,997	318,016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Prices, Outstanding, Beginning Balance (in dollars per share)	$ 46.18
Granted (in dollars per share)	0
Exercised (in dollars per share)	29.79
Forfeited (in dollars per share)	55.50
Weighted Average Exercise Prices, Outstanding, Ending Balance (in dollars per share)	$ 46.89	$ 46.18
Weighted Average Remaining Life in Years	1 year 5 months	2 years 4 months
Aggregate Intrinsic Value, Outstanding, Beginning Balance	$ 5
Aggregate Intrinsic Value, Outstanding, Ending Balance	$ 0	$ 5

Share-Based Compensation - Nonv

Share-Based Compensation - Nonvested Restricted Shares (Detail)	12 Months Ended
	Dec. 31, 2018$ / sharesshares
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested Restricted Shares, Beginning Balance (in shares) | shares	410,251
Granted (in shares) | shares	19,727
Vested (in shares) | shares	(237,342)
Forfeited (in shares) | shares	(14,086)
Nonvested Restricted Shares, Ending Balance (in shares) | shares	178,550
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Nonvested, Weighted Average Grant Date Fair Value, Beginning of Period | $ / shares	$ 53.36
Granted | $ / shares	54.19
Vested | $ / shares	51.17
Forfeited | $ / shares	60.87
Nonvested, Weighted Average Grant Date Fair Value, End of Period | $ / shares	$ 55.46
Share-Settled RSUs
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested Restricted Shares, Beginning Balance (in shares) | shares	0
Granted (in shares) | shares	467,358
Vested (in shares) | shares	(192)
Forfeited (in shares) | shares	(26,763)
Nonvested Restricted Shares, Ending Balance (in shares) | shares	440,403
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Nonvested, Weighted Average Grant Date Fair Value, Beginning of Period | $ / shares	$ 0
Granted | $ / shares	48.48
Vested | $ / shares	55.04
Forfeited | $ / shares	55.04
Nonvested, Weighted Average Grant Date Fair Value, End of Period | $ / shares	$ 47.99
PSUs
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested Restricted Shares, Beginning Balance (in shares) | shares	0
Granted (in shares) | shares	248,928
Vested (in shares) | shares	0
Forfeited (in shares) | shares	(21,879)
Nonvested Restricted Shares, Ending Balance (in shares) | shares	227,049
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Nonvested, Weighted Average Grant Date Fair Value, Beginning of Period | $ / shares	$ 0
Granted | $ / shares	49.32
Vested | $ / shares	0
Forfeited | $ / shares	50.75
Nonvested, Weighted Average Grant Date Fair Value, End of Period | $ / shares	$ 49.18

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Details) - USD ($)	Oct. 01, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2015	Sep. 30, 2018	Feb. 28, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Authorized common stock available for issuance under the plan	250,000,000				135,000,000
Common stock, par value (in dollars per share)					$ 0.01
Authorized amount		$ 0
Shares repurchased		0
Treasury stock		14,592,888	14,592,888
Authorized shares (in shares)	50,000,000	50,000,000	50,000,000		50,000,000
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Outstanding shares (in shares)		0
Class A
Class of Stock [Line Items]
Authorized common stock available for issuance under the plan	175,000,000	175,000,000	135,000,000
Common stock, par value (in dollars per share)		$ 0.01	$ 0.01
Treasury stock		14,592,888					11,655,938
Class B
Class of Stock [Line Items]
Authorized common stock available for issuance under the plan		25,000,000
Common stock, par value (in dollars per share)		$ 0.01
Treasury stock							0
Common Stock | Federal-Mogul
Class of Stock [Line Items]
Tenneco shares issued for purchase of Federal-Mogul	29,444,846
Common Stock | Federal-Mogul | Class A
Class of Stock [Line Items]
Common stock, par value (in dollars per share)	$ 0.01
Tenneco shares issued for purchase of Federal-Mogul	5,651,177
2015 Program
Class of Stock [Line Items]
Authorized amount				$ 550,000,000
Remaining amount authorized to be repurchased						$ 112,000,000
Shares repurchased				4,182,613
Value of shares repurchased				$ 225,000,000
Treasury stock average cost per share				$ 53.89
2017 Program
Class of Stock [Line Items]
Authorized amount						$ 400,000,000
Remaining amount authorized to be repurchased		$ 231,000,000
Shares repurchased			2,936,950
Value of shares repurchased			$ 169,000,000
Treasury stock average cost per share			$ 57.57

Shareholders' Equity (Details)

Shareholders' Equity (Details) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury stock	14,592,888	14,592,888
Class A
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued, beginning balance	66,033,509	65,891,930	65,067,132
Share issuances	5,651,177	0	0
Issuance pursuant to benefit plans	19,919	34,760	292,514
Restricted stock forfeited and withheld for taxes	(51,049)	(126,682)	0
Stock options exercised	21,823	233,501	532,284
Shares issued, ending balance	71,675,379	66,033,509	65,891,930
Treasury stock	14,592,888		11,655,938
Treasury stock	57,082,491	51,440,621	54,235,992
Class B
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued, beginning balance	0
Share issuances	23,793,669
Issuance pursuant to benefit plans	0
Restricted stock forfeited and withheld for taxes	0
Stock options exercised	0
Shares issued, ending balance	23,793,669	0
Treasury stock			0
Treasury stock	23,793,669

Changes in Accumulated Other _3

Changes in Accumulated Other Comprehensive Income (Loss) by Component (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	$ 682
Other comprehensive income (loss), net of tax	(156)	$ 123	$ (5)
Balance at end of period	1,916	682
Other comprehensive income (loss) attributable to noncontrolling interests, net of tax	(2)	2	(4)
Foreign currency translation adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	(263)	(367)	(315)
Other comprehensive income (loss) before reclassifications	(134)	104	(49)
Income tax provision (benefit)	0	0	(3)
Other comprehensive income (loss), net of tax	(132)	104	(52)
Balance at end of period	(395)	(263)	(367)
Pension and postretirement benefits:
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	(275)	(292)	(343)
Other comprehensive income (loss) before reclassifications	(47)	2	61
Reclassification to earnings	22	26	19
Other comprehensive income (loss) before tax	(25)	28	80
Income tax provision (benefit)	3	(11)	(29)
Other comprehensive income (loss), net of tax	(22)	17	51
Balance at end of period	$ (297)	$ (275)	$ (292)

Earnings Per Share - Summary of

Earnings Per Share - Summary of Earnings Per Share of Common Stock (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Basic earnings per share —
Net income attributable to Tenneco Inc.	$ (109)	$ 57	$ 47	$ 60	$ 62	$ 80	$ (5)	$ 61	$ 55	$ 198	$ 347
Average shares of common stock outstanding (in shares)									58,625,087	52,796,184	55,939,135
Basic earnings per share of common stock (in dollars per share)	$ (1.35)	$ 1.11	$ 0.92	$ 1.17	$ 1.19	$ 1.53	$ (0.09)	$ 1.13	$ 0.93	$ 3.75	$ 6.20
Diluted earnings per share —
Average shares of common stock outstanding (in shares)									58,625,087	52,796,184	55,939,135
Effect of dilutive securities:
Restricted stock (in shares)									93,546	111,062	175,513
Stock options (in shares)									40,099	119,665	292,788
Average shares of common stock outstanding including dilutive securities (in shares)									58,758,732	53,026,911	56,407,436
Earnings per average share of common stock (in dollars per share)	$ (1.35)	$ 1.11	$ 0.92	$ 1.17	$ 1.19	$ 1.53	$ (0.09)	$ 1.12	$ 0.93	$ 3.73	$ 6.15

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Details) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Anti-dilutive stock options	257,567	834	134,361

Segment and Geographic Area I_3

Segment and Geographic Area Information - Additional Information (Details)	9 Months Ended
	Sep. 30, 2018Segment
Segment Reporting [Abstract]
Number of Reportable Segments	3

Segment and Geographic Area I_4

Segment and Geographic Area Information - Segment Information (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting [Line Items]
Net sales and operating revenues	$ 4,278,000,000	$ 2,371,000,000	$ 2,533,000,000	$ 2,581,000,000	$ 2,389,000,000	$ 2,273,000,000	$ 2,314,000,000	$ 2,298,000,000	$ 11,763,000,000	$ 9,274,000,000	$ 8,597,000,000
Revenues from external customers									11,763,000,000	9,274,000,000	8,597,000,000
EBITDA including noncontrolling interests									651,000,000	634,000,000	692,000,000
Less: Depreciation and amortization									(345,000,000)	(226,000,000)	(213,000,000)
Earnings before interest expense, income taxes, and noncontrolling interests	$ (31,000,000)	$ 109,000,000	$ 109,000,000	$ 119,000,000	$ 132,000,000	$ 131,000,000	$ 23,000,000	$ 122,000,000	306,000,000	408,000,000	479,000,000
Interest expense									132,000,000	72,000,000	68,000,000
Income tax expense (benefit)									63,000,000	71,000,000	(4,000,000)
Net income									111,000,000	265,000,000	415,000,000
Clean Air
Segment Reporting [Line Items]
Net sales and operating revenues									6,707,000,000	6,216,000,000	5,764,000,000
Ride Performance
Segment Reporting [Line Items]
Net sales and operating revenues									1,949,000,000	1,807,000,000	1,593,000,000
Aftermarket
Segment Reporting [Line Items]
Net sales and operating revenues									1,221,000,000	1,251,000,000	1,240,000,000
Powertrain
Segment Reporting [Line Items]
Net sales and operating revenues									1,112,000,000	0	0
Motorparts
Segment Reporting [Line Items]
Net sales and operating revenues									774,000,000	0	0
Intersegment revenues
Segment Reporting [Line Items]
Revenues from external customers									0	0	0
Total
Segment Reporting [Line Items]
Net sales and operating revenues									11,763,000,000	9,274,000,000	8,597,000,000
EBITDA including noncontrolling interests									885,000,000	879,000,000	921,000,000
Total | Clean Air
Segment Reporting [Line Items]
Net sales and operating revenues									6,707,000,000	6,216,000,000	5,764,000,000
EBITDA including noncontrolling interests									597,000,000	562,000,000	561,000,000
Total | Ride Performance
Segment Reporting [Line Items]
Net sales and operating revenues									1,949,000,000	1,807,000,000	1,593,000,000
EBITDA including noncontrolling interests									66,000,000	124,000,000	153,000,000
Total | Aftermarket
Segment Reporting [Line Items]
Net sales and operating revenues									1,221,000,000	1,251,000,000	1,240,000,000
EBITDA including noncontrolling interests									169,000,000	193,000,000	207,000,000
Total | Powertrain
Segment Reporting [Line Items]
Net sales and operating revenues									1,112,000,000	0	0
EBITDA including noncontrolling interests									92,000,000	0	0
Total | Motorparts
Segment Reporting [Line Items]
Net sales and operating revenues									774,000,000	0	0
EBITDA including noncontrolling interests									(39,000,000)	0	0
Total | Intersegment revenues
Segment Reporting [Line Items]
Revenues from external customers									72,000,000	22,000,000	26,000,000
Total | Intersegment revenues | Clean Air
Segment Reporting [Line Items]
Revenues from external customers									0	0	0
Total | Intersegment revenues | Ride Performance
Segment Reporting [Line Items]
Revenues from external customers									22,000,000	22,000,000	26,000,000
Total | Intersegment revenues | Aftermarket
Segment Reporting [Line Items]
Revenues from external customers									0	0	0
Total | Intersegment revenues | Powertrain
Segment Reporting [Line Items]
Revenues from external customers									40,000,000	0	0
Total | Intersegment revenues | Motorparts
Segment Reporting [Line Items]
Revenues from external customers									10,000,000	0	0
Other
Segment Reporting [Line Items]
Net sales and operating revenues									0	0	0
EBITDA including noncontrolling interests									(234,000,000)	(245,000,000)	(229,000,000)
Other | Intersegment revenues
Segment Reporting [Line Items]
Revenues from external customers									0	0	0
Reclass & Elims
Segment Reporting [Line Items]
Net sales and operating revenues									(1,331,000,000)	(1,180,000,000)	(1,273,000,000)
Less: Depreciation and amortization									0	0	0
Earnings before interest expense, income taxes, and noncontrolling interests									(18,000,000)	(53,000,000)	(15,000,000)
Interest expense									0	0	0
Income tax expense (benefit)									0	0	0
Net income									(337,000,000)	(467,000,000)	(633,000,000)
Reclass & Elims | Intersegment revenues
Segment Reporting [Line Items]
Revenues from external customers									$ (72,000,000)	$ (22,000,000)	$ (26,000,000)

Segment and Geographic Area I_5

Segment and Geographic Area Information - Revenue Percent by Major Customers (Details) - Net Sales	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
General Motors
Revenue, Major Customer [Line Items]
Customer accounted for ten percent or more of net sales	12.00%	14.00%	17.00%
Ford
Revenue, Major Customer [Line Items]
Customer accounted for ten percent or more of net sales	12.00%	13.00%	13.00%

Segment and Geographic Area I_6

Segment and Geographic Area Information - Geographic Information Table (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule Of Geographical Information [Line Items]
Revenues from external customers	$ 11,763,000,000	$ 9,274,000,000	$ 8,597,000,000
Long-lived assets	4,268,000,000	1,765,000,000
United States
Schedule Of Geographical Information [Line Items]
Revenues from external customers	4,488,000,000	3,632,000,000	3,512,000,000
Long-lived assets	1,341,000,000	655,000,000
China
Schedule Of Geographical Information [Line Items]
Revenues from external customers	1,553,000,000	1,283,000,000	1,186,000,000
Long-lived assets	687,000,000	280,000,000
Germany
Schedule Of Geographical Information [Line Items]
Revenues from external customers	1,212,000,000	798,000,000	764,000,000
Long-lived assets	543,000,000	144,000,000
Poland
Schedule Of Geographical Information [Line Items]
Revenues from external customers	731,000,000	488,000,000	385,000,000
Long-lived assets	319,000,000	219,000,000
United Kingdom
Schedule Of Geographical Information [Line Items]
Revenues from external customers	499,000,000	482,000,000	387,000,000
Long-lived assets	116,000,000	48,000,000
Mexico
Schedule Of Geographical Information [Line Items]
Revenues from external customers	543,000,000	416,000,000	352,000,000
Long-lived assets	239,000,000	75,000,000
India
Schedule Of Geographical Information [Line Items]
Revenues from external customers	316,000,000	216,000,000	159,000,000
Long-lived assets	167,000,000	46,000,000
Turkey
Schedule Of Geographical Information [Line Items]
Revenues from external customers	7,000,000	9,000,000	9,000,000
Long-lived assets	276,000,000	0
Other Foreign
Schedule Of Geographical Information [Line Items]
Revenues from external customers	2,414,000,000	1,950,000,000	1,843,000,000
Long-lived assets	687,000,000	298,000,000
Reclass & Elims
Schedule Of Geographical Information [Line Items]
Revenues from external customers	0	0	$ 0
Long-lived assets	$ (107,000,000)	$ 0

Segment and Geographic Area I_7

Segment and Geographic Area Information - Revenue from External Customers (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting [Line Items]
Net sales and operating revenues	$ 4,278	$ 2,371	$ 2,533	$ 2,581	$ 2,389	$ 2,273	$ 2,314	$ 2,298	$ 11,763	$ 9,274	$ 8,597
OE Value-add
Segment Reporting [Line Items]
Net sales and operating revenues									2,500	2,187	2,028
OE Substrate
Segment Reporting [Line Items]
Revenue recognized									2,500	2,187	2,028
Net sales and operating revenues									7,268	5,836	5,329
Aftermarket
Segment Reporting [Line Items]
Net sales and operating revenues									1,995	1,251	1,240
Powertrain
Segment Reporting [Line Items]
Net sales and operating revenues									1,112	0	0
Powertrain | OE Value-add
Segment Reporting [Line Items]
Net sales and operating revenues									0	0	0
Powertrain | OE Substrate
Segment Reporting [Line Items]
Net sales and operating revenues									1,112	0	0
Powertrain | Aftermarket
Segment Reporting [Line Items]
Net sales and operating revenues									0	0	0
Clean Air
Segment Reporting [Line Items]
Net sales and operating revenues									6,707	6,216	5,764
Clean Air | OE Value-add
Segment Reporting [Line Items]
Net sales and operating revenues									2,500	2,187	2,028
Clean Air | OE Substrate
Segment Reporting [Line Items]
Net sales and operating revenues									4,207	4,029	3,736
Clean Air | Aftermarket
Segment Reporting [Line Items]
Net sales and operating revenues									0	0	0
Ride Performance
Segment Reporting [Line Items]
Net sales and operating revenues									1,949	1,807	1,593
Ride Performance | OE Value-add
Segment Reporting [Line Items]
Net sales and operating revenues									0	0	0
Ride Performance | OE Substrate
Segment Reporting [Line Items]
Net sales and operating revenues									1,949	1,807	1,593
Ride Performance | Aftermarket
Segment Reporting [Line Items]
Net sales and operating revenues									0	0	0
Aftermarket
Segment Reporting [Line Items]
Net sales and operating revenues									1,221	1,251	1,240
Aftermarket | OE Value-add
Segment Reporting [Line Items]
Net sales and operating revenues									0	0	0
Aftermarket | OE Substrate
Segment Reporting [Line Items]
Net sales and operating revenues									0	0	0
Aftermarket | Aftermarket
Segment Reporting [Line Items]
Net sales and operating revenues									1,221	1,251	1,240
Motorparts
Segment Reporting [Line Items]
Net sales and operating revenues									774	0	0
Motorparts | OE Value-add
Segment Reporting [Line Items]
Net sales and operating revenues									0	0	0
Motorparts | OE Substrate
Segment Reporting [Line Items]
Net sales and operating revenues									0	0	0
Motorparts | Aftermarket
Segment Reporting [Line Items]
Net sales and operating revenues									774	0	0
North America
Segment Reporting [Line Items]
Net sales and operating revenues									5,254	4,326	4,237
North America | Powertrain
Segment Reporting [Line Items]
Net sales and operating revenues									386	0	0
North America | Clean Air
Segment Reporting [Line Items]
Net sales and operating revenues									2,981	2,866	2,767
North America | Ride Performance
Segment Reporting [Line Items]
Net sales and operating revenues									721	674	652
North America | Aftermarket
Segment Reporting [Line Items]
Net sales and operating revenues									758	786	818
North America | Motorparts
Segment Reporting [Line Items]
Net sales and operating revenues									408	0	0
EMEA
Segment Reporting [Line Items]
Net sales and operating revenues									4,403	3,283	2,846
EMEA | Powertrain
Segment Reporting [Line Items]
Net sales and operating revenues									498	0	0
EMEA | Clean Air
Segment Reporting [Line Items]
Net sales and operating revenues									2,415	2,143	1,872
EMEA | Ride Performance
Segment Reporting [Line Items]
Net sales and operating revenues									801	736	604
EMEA | Aftermarket
Segment Reporting [Line Items]
Net sales and operating revenues									399	404	370
EMEA | Motorparts
Segment Reporting [Line Items]
Net sales and operating revenues									290	0	0
ROW
Segment Reporting [Line Items]
Net sales and operating revenues									2,106	1,665	1,514
ROW | Powertrain
Segment Reporting [Line Items]
Net sales and operating revenues									228	0	0
ROW | Clean Air
Segment Reporting [Line Items]
Net sales and operating revenues									1,311	1,207	1,125
ROW | Ride Performance
Segment Reporting [Line Items]
Net sales and operating revenues									427	397	337
ROW | Aftermarket
Segment Reporting [Line Items]
Net sales and operating revenues									64	61	52
ROW | Motorparts
Segment Reporting [Line Items]
Net sales and operating revenues									$ 76	$ 0	$ 0

Segment and Geographic Area I_8

Segment and Geographic Area Information - Capital Expenditures (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
PY Payable on Assets	$ 59	$ 68	$ 50
Asset Additions	541	410	363
Less CY Payable on Assets	(93)	(59)	(68)
Asset Expenditures	507	419	345
Total Reportable Segments | Clean Air
Segment Reporting Information [Line Items]
PY Payable on Assets	33	43	35
Asset Additions	202	212	217
Less CY Payable on Assets	(38)	(33)	(43)
Asset Expenditures	197	222	209
Total Reportable Segments | Ride Performance
Segment Reporting Information [Line Items]
PY Payable on Assets	22	19	11
Asset Additions	121	145	96
Less CY Payable on Assets	(23)	(22)	(19)
Asset Expenditures	120	142	88
Total Reportable Segments | Aftermarket
Segment Reporting Information [Line Items]
PY Payable on Assets	4	5	4
Asset Additions	38	27	26
Less CY Payable on Assets	(7)	(4)	(5)
Asset Expenditures	35	28	25
Total Reportable Segments | Powertrain
Segment Reporting Information [Line Items]
PY Payable on Assets	0	0	0
Asset Additions	81	0	0
Less CY Payable on Assets	(23)	0	0
Asset Expenditures	58	0	0
Total Reportable Segments | Motorparts
Segment Reporting Information [Line Items]
PY Payable on Assets	0	0	0
Asset Additions	43	0	0
Less CY Payable on Assets	(2)	0	0
Asset Expenditures	41	0	0
Other
Segment Reporting Information [Line Items]
PY Payable on Assets	0	1	0
Asset Additions	56	26	24
Less CY Payable on Assets		0	1
Asset Expenditures	$ 56	$ 27	$ 23

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Net Sales	$ 0	$ 0	$ 0
Icahn Automotive Group LLC
Related Party Transaction [Line Items]
Net Sales	52
Royalty income	1
Receivables	60
Payables and accruals	12
Anqing TP Goetze Piston Ring Company Limited
Related Party Transaction [Line Items]
Purchase from related party	16
Receivables	1
Payables and accruals	22
Anqing TP Powder Metallurgy Company Limited
Related Party Transaction [Line Items]
Net Sales	1
Purchase from related party	1
Receivables	1
Payables and accruals	1
Dongsuh Federal-Mogul Industrial Co., Ltd.
Related Party Transaction [Line Items]
Net Sales	1
Purchase from related party	2
Receivables	1
Payables and accruals	2
Federal-Mogul Powertrain Otomotiv A.S.
Related Party Transaction [Line Items]
Net Sales	11
Purchase from related party	53
Royalty income	4
Receivables	9
Payables and accruals	16
Federal-Mogul TP Liner Europe Otomotiv Ltd. Sti.
Related Party Transaction [Line Items]
Purchase from related party	13
Payables and accruals	1
Federal-Mogul TP Liners, Inc.
Related Party Transaction [Line Items]
Net Sales	2
Purchase from related party	14
Royalty income	4
Receivables	2
Payables and accruals	7
Montagewerk Abgastechnik Emden GmbH
Related Party Transaction [Line Items]
Net Sales	$ 1

Quarterly Financial Data (Una_3

Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net Sales	$ 4,278	$ 2,371	$ 2,533	$ 2,581	$ 2,389	$ 2,273	$ 2,314	$ 2,298	$ 11,763	$ 9,274	$ 8,597
Cost of Sales	3,698	2,014	2,157	2,202	2,019	1,912	1,949	1,932	10,071	7,812	7,126
Earnings before interest expense, income taxes, and noncontrolling interests	(31)	109	109	119	132	131	23	122	306	408	479
Net Income	$ (109)	$ 57	$ 47	$ 60	$ 62	$ 80	$ (5)	$ 61	$ 55	$ 198	$ 347
Basic earnings (loss) per share of common stock (in dollars per share)	$ (1.35)	$ 1.11	$ 0.92	$ 1.17	$ 1.19	$ 1.53	$ (0.09)	$ 1.13	$ 0.93	$ 3.75	$ 6.20
Diluted earnings (loss) per share of common stock (in dollars per share)	$ (1.35)	$ 1.11	$ 0.92	$ 1.17	$ 1.19	$ 1.53	$ (0.09)	$ 1.12	$ 0.93	$ 3.73	$ 6.15
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net Sales		$ 2,372	$ 2,537	$ 2,574	$ 2,391	$ 2,274	$ 2,317	$ 2,292		$ 9,274	$ 8,599
Cost of Sales		2,014	2,159	2,198	2,020	1,911	1,949	1,929		7,809	7,116
Earnings before interest expense, income taxes, and noncontrolling interests		104	113	117	135	134	27	121		417	516
Net Income		$ 54	$ 50	$ 58	$ 68	$ 83	$ (3)	$ 59		$ 207	$ 356
Basic earnings (loss) per share of common stock (in dollars per share)		$ 1.05	$ 0.98	$ 1.13	$ 1.33	$ 1.57	$ (0.05)	$ 1.10		$ 3.93	$ 6.36
Diluted earnings (loss) per share of common stock (in dollars per share)		$ 1.05	$ 0.98	$ 1.13	$ 1.33	$ 1.57	$ (0.05)	$ 1.09		$ 3.91	$ 6.31
Revisions
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net Sales		$ (1)	$ (4)	$ 7	$ (2)	$ (1)	$ (3)	$ 6		$ 0	$ (2)
Cost of Sales		0	(2)	4	(1)	1	0	3		3	10
Earnings before interest expense, income taxes, and noncontrolling interests		5	(4)	2	(3)	(3)	(3)	1		(8)	(13)
Net Income		$ 3	$ (3)	$ 2	$ (6)	$ (3)	$ (2)	$ 2		$ (9)	$ (9)
Basic earnings (loss) per share of common stock (in dollars per share)		$ 0.06	$ (0.06)	$ 0.04	$ (0.14)	$ (0.04)	$ (0.04)	$ 0.03		$ (0.18)	$ (0.16)
Diluted earnings (loss) per share of common stock (in dollars per share)		$ 0.06	$ (0.06)	$ 0.04	$ (0.14)	$ (0.04)	$ (0.04)	$ 0.03		$ (0.18)	$ (0.16)
Reclasses
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Earnings before interest expense, income taxes, and noncontrolling interests										$ (1)	$ (24)
Reclasses | As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Earnings before interest expense, income taxes, and noncontrolling interests		$ 0	$ 0	$ 0	$ 0	$ 0	$ (1)	$ 0		(1)
As Reclassified
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net Sales										9,274	8,599
Cost of Sales										7,809	7,116
Earnings before interest expense, income taxes, and noncontrolling interests										416	492
Net Income										$ 207	$ 356
Basic earnings (loss) per share of common stock (in dollars per share)										$ 3.93	$ 6.36
Diluted earnings (loss) per share of common stock (in dollars per share)										$ 3.91	$ 6.31
As Reclassified | As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Earnings before interest expense, income taxes, and noncontrolling interests		$ 104	$ 113	$ 117	$ 135	$ 134	$ 26	$ 121		$ 416

Supplemental Guarantor Conden_3

Supplemental Guarantor Condensed Consolidating Financial Statements - Additional Information (Details)	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Ownership percentage of existing and future material domestic owned subsidiaries	100.00%

Supplemental Guarantor Conden_4

Supplemental Guarantor Condensed Consolidating Financial Statements - Statement of Comprehensive Income Loss (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net sales and operating revenues —
External									$ 11,763	$ 9,274	$ 8,597
Affiliated companies									0	0	0
Net sales and operating revenues	$ 4,278	$ 2,371	$ 2,533	$ 2,581	$ 2,389	$ 2,273	$ 2,314	$ 2,298	11,763	9,274	8,597
Costs and expenses
Cost of sales	3,698	2,014	2,157	2,202	2,019	1,912	1,949	1,932	10,071	7,812	7,126
Selling, general, and administrative									794	638	514
Depreciation and amortization									345	226	213
Engineering, research, and development									204	158	153
Goodwill impairment charge									3	11	0
Costs and expenses									11,417	8,845	8,006
Other expense (income)
Loss on sale of receivables									16	5	5
Non-service postretirement benefit costs									20	16	84
Loss on extinguishment of debt									10	1	24
Equity in (earnings) losses of nonconsolidated affiliates, net of tax									(18)	1	0
Other expense (income), net									12	(2)	(1)
Total other expense (income)									40	21	112
Earnings before interest expense, income taxes, and noncontrolling interests	(31)	109	109	119	132	131	23	122	306	408	479
Interest expense —
External (net of interest capitalized)									132	72	68
Affiliated companies (net of interest income)									0	0	0
Earnings (loss) before income taxes, noncontrolling interests and equity in net income from affiliated companies									174	336	411
Income tax expense (benefit)									63	71	(4)
Equity in net income from affiliated companies									0	0	0
Net income (loss)									111	265	415
Net income attributable to Tenneco Inc.									56	67	68
Net income (loss) attributable to Tenneco Inc.	$ (109)	$ 57	$ 47	$ 60	$ 62	$ 80	$ (5)	$ 61	55	198	347
Comprehensive Income									(99)	319	346
Reclass & Elims
Net sales and operating revenues —
External									0	0	0
Affiliated companies									(1,331)	(1,180)	(1,273)
Net sales and operating revenues									(1,331)	(1,180)	(1,273)
Costs and expenses
Cost of sales									(1,331)	(1,180)	(1,273)
Selling, general, and administrative									0	0	0
Depreciation and amortization									0	0	0
Engineering, research, and development									0	0	0
Goodwill impairment charge									0	0
Costs and expenses									(1,331)	(1,180)	(1,273)
Other expense (income)
Loss on sale of receivables									0	0	0
Non-service postretirement benefit costs									0	0	0
Loss on extinguishment of debt									0	0	0
Equity in (earnings) losses of nonconsolidated affiliates, net of tax									0	0
Other expense (income), net									18	53	15
Total other expense (income)									18	53	15
Earnings before interest expense, income taxes, and noncontrolling interests									(18)	(53)	(15)
Interest expense —
External (net of interest capitalized)									0	0	0
Affiliated companies (net of interest income)									0	0	0
Earnings (loss) before income taxes, noncontrolling interests and equity in net income from affiliated companies									(18)	(53)	(15)
Income tax expense (benefit)									0	0	0
Equity in net income from affiliated companies									(319)	(414)	(618)
Net income (loss)									(337)	(467)	(633)
Net income attributable to Tenneco Inc.									0	0	0
Net income (loss) attributable to Tenneco Inc.									(337)	(467)	(633)
Comprehensive Income									(251)	(467)	(633)
Guarantor Subsidiaries
Net sales and operating revenues —
External									4,678	3,889	3,863
Affiliated companies									606	540	526
Net sales and operating revenues									5,284	4,429	4,389
Costs and expenses
Cost of sales									4,570	3,771	3,724
Selling, general, and administrative									384	352	235
Depreciation and amortization									153	90	87
Engineering, research, and development									95	77	76
Goodwill impairment charge									3	0
Costs and expenses									5,205	4,290	4,122
Other expense (income)
Loss on sale of receivables									8	2	2
Non-service postretirement benefit costs									13	18	83
Loss on extinguishment of debt									0	1	24
Equity in (earnings) losses of nonconsolidated affiliates, net of tax									0	0
Other expense (income), net									29	(2)	8
Total other expense (income)									50	19	117
Earnings before interest expense, income taxes, and noncontrolling interests									29	120	150
Interest expense —
External (net of interest capitalized)									26	18	(26)
Affiliated companies (net of interest income)									(14)	(15)	(12)
Earnings (loss) before income taxes, noncontrolling interests and equity in net income from affiliated companies									17	117	188
Income tax expense (benefit)									(30)	(10)	(101)
Equity in net income from affiliated companies									135	149	166
Net income (loss)									182	276	455
Net income attributable to Tenneco Inc.									0	0	0
Net income (loss) attributable to Tenneco Inc.									182	276	455
Comprehensive Income									159	282	464
Non-Guarantor Subsidiaries
Net sales and operating revenues —
External									7,085	5,385	4,734
Affiliated companies									725	640	747
Net sales and operating revenues									7,810	6,025	5,481
Costs and expenses
Cost of sales									6,845	5,221	4,675
Selling, general, and administrative									377	286	278
Depreciation and amortization									192	136	126
Engineering, research, and development									109	81	77
Goodwill impairment charge									0	11
Costs and expenses									7,523	5,735	5,156
Other expense (income)
Loss on sale of receivables									8	3	3
Non-service postretirement benefit costs									9	(2)	1
Loss on extinguishment of debt									0	0	0
Equity in (earnings) losses of nonconsolidated affiliates, net of tax									(18)	1
Other expense (income), net									(36)	(53)	(24)
Total other expense (income)									(37)	(51)	(20)
Earnings before interest expense, income taxes, and noncontrolling interests									324	341	345
Interest expense —
External (net of interest capitalized)									12	5	4
Affiliated companies (net of interest income)									7	6	7
Earnings (loss) before income taxes, noncontrolling interests and equity in net income from affiliated companies									305	330	334
Income tax expense (benefit)									93	81	97
Equity in net income from affiliated companies									0	0	0
Net income (loss)									212	249	237
Net income attributable to Tenneco Inc.									56	67	68
Net income (loss) attributable to Tenneco Inc.									156	182	169
Comprehensive Income									24	173	159
Tenneco Inc. (Parent Company)
Net sales and operating revenues —
External									0	0	0
Affiliated companies									0	0	0
Net sales and operating revenues									0	0	0
Costs and expenses
Cost of sales									(13)	0	0
Selling, general, and administrative									33	0	1
Depreciation and amortization									0	0	0
Engineering, research, and development									0	0	0
Goodwill impairment charge									0	0
Costs and expenses									20	0	1
Other expense (income)
Loss on sale of receivables									0	0	0
Non-service postretirement benefit costs									(2)	0	0
Loss on extinguishment of debt									10	0	0
Equity in (earnings) losses of nonconsolidated affiliates, net of tax									0	0
Other expense (income), net									1	0	0
Total other expense (income)									9	0	0
Earnings before interest expense, income taxes, and noncontrolling interests									(29)	0	(1)
Interest expense —
External (net of interest capitalized)									94	49	90
Affiliated companies (net of interest income)									7	9	5
Earnings (loss) before income taxes, noncontrolling interests and equity in net income from affiliated companies									(130)	(58)	(96)
Income tax expense (benefit)									0	0	0
Equity in net income from affiliated companies									184	265	452
Net income (loss)									54	207	356
Net income attributable to Tenneco Inc.									0	0	0
Net income (loss) attributable to Tenneco Inc.									54	207	356
Comprehensive Income									$ (31)	$ 331	$ 356

Supplemental Guarantor Conden_5

Supplemental Guarantor Condensed Consolidating Financial Statements - Balance Sheet (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Income (Loss) from Equity Method Investments	$ 18	$ (1)	$ 0
Current assets:
Cash and cash equivalents	697	315
Restricted cash	5	3
Receivables, net	2,572	1,321
Inventories	2,245	820
Prepayments and other current assets	590	288
Total current assets	6,109	2,747
Property, plant and equipment, net	3,501	1,691
Investment in affiliated companies	0	0
Long-term receivables, net	10	9
Goodwill	869	49
Intangibles—net	1,519	22
Investments in nonconsolidated affiliates	544	2
Deferred income taxes	467	213
Other assets	213	63
Total assets	13,232	4,796
Short-term debt (including current maturities of long-term debt)
Short-term debt (including current maturities of long-term debt)	153	103
Accounts payable	2,759	1,582
Accrued compensation and employee benefits	343	141
Accrued income taxes	64	27
Other	1,001	424
Total current liabilities	4,320	2,277
Long-term debt	5,340	1,358
Intercompany due to (due from)	0	0
Deferred income taxes	88	11
Pension, postretirement benefits and other liabilities	1,430	426
Commitments and contingencies
Total liabilities	11,178	4,072
Redeemable noncontrolling interests	138	42	$ 40	$ 41
Total Tenneco Inc. shareholders’ equity	1,726	636
Noncontrolling interests	190	46
Total equity	1,916	682
Total liabilities, redeemable noncontrolling interests and equity	13,232	4,796
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Income (Loss) from Equity Method Investments	0	0
Current assets:
Cash and cash equivalents	329	7
Restricted cash		0
Receivables, net	943	208
Inventories	958	359
Prepayments and other current assets	254	99
Total current assets	2,484	673
Property, plant and equipment, net	1,131	594
Investment in affiliated companies	1,421	1,385
Long-term receivables, net	9	8
Goodwill	263	22
Intangibles—net	1,007	5
Investments in nonconsolidated affiliates	43	1
Deferred income taxes	255	169
Other assets	48	12
Total assets	6,661	2,869
Short-term debt (including current maturities of long-term debt)
Short-term debt (including current maturities of long-term debt)	1	0
Accounts payable	858	496
Accrued compensation and employee benefits	88	24
Accrued income taxes	0	2
Other	436	208
Total current liabilities	1,383	730
Long-term debt	3	632
Intercompany due to (due from)	2,726	561
Deferred income taxes	0	0
Pension, postretirement benefits and other liabilities	225	299
Commitments and contingencies
Total liabilities	4,337	2,222
Redeemable noncontrolling interests	0	0
Total Tenneco Inc. shareholders’ equity	2,324	647
Noncontrolling interests	0	0
Total equity	2,324	647
Total liabilities, redeemable noncontrolling interests and equity	6,661	2,869
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Income (Loss) from Equity Method Investments	18	(1)
Current assets:
Cash and cash equivalents	364	308
Restricted cash	5	3
Receivables, net	1,629	1,113
Inventories	1,287	461
Prepayments and other current assets	311	189
Total current assets	3,596	2,074
Property, plant and equipment, net	2,361	1,097
Investment in affiliated companies	0	0
Long-term receivables, net	1	1
Goodwill	383	27
Intangibles—net	510	17
Investments in nonconsolidated affiliates	501	1
Deferred income taxes	200	44
Other assets	180	51
Total assets	7,732	3,312
Short-term debt (including current maturities of long-term debt)
Short-term debt (including current maturities of long-term debt)	152	103
Accounts payable	1,894	1,086
Accrued compensation and employee benefits	255	117
Accrued income taxes	52	25
Other	488	204
Total current liabilities	2,841	1,535
Long-term debt	32	12
Intercompany due to (due from)	(215)	(397)
Deferred income taxes	88	11
Pension, postretirement benefits and other liabilities	705	127
Commitments and contingencies
Total liabilities	3,451	1,288
Redeemable noncontrolling interests	138	42
Total Tenneco Inc. shareholders’ equity	3,953	1,936
Noncontrolling interests	190	46
Total equity	4,143	1,982
Total liabilities, redeemable noncontrolling interests and equity	7,732	3,312
Tenneco Inc. (Parent Company)
Condensed Financial Statements, Captions [Line Items]
Income (Loss) from Equity Method Investments	0	0
Current assets:
Cash and cash equivalents	4	0
Restricted cash	0	0
Receivables, net	0	0
Inventories	0	0
Prepayments and other current assets	25	0
Total current assets	29	0
Property, plant and equipment, net	9	0
Investment in affiliated companies	4,856	1,198
Long-term receivables, net	0	0
Goodwill	223	0
Intangibles—net	2	0
Investments in nonconsolidated affiliates	0	0
Deferred income taxes	12	0
Other assets	0	0
Total assets	5,131	1,198
Short-term debt (including current maturities of long-term debt)
Short-term debt (including current maturities of long-term debt)	0	0
Accounts payable	7	0
Accrued compensation and employee benefits	0	0
Accrued income taxes	27	0
Other	77	12
Total current liabilities	111	12
Long-term debt	5,305	714
Intercompany due to (due from)	(2,511)	(164)
Deferred income taxes	0	0
Pension, postretirement benefits and other liabilities	500	0
Commitments and contingencies
Total liabilities	3,405	562
Redeemable noncontrolling interests	0	0
Total Tenneco Inc. shareholders’ equity	1,726	636
Noncontrolling interests	0	0
Total equity	1,726	636
Total liabilities, redeemable noncontrolling interests and equity	5,131	1,198
Reclass & Elims
Condensed Financial Statements, Captions [Line Items]
Income (Loss) from Equity Method Investments	0	0
Current assets:
Cash and cash equivalents	0	0
Restricted cash	0	0
Receivables, net	0	0
Inventories	0	0
Prepayments and other current assets	0	0
Total current assets	0	0
Property, plant and equipment, net	0	0
Investment in affiliated companies	(6,277)	(2,583)
Long-term receivables, net	0	0
Goodwill	0	0
Intangibles—net	0	0
Investments in nonconsolidated affiliates	0	0
Deferred income taxes	0	0
Other assets	(15)	0
Total assets	(6,292)	(2,583)
Short-term debt (including current maturities of long-term debt)
Short-term debt (including current maturities of long-term debt)	0	0
Accounts payable	0	0
Accrued compensation and employee benefits	0	0
Accrued income taxes	(15)	0
Other	0	0
Total current liabilities	(15)	0
Long-term debt	0	0
Intercompany due to (due from)	0	0
Deferred income taxes	0	0
Pension, postretirement benefits and other liabilities	0	0
Commitments and contingencies
Total liabilities	(15)	0
Redeemable noncontrolling interests	0	0
Total Tenneco Inc. shareholders’ equity	(6,277)	(2,583)
Noncontrolling interests	0	0
Total equity	(6,277)	(2,583)
Total liabilities, redeemable noncontrolling interests and equity	$ (6,292)	$ (2,583)

Supplemental Guarantor Conden_6

Supplemental Guarantor Condensed Consolidating Financial Statements - Statement of Cash Flows (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Operating Activities
Net cash provided (used) by operating activities		$ 439		$ 517		$ 374
Investing Activities
Federal-Mogul acquisition, net of cash acquired		(2,194)		0		0
Proceeds from sale of assets		9		8		6
Proceeds from sale of equity interest		0		9		0
Cash payments for plant, property, and equipment		(507)		(419)		(345)
Proceeds from deferred purchase price of factored receivables		174		112		110
Other		4		(10)		0
Net cash used by investing activities		(2,514)		(300)		(229)
Financing Activities
Cash dividends		(59)		(53)		0
Payments of term loans and notes		(453)		(36)		(545)
Proceeds from term loans and notes		3,426		160		529
Debt issuance cost of long-term debt		(95)		(8)		(9)
Tax impact from stock-based compensation		0
Purchase of common stock under the share repurchase program		0		(169)		(225)
Issuance (repurchase) of common shares		(1)		(1)		13
Net increase (decrease) in bank overdrafts		(5)		(7)		10
Borrowings on revolving lines of credit		5,149		6,664		5,417
Payments on revolving lines of credit		(5,405)		(6,737)		(5,221)
Net increase (decrease) in short-term borrowings secured by accounts receivable		(30)
Intercompany dividends and net (decrease) increase in intercompany obligations		0		0		0
Distributions to noncontrolling interest partners		(51)		(64)		(55)
Net cash provided (used) by financing activities		2,476		(251)		(86)
Effect of foreign exchange rate changes on cash and cash equivalents		(17)		3		2
Increase (decrease) in cash, cash equivalents and restricted cash		384		(31)		61
Cash, cash equivalents and restricted cash, January 1		318	[1]	349	[1]	288
Cash, cash equivalents and restricted cash, December 31	[1]	702		318		349
Guarantor Subsidiaries
Operating Activities
Net cash provided (used) by operating activities		248		284		176
Investing Activities
Federal-Mogul acquisition, net of cash acquired		151
Proceeds from sale of assets		2		3		0
Proceeds from sale of equity interest				0
Cash payments for plant, property, and equipment		(196)		(164)		(130)
Proceeds from deferred purchase price of factored receivables		0		0		0
Other		1		(4)
Net cash used by investing activities		(42)		(165)		(130)
Financing Activities
Cash dividends		0		0
Payments of term loans and notes		(391)		(10)		0
Proceeds from term loans and notes		0		136		0
Debt issuance cost of long-term debt		(15)		(8)		0
Tax impact from stock-based compensation		0
Purchase of common stock under the share repurchase program				0		0
Issuance (repurchase) of common shares		0		0		0
Net increase (decrease) in bank overdrafts		0		0		0
Borrowings on revolving lines of credit		4,411		3,956		0
Payments on revolving lines of credit		(4,654)		(3,710)		0
Net increase (decrease) in short-term borrowings secured by accounts receivable		0
Intercompany dividends and net (decrease) increase in intercompany obligations		765		(485)		(39)
Distributions to noncontrolling interest partners		0		0		0
Net cash provided (used) by financing activities		116		(121)		(39)
Effect of foreign exchange rate changes on cash and cash equivalents		0		0		0
Increase (decrease) in cash, cash equivalents and restricted cash		322		(2)		7
Cash, cash equivalents and restricted cash, January 1		7	[1]	9	[1]	2
Cash, cash equivalents and restricted cash, December 31	[1]	329		7		9
Non-Guarantor Subsidiaries
Operating Activities
Net cash provided (used) by operating activities		246		290		190
Investing Activities
Federal-Mogul acquisition, net of cash acquired		124
Proceeds from sale of assets		7		5		6
Proceeds from sale of equity interest				9
Cash payments for plant, property, and equipment		(311)		(255)		(215)
Proceeds from deferred purchase price of factored receivables		174		112		110
Other		3		(6)
Net cash used by investing activities		(3)		(135)		(99)
Financing Activities
Cash dividends		0		0
Payments of term loans and notes		(62)		(20)		(29)
Proceeds from term loans and notes		26		24		29
Debt issuance cost of long-term debt		0		0		0
Tax impact from stock-based compensation		0
Purchase of common stock under the share repurchase program				0		0
Issuance (repurchase) of common shares		0		0		0
Net increase (decrease) in bank overdrafts		(5)		(7)		10
Borrowings on revolving lines of credit		114		48		101
Payments on revolving lines of credit		(127)		(49)		(103)
Net increase (decrease) in short-term borrowings secured by accounts receivable		(30)
Intercompany dividends and net (decrease) increase in intercompany obligations		(33)		(119)		8
Distributions to noncontrolling interest partners		(51)		(64)		(55)
Net cash provided (used) by financing activities		(168)		(187)		(39)
Effect of foreign exchange rate changes on cash and cash equivalents		(17)		3		2
Increase (decrease) in cash, cash equivalents and restricted cash		58		(29)		54
Cash, cash equivalents and restricted cash, January 1		311	[1]	340	[1]	286
Cash, cash equivalents and restricted cash, December 31	[1]	369		311		340
Tenneco Inc. (Parent Company)
Operating Activities
Net cash provided (used) by operating activities		(36)		(4)		23
Investing Activities
Federal-Mogul acquisition, net of cash acquired		(2,469)
Proceeds from sale of assets		0		0		0
Proceeds from sale of equity interest
Cash payments for plant, property, and equipment		0		0		0
Proceeds from deferred purchase price of factored receivables		0		0
Other		0		0
Net cash used by investing activities		(2,469)		0		0
Financing Activities
Cash dividends		(59)		(53)
Payments of term loans and notes		0		(6)		(516)
Proceeds from term loans and notes		3,400		0		500
Debt issuance cost of long-term debt		(80)		0		(9)
Tax impact from stock-based compensation		0
Purchase of common stock under the share repurchase program				(169)		(225)
Issuance (repurchase) of common shares		(1)		(1)		13
Net increase (decrease) in bank overdrafts		0		0		0
Borrowings on revolving lines of credit		624		2,660		5,316
Payments on revolving lines of credit		(624)		(2,978)		(5,118)
Net increase (decrease) in short-term borrowings secured by accounts receivable		0
Intercompany dividends and net (decrease) increase in intercompany obligations		(751)		551		16
Distributions to noncontrolling interest partners		0		0		0
Net cash provided (used) by financing activities		2,509		4		(23)
Effect of foreign exchange rate changes on cash and cash equivalents		0		0		0
Increase (decrease) in cash, cash equivalents and restricted cash		4		0		0
Cash, cash equivalents and restricted cash, January 1		0	[1]	0	[1]	0
Cash, cash equivalents and restricted cash, December 31	[1]	4		0		0
Reclass & Elims
Operating Activities
Net cash provided (used) by operating activities		(19)		(53)		(15)
Investing Activities
Federal-Mogul acquisition, net of cash acquired		0
Proceeds from sale of assets		0		0		0
Proceeds from sale of equity interest
Cash payments for plant, property, and equipment		0		0		0
Proceeds from deferred purchase price of factored receivables		0		0
Other		0		0
Net cash used by investing activities		0		0		0
Financing Activities
Cash dividends		0		0
Payments of term loans and notes		0		0		0
Proceeds from term loans and notes		0		0		0
Debt issuance cost of long-term debt		0		0		0
Tax impact from stock-based compensation		0
Purchase of common stock under the share repurchase program				0		0
Issuance (repurchase) of common shares		0		0		0
Net increase (decrease) in bank overdrafts		0		0		0
Borrowings on revolving lines of credit		0		0		0
Payments on revolving lines of credit		0				0
Net increase (decrease) in short-term borrowings secured by accounts receivable		0
Intercompany dividends and net (decrease) increase in intercompany obligations		19		53		15
Distributions to noncontrolling interest partners		0		0		0
Net cash provided (used) by financing activities		19		53		15
Effect of foreign exchange rate changes on cash and cash equivalents		0		0		0
Increase (decrease) in cash, cash equivalents and restricted cash		0		0		0
Cash, cash equivalents and restricted cash, January 1		0	[1]	0	[1]	0
Cash, cash equivalents and restricted cash, December 31	[1]	$ 0		$ 0		$ 0
[1]	Cash and cash equivalents include highly liquid investments with a maturity of three months or less at the date of purchase.

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent event - USD ($) $ / shares in Units, $ in Millions	Feb. 06, 2019	Jan. 10, 2019
Subsequent Event [Line Items]
Cash dividends declared (in dollars per share)	$ 0.25
Öhlins Racing A.B.
Subsequent Event [Line Items]
Purchase price		$ 160

SCHEDULE II _ VALUATION AND Q_2

SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions	12 Months Ended			24 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018
Allowance for Doubtful Accounts And Notes Receivable
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 16	$ 16	$ 16	$ 16
Charged to Costs and Expenses	5	1	1
Charged to Other Accounts	0	0	0
Deductions	4	1	1
Balance at End of Year	17	16	16	17
Deferred Tax Assets
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	163	145	127	145
Charged to Costs and Expenses	0	(1)	18
Charged to Other Accounts	0	0	0
Deductions	351	19	0
Balance at End of Year	$ 514	$ 163	$ 145	514
Federal-Mogul | Deferred Tax Assets
Movement in Valuation Allowances and Reserves [Roll Forward]
Deductions				$ 368