CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net income attributable to Tenneco Inc.	$ 54	$ 83	$ 162	$ 139
Less: Net income attributable to noncontrolling interests	9	16	39	48
Net Income	63	99	201	187
Translation of foreign currency statements attributable to Tenneco	(28)	28	(102)	81
Translation of foreign currency statements attributable to Noncontrolling Interest	(3)	1	(2)	4
Translation of foreign currency statements	(31)	29	(104)	85
Additional Liability for Pension and Postretirement Benefits, net of tax attributable to Tenneco	4	3	11	14
Additional liability for pension and postretirement benefits, net of tax	4	3	11	14
Accumulated Other Comprehensive Income (Loss)
Beginning balance			742
Ending balance	775	686	775	686
Other Comprehensive Income (Loss)	(27)	32	(93)	99
Comprehensive Income attributable to Tenneco	30	114	71	234
Comprehensive Income attributable to Noncontrolling Interest	6	17	37	52
Comprehensive Income	36	131	108	286
Tenneco Inc.
Accumulated Other Comprehensive Income (Loss)
Ending balance	737	647	737	647
Other Comprehensive Income (Loss)	(24)	31	(91)
AOCI Tenneco, Inc
Accumulated Other Comprehensive Income (Loss)
Beginning balance			(541)	(665)
Ending balance	(632)	(570)	(632)	(570)
Other Comprehensive Income (Loss)			(91)	95
Tenneco, Inc. Cumulative Translation Adjustment
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(315)	(285)	(241)	(338)
Reclassification	(28)	28	(102)	81
Ending balance	(343)	(257)	(343)	(257)
Tenneco, Inc. Additional Liability for Pension and Postretirement Benefits
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(293)	(316)	(300)	(327)
Reclassification	4	3	11	14
Ending balance	(289)	(313)	(289)	(313)
Noncontrolling Interests
Accumulated Other Comprehensive Income (Loss)
Beginning balance			46	47
Ending balance	38	39	38	39
Other Comprehensive Income (Loss)	(3)	1	(2)	4
AOCI Noncontrolling Interests
Accumulated Other Comprehensive Income (Loss)
Ending balance	(5)	(1)	(5)	(1)
Noncontrolling Interests Cumulative Translation Adjustment
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(2)	(2)	(3)	(5)
Reclassification	(3)	1	(2)	4
Ending balance	(5)	(1)	(5)	(1)
Total
Accumulated Other Comprehensive Income (Loss)
Ending balance	(637)	(571)	(637)	(571)
Total Cumulative Translation Adjustment
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(317)	(287)	(244)	(343)
Reclassification	(31)	29	(104)	85
Ending balance	(348)	(258)	(348)	(258)
Total Additional Liability for Pension and Postretirement Benefits
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(293)	(316)	(300)	(327)
Reclassification	4	3	11	14
Ending balance	$ (289)	$ (313)	$ (289)	$ (313)