Earnings (Loss) per Share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Summary of Earnings (Loss) per Share of Common Stock

Earnings (loss) per share of common stock outstanding were computed as follows:

	Year Ended December 31
	2020		2019		2018
Net income (loss) attributable to Tenneco Inc.	$	(1,521)	$	(334)	$	55
Basic earnings (loss) per share —
Average shares of common stock outstanding	81,378,474		80,904,060		58,625,087
Earnings (loss) per average share of common stock	$	(18.69)	$	(4.12)	$	0.93
Diluted earnings (loss) per share —
Average shares of common stock outstanding	81,378,474		80,904,060		58,625,087
Effect of dilutive securities:
Restricted stock, RSUs and PSUs	—		—		93,546
Stock options	—		—		40,099
Average shares of common stock outstanding including dilutive securities	81,378,474		80,904,060		58,758,732
Earnings (loss) per average share of common stock	$	(18.69)	$	(4.12)	$	0.93