Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2017

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,
	2017		2016		2015
	(Millions Except Share and Per Share Amounts)
Basic earnings per share—
Net income attributable to Tenneco Inc.	$	207	$	356	$	241
Average shares of common stock outstanding		52,796,184		55,939,135		59,678,309
Earnings per average share of common stock	$	3.93	$	6.36	$	4.05
Diluted earnings per share—
Net income attributable to Tenneco Inc.	$	207	$	356	$	241
Average shares of common stock outstanding		52,796,184		55,939,135		59,678,309
Effect of dilutive securities:
Restricted stock		111,062		175,513		96,168
Stock options		119,665		292,788		418,673
Average shares of common stock outstanding including dilutive securities		53,026,911		56,407,436		60,193,150
Earnings per average share of common stock	$	3.91	$	6.31	$	4.01