Earnings Per Share

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

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

Options to purchase 834, 134,361, and 175,216 shares of common stock were outstanding as of December 31, 2017, 2016 and 2015, respectively, but not included in the computation of diluted earnings per share, because the options were anti-dilutive.