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Earnings Per Share
 6 Months Ended
Jun. 30, 2018
Earnings Per Share [Abstract]  
Earnings Per Share
Earnings Per Share
Earnings per share of common stock outstanding were computed as follows:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2018
 
2017
 
2018
 
2017
 
(Millions Except Share and Per Share Amounts)
Basic earnings (loss) per share —
 
 
 
 
 
 
 
Net income (loss) attributable to Tenneco Inc.
$
50

 
$
(3
)
 
$
108

 
$
56

Weighted Average shares of common stock outstanding
51,258,668

 
53,505,341

 
51,232,639

 
53,662,375

Earnings (loss) per share of common stock
$
0.98

 
$
(0.05
)
 
$
2.12

 
$
1.05

Diluted earnings (loss) per share —
 
 
 
 

 

Net income (loss) attributable to Tenneco Inc.
$
50

 
$
(3
)
 
$
108

 
$
56

Weighted Average shares of common stock outstanding
51,258,668

 
53,505,341

 
51,232,639

 
53,662,375

Effect of dilutive securities:
 
 
 
 

 

Restricted stock
298,826

 
—

 
251,971

 
111,459

Stock options
49,730

 
—

 
61,405

 
179,084

Weighted Average shares of common stock outstanding including dilutive securities
51,607,224

 
53,505,341

 
51,546,015

 
53,952,918

Earnings (loss) per share of common stock
$
0.98

 
$
(0.05
)
 
$
2.10

 
$
1.05



Options to purchase 123,947 and 834 shares of common stock were outstanding as of June 30, 2018 and 2017, respectively, but not included in the computation of diluted earnings per share because the options were anti-dilutive.