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Net Income (Loss) Per Share Attributable to Noble Energy Common Shareholders
 9 Months Ended
Sep. 30, 2019
Earnings Per Share [Abstract]  
Net Income (Loss) Per Share Attributable to Noble Energy Common Shareholders
Note 14. Net Income (Loss) Per Share Attributable to Noble Energy Common Shareholders
Noble Energy's basic income (loss) per share of common stock is computed by dividing net income (loss) attributable to Noble Energy by the weighted average number of shares of Noble Energy common stock outstanding during each period. The following table summarizes the calculation of basic and diluted income (loss) per share:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
(millions, except per share amounts)
2019
 
2018
 
2019
 
2018
Net Income (Loss) and Comprehensive Income (Loss) Attributable to Noble Energy
$
17

 
$
227

 
$
(306
)
 
$
758

Weighted Average Number of Shares Outstanding, Basic (1)
478

 
482

 
478

 
484

Incremental Shares from Assumed Conversion of Dilutive Stock Options, Restricted Stock, and Shares of Common Stock in Rabbi Trust
2

 
2

 
—

 
2

Weighted Average Number of Shares Outstanding, Diluted
480

 
484

 
478

 
486

Income (Loss) Per Share, Basic
$
0.04

 
$
0.47

 
$
(0.64
)
 
$
1.57

Income (Loss) Per Share, Diluted
$
0.04

 
$
0.47

 
$
(0.64
)
 
$
1.56

Number of Antidilutive Stock Options, Shares of Restricted Stock, and Shares of Common Stock in Rabbi Trust Excluded from Calculation Above
14

 
13

 
15

 
14

(1) 
Decrease in weighted average number of shares outstanding reflects the impact of Noble Energy common stock repurchased in 2018 pursuant to our $750 million share repurchase program.