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Additional Shareholders' Equity Information (Tables)
 12 Months Ended
Dec. 31, 2017
Additional Shareholders' Equity Information [Abstract]  
Schedule Of Activity In Shares Of Common And Treasury Stock
Activity in shares of our common stock and treasury stock was as follows:
 
 
Year Ended December 31,
 
 
2017
 
2016
Common Stock Shares Issued
 
 

 
 

Shares, Beginning of Period
 
471,360,427

 
469,718,512

Exercise of Common Stock Options
 
382,882

 
954,898

Restricted Stock Awarded, Net of Forfeitures (1)
 
2,912,936

 
687,017

Shares Exchanged in Clayton Williams Energy Acquisition
 
54,087,136

 
—

Shares, End of Period
 
528,743,381

 
471,360,427

Treasury Stock
 


 


Shares, Beginning of Period
 
37,961,316

 
37,925,625

Shares Received in Payment of Withholding Taxes Due on Vesting of Shares of Restricted Stock (2)
 
1,026,891

 
236,700

Rabbi Trust Shares Distributed and/or Sold
 
(201,238
)
 
(201,009
)
Shares, End of Period
 
38,786,969

 
37,961,316

Additional Information
 
 
 
 
Incremental Shares From Assumed Conversion of Dilutive Stock Options, Restricted Stock, and Shares of Common Stock in Rabbi Trust (2)
 
—

 
—

Number of Antidilutive Stock Options, Shares of Restricted Stock and Shares of Common Stock in Rabbi Trust excluded from Dilutive Loss per Share
 
15,619,276

 
14,218,319


(1) 
The 2017 amount includes approximately 1.9 million shares of restricted stock awarded to former holders of Clayton Williams Energy outstanding stock awards as part of the Clayton Williams Energy Acquisition. See Note 3. Clayton Williams Energy Acquisition.
(2) 
The 2017 amount includes approximately 720,000 shares of common stock from Clayton Williams Energy shareholders for the payment of withholding taxes due on the vesting of Clayton Williams Energy restricted shares and options pursuant to the purchase and sale agreement.
(3) 
For the years ended December 31, 2017 and 2016, all outstanding options and non-vested restricted shares have been excluded from the calculation of diluted earnings (loss) per share as Noble Energy incurred a loss. Therefore, inclusion of outstanding options and non-vested restricted shares in the calculation of diluted earnings (loss) per share would be anti-dilutive.
Accumulated other comprehensive income (loss) in the shareholders' equity section of the balance sheet
AOCL in the shareholders’ equity section of the balance sheet included:








 
Accumulated Other Comprehensive Loss
(millions)
 
Interest Rate
 Cash Flow
Hedges
 
Pension-
Related and
 Other
 
Total
December 31, 2014
 
$
(23
)
 
$
(67
)
 
$
(90
)
Realized Amounts Reclassified Into Earnings
 
1

 
62

 
63

Unrealized Change in Fair Value
 
—

 
(6
)
 
(6
)
December 31, 2015
 
(22
)
 
(11
)
 
(33
)
Realized Amounts Reclassified Into Earnings
 
1

 
4

 
5

Unrealized Change in Fair Value
 
—

 
(3
)
 
(3
)
December 31, 2016
 
(21
)
 
(10
)
 
(31
)
Realized Amounts Reclassified Into Earnings
 
1

 
4

 
5

Unrealized Change in Fair Value
 
—

 
(4
)
 
(4
)
December 31, 2017
 
$
(20
)
 
$
(10
)
 
$
(30
)