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Organization and Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2013
Accounting Policies [Abstract]  
Change in ARO (asset retirement obligation)
The change in our ARO for continuing operations for each of the three years ended December 31, is set forth below:
 
 
 
2013
 
2012
 
2011
 
 
(In millions)
Balance at January 1
 
$
100

 
$
106

 
$
96

Accretion expense
 
8

 
8

 
8

Additions
 
12

 
20

 
5

Revisions
 
8

 
12

 
3

Settlements(1)
 
(8
)
 
(46
)
 
(6
)
Balance at December 31
 
120

 
100

 
106

Less: Current portion of ARO at December 31
 
(5
)
 
(5
)
 
(4
)
Total long-term ARO at December 31
 
$
115

 
$
95

 
$
102

_________________
(1)
For the year ended December 31, 2012, settlements include $28 million related to the sale of our Gulf of Mexico assets. See Note 4, “Oil and Gas Assets.”
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
The change in AOCI for the indicated periods is set forth below:
 
 
Unrealized Gains / (Losses) in
Accumulated Other Comprehensive Income
 
 
Available-for-Sale Securities
 
Post-Retirement Benefits
 
Total
 
 
(In millions, net of tax)
Balance at January 1, 2011
 
$
(12
)
 
$
—

 
$
(12
)
Current period other comprehensive income (loss)
 
3

 
(1
)
 
2

Balance at December 31, 2011
 
(9
)
 
(1
)
 
(10
)
Current period other comprehensive income (loss)
 
3

 
—

 
3

Balance at December 31, 2012
 
(6
)
 
(1
)
 
(7
)
Other comprehensive income (loss) before reclassifications
 
3

 
2

 
5

Amounts reclassified from accumulated other comprehensive income
 
4

 
—

 
4

Net current period other comprehensive income (loss)
 
7

 
2

 
9

Balance at December 31, 2013
 
$
1

 
$
1

 
$
2