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Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2013
Accounting Policies [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
As shown in the following tables, amounts recorded to accumulated other comprehensive loss for the year ended December 31, 2013 include unrealized gains and losses on available-for-sale securities, which comprise the net unrealized gains and losses on investments, and changes in benefit obligations, consisting of deferred actuarial losses, prior service costs and transition amounts related to pension and other postretirement benefit plans.

 
Changes in Accumulated Other Comprehensive Loss by Component (a)
 
For The Year Ended December 31, 2013
 
Net Unrealized Gain/(Loss) on Investments
 
Benefit Obligations (b)
 
Total
 
(In millions)
Beginning balance, December 31, 2012
$
—

 
$
(22
)
 
$
(22
)
Other comprehensive income before reclassifications
1

 
3

 
4

Amounts reclassified from accumulated other comprehensive income (loss)
—

 
2

 
2

Net current-period other comprehensive income
1

 
5

 
6

Ending balance, December 31, 2013
$
1

 
$
(17
)
 
$
(16
)
_______________________________________
(a) All amounts are net of tax.
(b) The amounts reclassified from accumulated other comprehensive income are included in the computation of the net periodic pension and other postretirement benefit costs (see Note 15).
Schedule of Finite-Lived Intangible Assets [Table Text Block]
The Company has certain intangible assets relating to emission allowances and renewable energy credits as shown below:

 
December 31,
 
December 31,
 
2013
 
2012
 
(In millions)
Emission allowances
$
2

 
$
6

Renewable energy credits
51

 
44

 
53

 
50

Less current intangible assets
12

 
20

 
$
41

 
$
30