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Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2013
Asset Retirement Obligations (Tables) [Abstract]  
Fair values of the decommissioning trust assets Text Block
The fair values of the decommissioning trust assets as of December 31, 2013 and 2012 were as follows:
 
 
2013
 
2012
 
 
(In millions)
FirstEnergy
 
$
2,201

 
$
2,204

FES
 
$
1,276

 
$
1,283
Changes to the asset retirement obligations
The following table summarizes the changes to the ARO balances during 2013 and 2012:
ARO Reconciliation
 
FirstEnergy
 
FES
 
 
(In millions)
Balance, January 1, 2012
 
$
1,497

 
$
904

Liabilities settled
 
(2
)
 
(1
)
Accretion
 
104

 
62

Balance, December 31, 2012
 
$
1,599

 
$
965

Liabilities settled
 
(18
)
 
(18
)
Accretion
 
115

 
71

Revisions in estimated cash flows
 
(18
)
 
(3
)
Balance, December 31, 2013
 
$
1,678

 
$
1,015