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Implications of Potential Early Plant Retirements Implications of Potential Early Plant Retirements (Tables)
 12 Months Ended
Dec. 31, 2015
Implications of Potential Early Plant Retirements [Abstract]  
Implications of Potential Early Plant Retirement [Table Text Block] [Table Text Block]
(in millions)
Quad Cities
 
Clinton
 
Ginna
 
Total
Asset Balances
 
 
 
 
 
 
 
Materials and supplies inventory
$
50

 
$
57

 
$
29

 
$
136

Nuclear fuel inventory, net
218

 
107

 
60

 
385

Completed plant, net
1,030

 
579

 
127

 
1,736

Construction work in progress
11

 
9

 
11

 
31

 
 
 
 
 
 
 
 
Liability Balances
 
 
 
 
 
 
 
Asset retirement obligation
(698
)
 
(401
)
 
(644
)
 
(1,743
)
 
 
 
 
 
 
 
 
NRC License Renewal Term
2032

 
2046

(a) 
2029