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Early Nuclear Plant Retirements Early Nuclear Plant Retirements (Tables)
12 Months Ended
Dec. 31, 2016
Implications of Potential Early Plant Retirements [Abstract]  
Implications of Potential Early Plant Retirement [Table Text Block] [Table Text Block]

(in millions)
TMI
Asset Balances
 
Materials and supplies inventory
$
39

Nuclear fuel inventory, net
83

Completed plant, net
1,015

Construction work in progress
37

 
 
Liability Balances
 
Asset retirement obligation
(565
)
 
 
NRC License Renewal Term
2034