Early Nuclear Plant Retirements Early Nuclear Plant Retirements (Tables)

6 Months Ended

Jun. 30, 2016

Property, Plant and Equipment [Abstract]

ImplicationsofPotentialEarlyPlantRetirement [Table Text Block]

(in millions)	TMI			Ginna			NMP
Asset Balances
Materials and supplies inventory	$	38		$	30		$	69
Nuclear fuel inventory, net	104			47			235
Completed plant, net	968			125			1,137
Construction work in progress	35			12			70
Liability Balances
Asset retirement obligation	(485		)	(659		)	(770		)
NRC License Renewal Term	2034			2029			2029 (unit 1)
							2046 (unit 2)

Incremental Expense Plant Retirement [Table Text Block]