Impairment, Disposition and Assets and Liabilities Held for Sale (Tables)

3 Months Ended

Mar. 31, 2017

Generation And Marketing [Member]

Assets and Liabilities Held for Sale

	March 31,		December 31,
	2017		2016
Assets:	(in millions)
Fuel	$	6.9	$	145.5
Materials and Supplies	0.1		49.4
Property, Plant and Equipment - Net	0.8		1,756.2
Other Class of Assets That Are Not Major	1.9		0.1
Total Assets Classified as Held for Sale on the Balance Sheets	$	9.7	$	1,951.2
Liabilities:
Long-term Debt	$	—	$	134.8
Waterford Plant Upgrade Liability	—		52.2
Asset Retirement Obligations	1.9		36.7
Other Classes of Liabilities That Are Not Major	1.6		12.2
Total Liabilities Classified as Held for Sale on the Balance Sheets	$	3.5	$	235.9