Plant acquisition: (Tables)

12 Months Ended

Dec. 31, 2013

Plant acquisition:

Schedule of identifiable assets acquired and liabilities assumed in the Smith acquisition

		(in millions)
Recognized fair value amounts of identifiable assets acquired and liabilities assumed:
Property, plant and equipment	$	456.7
Inventory		34.0
Other current assets		4.6
Power purchase and sale agreement		40.4
Emission credits		0.2
Current liabilities		(5.6	)
Total identifiable net assets	$	530.3