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Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2014

Environmental Obligations

The following table sets forth a summary of changes in the Company’s liability for Environmental Obligations for the years ended December 31, 2014 and 2013.

Environmental Obligations

		(millions)
		Fitchburg								Northern Utilities								Total
		2014				2013				2014				2013				2014				2013
Total Balance at Beginning of Period		$	12.0			$	12.0			$	2.8			$	2.8			$	14.8			$	14.8
Additions			—				0.2				1.3				0.4				1.3				0.6
Less: Payments / Reductions			10.1				0.2				0.5				0.4				10.6				0.6
Total Balance at End of Period		$	1.9			$	12.0			$	3.6			$	2.8			$	5.5			$	14.8
Less: Current Portion			1.9				—				1.6				1.0				3.5				1.0
Noncurrent Balance at December 31, 2014		$	—			$	12.0			$	2.0			$	1.8			$	2.0			$	13.8

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Schedule Of Environmental Remediation Obligations Table [Text Block]

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