Basis of Presentation Revision of Financial Statements (Tables)

3 Months Ended

Mar. 31, 2015

Error Corrections and Prior Period Adjustments Restatement [Line Items]

Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]

	Three Months Ended March 31, 2015
	As reported		As revised		Change
	(in millions)
REVENUES
Purchased gas and oil sales	$	167.3	$	143.8	$	(23.5	)
Total Revenues	491.6		468.1		(23.5		)
OPERATING EXPENSES
Purchased gas and oil expense	$	169.4	$	145.9	$	(23.5	)
Total Operating Expenses	589.7		566.2		(23.5		)