Basis of Presentation Revision of Financial Statements (Tables)

9 Months Ended

Sep. 30, 2015

Error Corrections and Prior Period Adjustments Restatement [Line Items]

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

	Three Months Ended							Nine Months Ended
	September 30, 2015							September 30, 2015
	As reported		As revised		Change			As reported		As revised		Change
REVENUES	(in millions)
Purchased gas and oil sales	$	176.3	$	147.2	$	(29.1	)	$	558.6	$	472.0	$	(86.6	)
Total Revenues	536.7		507.6		(29.1		)	1,636.9		1,550.3		(86.6		)
OPERATING EXPENSES
Purchased gas and oil expense	$	175.1	$	146.0	$	(29.1	)	$	561.7	$	475.1	$	(86.6	)
Total Operating Expenses	637.3		608.2		(29.1		)	1,876.8		1,790.2		(86.6		)