Unaudited Quarterly Information (Tables)

12 Months Ended

Dec. 31, 2014

Unaudited Quarterly Information [Abstract]

Quarterly financial data

Summarized quarterly financial data is as follows:

	Year Ended December 31, 2014
	First Quarter		Second Quarter		Third Quarter			Fourth Quarter
	(in millions)
Revenues	$	2,531	$	1,183	$	964		$	1,689
Operating income (loss)	188		39		(3		)	111
Net income	152		48		28			95

	Year Ended December 31, 2013
	First Quarter		Second Quarter (1)			Third Quarter		Fourth Quarter
	(in millions)
Revenues	$	1,853	$	1,235		$	891	$	1,543
Operating income	250		56			4		91
Net income (loss)	128		(162		)	32		66

(1) Effective May 1, 2013, CERC Corp. contributed CenterPoint Midstream to Enable.  See Note 2(b) and Note 10 for further discussion on the formation of Enable and CERC’s investment in Enable, respectively.