Unconsolidated Affiliates (Tables)

9 Months Ended

Sep. 30, 2013

Investment in Unconsolidated Affiliates [Abstract]

Summary Investment Holdings [Table Text Block]

	December 31, 2012		September 30, 2013
	(in millions)
Enable	$	—	$	4,326
SESH	404		199
Other	1		—
Total	$	405	$	4,525

Schedule of Equity in Earning of Unconsolidated Affiliates [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2013		2012		2013
	(in millions)
Enable	$	—	$	77	$	—	$	110
SESH	8		3		20		12
Other	—		—		5		—
	$	8	$	80	$	25	$	122

Summarized income information for Enable from formation on May 1, 2013 through September 30, 2013, based on the Enogex assets recorded at estimated fair value on the Closing Date, is as follows (in millions):

Operating Revenues	$	1,298
Gross Margin	545
Operating Income	207
Net Income from Controlling Interest	188
CERC's 58.3% interest	$	110

Schedule of Balance Sheet of Unconsolidated Affiliate [Table Text Block]

Current assets	$	428
Non-current assets	10,537
Current liabilities	622
Non-current liabilities	2,140