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Regulatory Matters (Tables)
 12 Months Ended
Dec. 31, 2013
Regulatory Matters [Abstract]  
Schedule of Regulatory Assets and Liabilities
The following is a list of regulatory assets/liabilities reflected on CERC's Consolidated Balance Sheets as of December 31, 2013 and 2012:
 
December 31,
 
2013
 
2012
 
(in millions)
Regulatory assets in other long-term assets (1)
$
100

 
$
105

Regulatory liabilities
(642
)
 
(619
)
Net
$
(542
)
 
$
(514
)
________________
(1)
Regulatory assets that are not earning a return were not material at December 31, 2013 or 2012.