Regulatory Accounting

3 Months Ended

Mar. 31, 2013

Regulatory Matters [Abstract]

Regulatory Matters [Text Block]

Regulatory Accounting

As of March 31, 2013, CenterPoint Houston has not recognized an allowed equity return of $545 million because such return will be recognized as it is recovered in rates. During both the three months ended March 31, 2012 and 2013, CenterPoint Houston recognized approximately $8 million of the allowed equity return not previously recognized.