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Regulatory Matters (Policies)
12 Months Ended
Dec. 31, 2011
Regulatory Matters [Abstract]  
Regulatory Assets and Liabilities [Policy Text Block]
Our regulated utility operations are subject to the accounting standards on Regulated Operations. We capitalize, as regulatory assets, incurred costs which are probable of recovery in future utility rates. Regulatory liabilities represent amounts expected to be refunded or credited to customers in rates.