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Regulatory Matters (Tables) (Consumers Energy Company [Member]) | 6 Months Ended
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Jun. 30, 2011
Electric Rate Case [Member] |
Components of Requested Annual Rate Increase |
In Millions |
Components of the increase in revenue |  |  |  |
Investment in rate base |  | $ | 81 |
Recovery of depreciation and property taxes |  |  | 70 |
Impact of sales declines |  |  | 50 |
Reduced operating and maintenance costs |  |  | (4 | )
Cost of capital |  |  | (2 | )
Total |  | $ | 195 |
Power Supply Cost Recover (PSCR) [Member] |
Reconciliation Filings Pending with MPSC |
PSCR Year |  | Date Filed |  |  | Net Underrecovery |  |  | PSCR Cost of Power Sold |
2010 |  | March 2011 |  |  | $ 15 million |  |  | $ 1.7 billion |
Gas Cost Recover (GCR) [Member] |
Reconciliation Filings Pending with MPSC |
GCR Year |  | Date Filed |  |  | Net Overrecovery |  |  | GCR Cost of Gas Sold |
2009-2010 |  | June 2010 |  |  | $ 1 million |  |  | $ 1.3 billion |
2010-2011 |  | June 2011 |  |  | 6 million |  |  | 1.2 billion |
Gas Rate Case [Member] |
Schedule Of Rate Increase Authorized And Requested |
In Millions |
|  |  |  |  |  | Increase Originally |  |  |  |
|  | Increase Authorized |  |  | Requested by |  |  |  |
Components of the increase in revenue |  | by the MPSC |  |  | Consumers |  |  | Difference |
Investment in rate base |  | $ | 29 |  |  | $ | 30 |  |  | $ | (1 | )
Impact of sales declines |  |  | 15 |  |  |  | 4 |  |  |  | 11 |
Recovery of operating and maintenance costs |  |  | 2 |  |  |  | 16 |  |  |  | (14 | )
Cost of capital |  |  | (15 | ) |  |  | 5 |  |  |  | (20 | )
Total |  | $ | 31 |  |  | $ | 55 |  |  | $ | (24 | )

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