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Utility Regulatory Assets and Liabilities and Regulatory Matters (Tables) | 3 Months Ended
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Dec. 31, 2013
Regulated Operations [Abstract] |
Regulatory assets and liabilities associated with Gas Utility and Electric Utility | The following regulatory assets and liabilities associated with Gas Utility and Electric Utility are included in our accompanying Condensed Consolidated Balance Sheets:
|  | December 31, 2013 |  | September 30, 2013 |  | December 31, 2012
Regulatory assets: |  |  |  |  |  |
Income taxes recoverable |  | $ | 106.4 |  |  | $ | 106.1 |  |  | $ | 103.7 |
Underfunded pension and postretirement plans |  | 92.8 |  |  | 94.5 |  |  | 184.8 |
Environmental costs |  | 14.9 |  |  | 17.1 |  |  | 17.1 |
Deferred fuel and power costs |  | 0.4 |  |  | 8.3 |  |  | 7.8 |
Removal costs, net |  | 13.7 |  |  | 13.3 |  |  | 11.5 |
Other |  | 5.7 |  |  | 5.6 |  |  | 5.7 |
Total regulatory assets |  | $ | 233.9 |  |  | $ | 244.9 |  |  | $ | 330.6 |
Regulatory liabilities: |  |  |  |  |  |
Postretirement benefits |  | $ | 16.8 |  |  | $ | 16.5 |  |  | $ | 13.5 |
Environmental overcollections |  | 2.3 |  |  | 2.6 |  |  | 3.1 |
Deferred fuel and power refunds |  | 7.5 |  |  | 8.3 |  |  | 1.9 |
State tax benefits—distribution system repairs |  | 8.7 |  |  | 8.4 |  |  | 7.7 |
Other |  | 1.3 |  |  | 1.5 |  |  | 0.6 |
Total regulatory liabilities |  | $ | 36.6 |  |  | $ | 37.3 |  |  | $ | 26.8 |

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- Definition Tabular disclosure of assets and liabilities that are created when regulatory agencies permit public utilities to defer certain costs or defer recognition of certain revenues included in rate-setting to the Balance Sheet. + References No definition available. + Details
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- Details
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