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Utility Regulatory Assets and Liabilities and Regulatory Matters (Tables) | 6 Months Ended
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Mar. 31, 2014
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:
|  | March 31, 2014 |  | September 30, 2013 |  | March 31, 2013
Regulatory assets: |  |  |  |  |  |
Income taxes recoverable |  | $ | 106.8 |  |  | $ | 106.1 |  |  | $ | 104.2 |
Underfunded pension and postretirement plans |  | 91.0 |  |  | 94.5 |  |  | 181.3 |
Environmental costs |  | 14.5 |  |  | 17.1 |  |  | 16.8 |
Deferred fuel and power costs |  | 4.3 |  |  | 8.3 |  |  | 2.1 |
Removal costs, net |  | 14.4 |  |  | 13.3 |  |  | 11.9 |
Other |  | 4.9 |  |  | 5.6 |  |  | 6.0 |
Total regulatory assets |  | $ | 235.9 |  |  | $ | 244.9 |  |  | $ | 322.3 |
Regulatory liabilities: |  |  |  |  |  |
Postretirement benefits |  | $ | 17.2 |  |  | $ | 16.5 |  |  | $ | 13.9 |
Environmental overcollections |  | 1.9 |  |  | 2.6 |  |  | 3.0 |
Deferred fuel and power refunds |  | 3.2 |  |  | 8.3 |  |  | 31.2 |
State tax benefits—distribution system repairs |  | 9.0 |  |  | 8.4 |  |  | 7.9 |
Other |  | 1.8 |  |  | 1.5 |  |  | 0.7 |
Total regulatory liabilities |  | $ | 33.1 |  |  | $ | 37.3 |  |  | $ | 56.7 |

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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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