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Utility Regulatory Assets and Liabilities and Regulatory Matters (Tables) | 12 Months Ended
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Sep. 30, 2015
Regulated Operations [Abstract] |
Regulatory Assets and Liabilities Associated with Utilities | The following regulatory assets and liabilities associated with Utilities are included in our accompanying Consolidated Balance Sheets at September 30:
| 2015 |  | 2014
Regulatory assets: |  |  |
Income taxes recoverable | $ | 115.9 |  |  | $ | 110.7 |
Underfunded pension and postretirement plans | 140.8 |  |  | 110.1 |
Environmental costs | 20.0 |  |  | 14.6 |
Deferred fuel and power costs | — |  |  | 11.8 |
Removal costs, net | 21.2 |  |  | 16.8 |
Other | 6.3 |  |  | 4.2 |
Total regulatory assets | $ | 304.2 |  |  | $ | 268.2 |
Regulatory liabilities (a): |  |  |
Postretirement benefits | $ | 20.0 |  |  | $ | 18.6 |
Environmental overcollections | — |  |  | 0.3 |
Deferred fuel and power refunds | 36.6 |  |  | 0.3 |
State tax benefits — distribution system repairs | 13.3 |  |  | 10.1 |
Other | 1.1 |  |  | 3.2 |
Total regulatory liabilities | $ | 71.0 |  |  | $ | 32.5 |
(a) Regulatory liabilities are recorded in other current and other noncurrent liabilities in the Consolidated Balance Sheets.

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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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