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Regulatory Assets and Liabilities | 9 Months Ended
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Sep. 30, 2011
Regulatory Assets and Liabilities Disclosure [Abstract] |
Regulatory Assets and Liabilities | Regulatory Assets and Liabilities Regulatory assets included on the consolidated balance sheets are:
(in millions) | September 30, 2011 |  | December 31, 2010
Current: |  |  |
Regulatory balancing accounts | $ | 191 |  |  | $ | 213 |
Energy derivatives | 262 |  |  | 162 |
Other | 1 |  |  | 3 |
Total Current | 454 |  |  | 378 |
Long-term: |  |  |
Deferred income taxes – net | 1,938 |  |  | 1,855 |
Pensions and other postretirement benefits | 1,084 |  |  | 1,097 |
Unamortized generation investment – net | 323 |  |  | 355 |
Unamortized loss on reacquired debt | 253 |  |  | 268 |
Energy derivatives | 505 |  |  | 177 |
Nuclear related investment – net | 160 |  |  | 154 |
Unamortized transmission and distribution investment – net | 153 |  |  | 105 |
Regulatory balancing accounts | 62 |  |  | 56 |
Other | 299 |  |  | 280 |
Total Long-term | 4,777 |  |  | 4,347 |
Total Regulatory Assets | $ | 5,231 |  |  | $ | 4,725 |
Regulatory liabilities included on the consolidated balance sheets are:
(in millions) | September 30, 2011 |  | December 31, 2010
Current: |  |  |
Regulatory balancing accounts | $ | 728 |  |  | $ | 733 |
Other | 6 |  |  | 5 |
Total Current | 734 |  |  | 738 |
Long-term: |  |  |
Costs of removal | 2,663 |  |  | 2,623 |
Asset Retirement Obligations | 944 |  |  | 1,099 |
Regulatory balancing accounts | 873 |  |  | 802 |
Other | 1 |  |  | — |
Total Long-term | 4,481 |  |  | 4,524 |
Total Regulatory Liabilities | $ | 5,215 |  |  | $ | 5,262 |

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- Definition Detailed information about regulatory assets and liabilities that result from rate actions of a regulator. Rate actions from a regulator can impose a asset or liability on a regulated enterprise resulting in a regulatory asset or regulatory liability. + Details
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- Details
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