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Regulatory Assets and Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2013
Regulatory Assets [Line Items] |
Schedule of Regulatory Assets and Liabilities [Table Text Block] | Regulatory assets and liabilities consist of the following (dollars in millions):
| Weighted Average Remaining Life (1) |  | As of December 31,
| 2013 |  | 2012
| Current |  | Noncurrent |  | Current |  | Noncurrent
Regulatory assets: |  |  |  |  |  |  |  |  |
Price risk management (2) | 6 years |  | $ | 36 |  |  | $ | 140 |  |  | $ | 123 |  |  | $ | 71 |
Pension and other postretirement plans (2) | (3) |  | — |  |  | 194 |  |  | — |  |  | 321 |
Deferred income taxes (2) | (4) |  | — |  |  | 76 |  |  | — |  |  | 80 |
Deferred broker settlements (2) | 1 year |  | 12 |  |  | 1 |  |  | 20 |  |  | 1 |
Debt issuance costs (2) | 8 years |  | — |  |  | 17 |  |  | — |  |  | 22 |
Deferred capital projects | 2 years |  | 16 |  |  | 18 |  |  | — |  |  | 16 |
Other (5) | Various |  | 2 |  |  | 18 |  |  | 1 |  |  | 13 |
Total regulatory assets |  |  | $ | 66 |  |  | $ | 464 |  |  | $ | 144 |  |  | $ | 524 |
Regulatory liabilities: |  |  |  |  |  |  |  |  |
Asset retirement removal costs (7) | (4) |  | $ | — |  |  | $ | 747 |  |  | $ | — |  |  | $ | 692 |
Trojan decommissioning activities | (6) |  | — |  |  | 41 |  |  | — |  |  | — |
Asset retirement obligations (7) | (4) |  | — |  |  | 39 |  |  | — |  |  | 39 |
Other | Various |  | 1 |  |  | 38 |  |  | 12 |  |  | 34 |
Total regulatory liabilities |  |  | $ | 1 |  | (8) | $ | 865 |  |  | $ | 12 |  | (8) | $ | 765 |
(1) | As of December 31, 2013.
(2) | Does not include a return on investment.
(3) | Recovery expected over the average service life of employees. For additional information, see Note 2, Summary of Significant Accounting Policies.
(4) | Recovery expected over the estimated lives of the assets.
(5) | Of the total other unamortized regulatory asset balances, a return is recorded on $16 million and $15 million as of December 31, 2013 and 2012, respectively.
(6) | Refund period not yet determined.
(7) | Included in rate base for ratemaking purposes.
(8) | Included in Accrued expenses and other current liabilities on the consolidated balance sheets.

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- Definition Tabular disclosure of assets and liabilities that are created in connection with regulatory accounting [Table Text Block] + References No definition available. + Details
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- Details
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