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Property, Plant and Equipment (Components of PP&E) (Details) (USD $) |  |  |  |  | 12 Months Ended |  |  | 12 Months Ended |  |  | 12 Months Ended |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 Electric generation and distribution facilities | Dec. 31, 2012 Electric generation and distribution facilities | Dec. 31, 2013 Electric generation and distribution facilities Minimum | Dec. 31, 2013 Electric generation and distribution facilities Maximum | Dec. 31, 2013 Other buildings | Dec. 31, 2012 Other buildings | Dec. 31, 2013 Other buildings Minimum | Dec. 31, 2013 Other buildings Maximum | Dec. 31, 2013 Furniture, fixtures and equipment | Dec. 31, 2012 Furniture, fixtures and equipment | Dec. 31, 2013 Furniture, fixtures and equipment Minimum | Dec. 31, 2013 Furniture, fixtures and equipment Maximum | Dec. 31, 2013 Other | Dec. 31, 2012 Other | Dec. 31, 2013 Other Minimum | Dec. 31, 2013 Other Maximum
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Useful Life |  |  |  |  |  |  | 6 years | 68 years |  |  | 5 years | 50 years |  |  | 3 years | 30 years |  |  | 1 year | 46 years
Electric generation, distribution assets and other | $ 30,596,000,000 |  | $ 30,278,000,000 |  | $ 27,619,000,000 | $ 26,385,000,000 |  |  | $ 1,726,000,000 | $ 2,616,000,000 |  |  | $ 312,000,000 | $ 386,000,000 |  |  | $ 939,000,000 | $ 891,000,000 |  |
Accumulated depreciation | (9,604,000,000) |  | (9,145,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net electric generation and distribution assets and other | 20,992,000,000 | [1],[2] | 21,133,000,000 | [1],[2] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net electronic generation and distribution assets and other related to held for sale business | 1,200,000,000 |  | 1,300,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized computer software, net | $ 133,000,000 |  | $ 141,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Net electric generation and distribution assets and other related to the Company's held-for-sale businesses of $1.2 billion and $1.3 billion as of December 31, 2013 and 2012, respectively, were excluded from the table above and were included in the noncurrent assets of discontinued and held-for-sale businesses in the consolidated balance sheets.
[2] | Net electric generation and distribution assets, and other include unamortized internal use software costs of $133 million and $141 million as of December 31, 2013 and 2012, respectively.

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