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Acquisitions and Dispositions (Tables) | 12 Months Ended
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Dec. 31, 2012
Acquisitions And Dispositions Tables [Abstract] |
Schedule of Purchase Price Allocation [Table Text Block] |
|  |  | Preliminary |  | Measurement Period Adjustments |  | Final
|  |  | (in millions)
Cash |  | $ | 116 |  | $ | - |  | $ | 116
Accounts receivable |  |  | 278 |  |  | - |  |  | 278
Inventory |  |  | 124 |  |  | - |  |  | 124
Other current assets |  |  | 41 |  |  | - |  |  | 41
Property, plant and equipment |  |  | 2,549 |  |  | (71)(1) |  |  | 2,478
Intangible assets subject to amortization |  |  | 166 |  |  | (19)(2) |  |  | 147
Intangible assets - indefinite-lived |  |  | 5 |  |  | - |  |  | 5
Regulatory assets |  |  | 201 |  |  | 16(3) |  |  | 217
Other noncurrent assets |  |  | 58 |  |  | - |  |  | 58
Current liabilities |  |  | (401) |  |  | (5) |  |  | (406)
Non-recourse debt |  |  | (1,255) |  |  | - |  |  | (1,255)
Deferred income taxes |  |  | (558) |  |  | 7(4) |  |  | (551)
Regulatory liabilities |  |  | (117) |  |  | - |  |  | (117)
Other noncurrent liabilities |  |  | (195) |  |  | (15)(5) |  |  | (210)
Redeemable preferred stock |  |  | (18) |  |  | - |  |  | (18)
| Net identifiable assets acquired |  |  | 994 |  |  | (87) |  |  | 907
Goodwill |  |  | 2,489 |  |  | 87(6) |  |  | 2,576
| Net assets acquired |  | $ | 3,483 |  | $ | - |  |  | 3,483

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- Definition Tabular disclosure of all of the fair values of the purchase price and assets and liabilities acquired in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
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