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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The following table summarizes the changes in the carrying amount of goodwill, by reportable segment for the years ended December 31, 2014 and 2013.
| US |  | Andes |  | MCAC |  | Europe |  | Asia |  | Total
Balance as of December 31, 2012 |  |  |  |  |  |  |  |  |  |  |
Goodwill | $ | 2,663 |  |  | $ | 899 |  |  | $ | 149 |  |  | $ | 180 |  |  | $ | 68 |  |  | $ | 3,959 |
Accumulated impairment losses | (1,838 | ) |  | — |  |  | — |  |  | (122 | ) |  | — |  |  | (1,960 | )
Net balance | 825 |  |  | 899 |  |  | 149 |  |  | 58 |  |  | 68 |  |  | 1,999 |
Impairment losses | (314 | ) |  | — |  |  | — |  |  | (58 | ) |  | — |  |  | (372 | )
Other | (5 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | (5 | )
Balance as of December 31, 2013 |  |  |  |  |  |  |  |  |  |  |
Goodwill | 2,658 |  |  | 899 |  |  | 149 |  |  | 180 |  |  | 68 |  |  | 3,954 |
Accumulated impairment losses | (2,152 | ) |  | — |  |  | — |  |  | (180 | ) |  | — |  |  | (2,332 | )
Net balance | 506 |  |  | 899 |  |  | 149 |  |  | — |  |  | 68 |  |  | 1,622 |
Impairment losses | (164 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | (164 | )
Balance as of December 31, 2014 |  |  |  |  |  |  |  |  |  |  |
Goodwill | 2,658 |  |  | 899 |  |  | 149 |  |  | 122 |  | (1) | 68 |  |  | 3,896 |
Accumulated impairment losses | (2,316 | ) |  | — |  |  | — |  |  | (122 | ) |  | — |  |  | (2,438 | )
Net balance | $ | 342 |  |  | $ | 899 |  |  | $ | 149 |  |  | $ | — |  |  | $ | 68 |  |  | $ | 1,458 |
_____________________________ (1) Both the gross carrying amount and the accumulated impairment losses of the Europe segment have been reduced by $58 million with no impact on the net carrying amount for the segment. This relates to Ebute, which had fully impaired goodwill of $58 million and was sold in 2014.
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets | The following tables summarize the balances comprising other intangible assets in the accompanying Consolidated Balance Sheets as of the periods indicated:
| December 31, 2014 |  | December 31, 2013
| Gross Balance |  | Accumulated Amortization |  | Net Balance |  | Gross Balance |  | Accumulated Amortization |  | Net Balance
| (in millions)
Subject to Amortization |  |  |  |  |  |  |  |  |  |  |
Project development rights(1) | $ | 28 |  |  | $ | (1 | ) |  | $ | 27 |  |  | $ | 31 |  |  | $ | (1 | ) |  | $ | 30 |
Sales concessions(2) | 86 |  |  | (41 | ) |  | 45 |  |  | 95 |  |  | (45 | ) |  | 50 |
Contractual payment rights(3) | 69 |  |  | (40 | ) |  | 29 |  |  | 74 |  |  | (33 | ) |  | 41 |
Management rights | 33 |  |  | (13 | ) |  | 20 |  |  | 37 |  |  | (13 | ) |  | 24 |
Emission allowances | 4 |  |  | — |  |  | 4 |  |  | 4 |  |  | — |  |  | 4 |
Contracts | 36 |  |  | (19 | ) |  | 17 |  |  | 46 |  |  | (24 | ) |  | 22 |
Customer contracts and relationships | 63 |  |  | (39 | ) |  | 24 |  |  | 63 |  |  | (34 | ) |  | 29 |
Other(4) | 21 |  |  | (5 | ) |  | 16 |  |  | 20 |  |  | (3 | ) |  | 17 |
Subtotal | 340 |  |  | (158 | ) |  | 182 |  |  | 370 |  |  | (153 | ) |  | 217 |
Indefinite-Lived Intangible Assets |  |  |  |  |  |  |  |  |  |  |
Land use rights | 59 |  |  | — |  |  | 59 |  |  | 46 |  |  | — |  |  | 46 |
Water rights | 20 |  |  | — |  |  | 20 |  |  | 20 |  |  | — |  |  | 20 |
Trademark/Trade name | 5 |  |  | — |  |  | 5 |  |  | 5 |  |  | — |  |  | 5 |
Other | 15 |  |  | — |  |  | 15 |  |  | 9 |  |  | — |  |  | 9 |
Subtotal | 99 |  |  | — |  |  | 99 |  |  | 80 |  |  | — |  |  | 80 |
Total | $ | 439 |  |  | $ | (158 | ) |  | $ | 281 |  |  | $ | 450 |  |  | $ | (153 | ) |  | $ | 297 |
_____________________________
(1) | Represent development rights, including but not limited to, land control, various permits and right to acquire equity interests in development projects resulting from asset acquisitions by our wind operations in the U.K. The balance excludes project development rights of $70 million relating to our Poland wind operations that were fully impaired in the third quarter of 2013 and subsequently sold in November 2013. See Note 23—Discontinued Operations and Held-for-Sale Businesses for further information.
(2) | Excludes net balance of sales concessions of $32 million as of December 31, 2013 relating to our utility businesses in Cameroon that were included in noncurrent assets of discontinued operations. See Note 23—Discontinued Operations and Held for Sale Businesses for further information.
(3) | Represent legal rights to receive system reliability payments from the regulator.
(4) | Includes renewable energy certificates, land-use rights and various other intangible assets none of which is individually significant.
Schedule of Acquired Intangible Assets By Major Class | The following table summarizes, by category, other intangible assets acquired during the periods indicated:
| December 31, 2014
| Amount |  | Subject to Amortization/ Indefinite-Lived |  | Weighted Average Amortization Period |  | Amortization Method
| (in millions) |  |  |  | (in years) |  |
Renewable energy certificates | $ | 3 |  |  | Indefinite |  | N/A |  | N/A
Land-use rights | 16 |  |  | Indefinite |  | N/A |  | N/A
Total | $ | 19 |  |  |  |  |  |  |
| December 31, 2013
| Amount |  | Subject to Amortization/ Indefinite-Lived |  | Weighted Average Amortization Period |  | Amortization Method
| (in millions) |  |  |  | (in years) |  |
Renewable energy certificates | $ | 3 |  |  | Indefinite |  | N/A |  | N/A
Other | 2 |  |  | Various |  | N/A |  | N/A
Total | $ | 5 |  |  |  |  |  |  |
Schedule of Expected Amortization Expense | The following table summarizes the estimated amortization expense, by intangible asset category, for 2015 through 2019:
| 2015 |  | 2016 |  | 2017 |  | 2018 |  | 2019
| (in millions)
Customer relationships & contracts | $ | 3 |  |  | $ | 3 |  |  | $ | 3 |  |  | $ | 3 |  |  | $ | 3 |
Sales concessions | 4 |  |  | 3 |  |  | 3 |  |  | 3 |  |  | 3 |
Contractual payment rights | 1 |  |  | 1 |  |  | 1 |  |  | 1 |  |  | 1 |
All other | 4 |  |  | 4 |  |  | 4 |  |  | 4 |  |  | 3 |
Total | $ | 12 |  |  | $ | 11 |  |  | $ | 11 |  |  | $ | 11 |  |  | $ | 10 |

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- Definition Disclosure of the characteristics, including initial carrying value, residual amount, weighted average useful life, of intangible assets acquired during the period by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by nature or by their use in the operations of the company. + References No definition available. + Details
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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