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Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of detailed information about goodwill [Abstract] |
Disclosure of detailed information about goodwill | Goodwill acquired through business combinations has been allocated to CGUs that are expected to benefit from the synergies of the acquisitions. Goodwill by segments are as follows:
As at Dec. 31 | 2017 |  | 2016 |
Hydro | 259 |  | 259 |
Wind and Solar | 174 |  | 175 |
Energy Marketing | 30 |  | 30 |
Total goodwill | 463 |  | 464 |
A reconciliation of the changes in the carrying amount of intangible assets is as follows:
| Coal rights |  | Software and other |  | Power sale contracts |  | Intangibles under development |  | Total |
Cost |  |  |  |  |  |  |  |  |  |
As at Dec. 31, 2015 | 178 |  | 256 |  | 223 |  | 15 |  | 672 |
Additions | — |  | — |  | — |  | 21 |  | 21 |
Additions - capital lease | — |  | 3 |  | — |  | — |  | 3 |
Retirements | — |  | (3 | ) | — |  | — |  | (3 | )
Change in foreign exchange rates | — |  | (1 | ) | — |  | (1 | ) | (2 | )
Transfers | — |  | 13 |  | — |  | (11 | ) | 2 |
As at Dec. 31, 2016 | 178 |  | 268 |  | 223 |  | 24 |  | 693 |
Additions | — |  | 31 |  | — |  | 20 |  | 51 |
Change in foreign exchange rates | — |  | (3 | ) | — |  | — |  | (3 | )
Transfers | — |  | 18 |  | — |  | (15 | ) | 3 |
As at Dec. 31, 2017 | 178 |  | 314 |  | 223 |  | 29 |  | 744 |
Accumulated amortization |  |  |  |  |  |  |  |  |  |
As at Dec. 31, 2015 | 109 |  | 142 |  | 52 |  | — |  | 303 |
Amortization | 6 |  | 24 |  | 8 |  | — |  | 38 |
Retirements | — |  | (3 | ) | — |  | — |  | (3 | )
As at Dec. 31, 2016 | 115 |  | 163 |  | 60 |  | — |  | 338 |
Amortization | 8 |  | 24 |  | 9 |  | — |  | 41 |
Change in foreign exchange rates | — |  | 1 |  | — |  | — |  | 1 |
Transfers | 2 |  | — |  | (2 | ) | — |  | — |
As at Dec. 31, 2017 | 125 |  | 188 |  | 67 |  | — |  | 380 |
Carrying amount |  |  |  |  |  |  |  |  |  |
As at Dec. 31, 2015 | 69 |  | 114 |  | 171 |  | 15 |  | 369 |
As at Dec. 31, 2016 | 63 |  | 105 |  | 163 |  | 24 |  | 355 |
As at Dec. 31, 2017 | 53 |  | 126 |  | 156 |  | 29 |  | 364 |

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- Definition The disclosure of the reconciliation of changes in intangible assets and goodwill. [Refer: Intangible assets and goodwill] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 38 -IssueDate 2017-01-01 -Paragraph 118 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2017-03-01&anchor=para_118&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Disclosure of detailed information about goodwill [Abstract] + References No definition available. + Details
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