XML 83 R55.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Property, Plant, and Equipment (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Disclosure of detailed information about property, plant and equipment [abstract] |
Disclosure of detailed information about property, plant and equipment | Estimated useful lives of the components of depreciable assets, categorized by asset class, are as follows:
Coal generation | 2-14 years
Gas generation | 2-30 years
Hydro generation | 3-60 years
Wind generation | 3-30 years
Mining property and equipment | 2-14 years
Capital spares and other | 2-30 years
A reconciliation of the changes in the carrying amount of PP&E is as follows:
| Land |  | Coal generation |  | Gas generation |  | Renewable generation |  | Mining property and equipment |  | Assets under construction |  | Capital spares and other(1) |  | Total |
Cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
As at Dec. 31, 2015 | 95 |  | 6,091 |  | 1,484 |  | 3,265 |  | 1,208 |  | 351 |  | 360 |  | 12,854 |
Additions | 2 |  | — |  | — |  | 1 |  | — |  | 353 |  | 2 |  | 358 |
Additions - finance lease | — |  | — |  | — |  | — |  | 7 |  | — |  | — |  | 7 |
Disposals | (1 | ) | — |  | (3 | ) | (1 | ) | (1 | ) | — |  | (3 | ) | (9 | )
Impairment charge - Wintering Hills (Note 4) | — |  | — |  | — |  | (28 | ) | — |  | — |  | — |  | (28 | )
Reclassification to held for sale (Note 4) | — |  | — |  | — |  | (67 | ) | — |  | — |  | — |  | (67 | )
Other (Note 6) | — |  | — |  | — |  | — |  | — |  | — |  | (1 | ) | (1 | )
Revisions and additions to decommissioning and restoration costs | — |  | 14 |  | 12 |  | 4 |  | 36 |  | — |  | 5 |  | 71 |
Retirement of assets | — |  | (96 | ) | (3 | ) | (14 | ) | (6 | ) | — |  | (3 | ) | (122 | )
Change in foreign exchange rates | (1 | ) | (38 | ) | (16 | ) | (10 | ) | (3 | ) | (13 | ) | (4 | ) | (85 | )
Transfers(2) | — |  | (95 | ) | 51 |  | 62 |  | 24 |  | (284 | ) | 37 |  | (205 | )
As at Dec. 31, 2016 | 95 |  | 5,876 |  | 1,525 |  | 3,212 |  | 1,265 |  | 407 |  | 393 |  | 12,773 |
Additions | — |  | — |  | — |  | — |  | — |  | 334 |  | 4 |  | 338 |
Additions - finance lease | — |  | — |  | — |  | — |  | 14 |  | — |  | — |  | 14 |
Disposals | — |  | — |  | (16 | ) | (1 | ) | (1 | ) | — |  | (1 | ) | (19 | )
Impairment charge - Sundance Unit 1 (Note 6) | — |  | (20 | ) | — |  | — |  | — |  | — |  | — |  | (20 | )
Revisions and additions to decommissioning and restoration costs | — |  | 82 |  | 12 |  | 15 |  | 42 |  | — |  | — |  | 151 |
Retirement of assets | — |  | (84 | ) | (3 | ) | (4 | ) | (22 | ) | — |  | (6 | ) | (119 | )
Change in foreign exchange rates | (1 | ) | (87 | ) | 3 |  | (23 | ) | (7 | ) | (2 | ) | (2 | ) | (119 | )
Transfers(3) | 1 |  | 121 |  | 461 |  | 29 |  | 24 |  | (644 | ) | (18 | ) | (26 | )
As at Dec. 31, 2017 | 95 |  | 5,888 |  | 1,982 |  | 3,228 |  | 1,315 |  | 95 |  | 370 |  | 12,973 |
Accumulated depreciation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
As at Dec. 31, 2015 | — |  | 3,280 |  | 873 |  | 810 |  | 604 |  | — |  | 114 |  | 5,681 |
Depreciation | — |  | 284 |  | 118 |  | 127 |  | 59 |  | — |  | 19 |  | 607 |
Retirement of assets | — |  | (85 | ) | (4 | ) | (7 | ) | (2 | ) | — |  | (3 | ) | (101 | )
Disposals | — |  | — |  | (1 | ) | — |  | (1 | ) | — |  | — |  | (2 | )
Reclassification to held for sale (Note 4) | — |  | — |  | — |  | (6 | ) | — |  | — |  | — |  | (6 | )
Change in foreign exchange rates | — |  | (28 | ) | (10 | ) | — |  | (1 | ) | — |  | — |  | (39 | )
Transfers | — |  | (239 | ) | 51 |  | (2 | ) | — |  | — |  | (1 | ) | (191 | )
As at Dec. 31, 2016 | — |  | 3,212 |  | 1,027 |  | 922 |  | 659 |  | — |  | 129 |  | 5,949 |
Depreciation | — |  | 351 |  | 67 |  | 123 |  | 76 |  | — |  | 18 |  | 635 |
Retirement of assets | — |  | (62 | ) | (2 | ) | (3 | ) | (18 | ) | — |  | (5 | ) | (90 | )
Disposals | — |  | — |  | (11 | ) | (1 | ) | — |  | — |  | — |  | (12 | )
Change in foreign exchange rates | — |  | (67 | ) | (1 | ) | (4 | ) | (4 | ) | — |  | — |  | (76 | )
Transfers(2) | — |  | (3 | ) | (8 | ) | — |  | — |  | — |  | — |  | (11 | )
As at Dec. 31, 2017 | — |  | 3,431 |  | 1,072 |  | 1,037 |  | 713 |  | — |  | 142 |  | 6,395 |
Carrying amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
As at Dec. 31, 2015 | 95 |  | 2,811 |  | 611 |  | 2,455 |  | 604 |  | 351 |  | 246 |  | 7,173 |
As at Dec. 31, 2016 | 95 |  | 2,664 |  | 498 |  | 2,290 |  | 606 |  | 407 |  | 264 |  | 6,824 |
As at Dec. 31, 2017 | 95 |  | 2,457 |  | 910 |  | 2,191 |  | 602 |  | 95 |  | 228 |  | 6,578 |
(1) Includes major spare parts and stand-by equipment available, but not in service, and spare parts used for routine, preventive, or planned maintenance. (2) Net transfers of $14 million relate to the transfer of gas equipment to finance lease receivables. (3) During the second quarter of 2017, the Corporation reclassified approximately $13 million of capital spares and other assets to inventory.

X
- Definition The disclosure of detailed information about property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 73 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_DisclosureOfPropertyPlantAndEquipmentAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration