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Asset Impairment Charges (Reversals) (Tables) | 12 Months Ended
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Dec. 31, 2024
Disclosure of impairment of assets [Abstract] |
Disclosure of detailed information about property, plant and equipment | Estimated remaining useful lives of the components of depreciable assets, categorized by asset class, are as follows:
Hydro generation | 1-48 years
Wind and Solar generation | 1-30 years
Gas generation | 1-33 years
Energy Transition | 1-9 years
Capital spares and other | 1-48 years
Year ended Dec. 31 |  |  | 2024 |  | 2023 | 2022
Segments: |  |  |  |  |  |
Hydro |  |  | — |  |  | (10) |  | 21 |
Wind and Solar |  |  | — |  |  | (4) |  | 43 |
Corporate |  |  | — |  |  | — |  | (2) |
Changes in decommissioning and restoration provisions on retired assets(1) |  |  | 24 |  |  | (34) |  | (53) |
Project development costs |  |  | 22 |  |  | — |  | — |
Asset impairment charges (reversals) |  |  | 46 |  |  | (48) |  | 9 |
(1)Changes relate to changes in discount rates and revisions in estimated decommissioning costs on retired assets in 2024, 2023 and 2022. Refer to Note 24 for further details. A reconciliation of the changes in the carrying amount of PP&E is as follows:
| Assets under construction | Land | Hydro | Wind and Solar | Gas generation | Energy Transition | Capital spares and other(1) | Total |
Cost |  |  |  |  |  |  |  |  |
As at Dec. 31, 2022 | 963 |  | 93 |  | 840 |  | 3,233 |  | 4,530 |  | 3,974 |  | 379 |  | 14,012 |  |
Additions(2) | 869 |  | — |  | — |  | — |  | — |  | — |  | 6 |  | 875 |  |
Disposals | — |  | (3) |  | — |  | — |  | — |  | (30) |  | — |  | (33) |  |
Impairment reversals (Note 7) | — |  | — |  | 10 |  | 4 |  | — |  | — |  | — |  | 14 |  |
Changes to decommissioning and restoration costs | — |  | — |  | 3 |  | 14 |  | (22) |  | 3 |  | (1) |  | (3) |  |
Retirement of assets | — |  | — |  | (7) |  | (18) |  | (124) |  | (7) |  | (108) |  | (264) |  |
Change in foreign exchange rates | (26) |  | — |  | — |  | (18) |  | (7) |  | (42) |  | (1) |  | (94) |  |
Transfers of assets(3) | (572) |  | — |  | 38 |  | 439 |  | 50 |  | 16 |  | 31 |  | 2 |  |
Transfers to finance lease receivable | — |  | — |  | — |  | (61) |  | (4) |  | — |  | — |  | (65) |  |
As at Dec. 31, 2023 | 1,234 |  | 90 |  | 884 |  | 3,593 |  | 4,423 |  | 3,914 |  | 306 |  | 14,444 |  |
Additions(2) | 279 |  | — |  | — |  | — |  | 10 |  | — |  | 22 |  | 311 |  |
Acquisitions (Note 4) | 11 |  | — |  | — |  | — |  | 401 |  | — |  | — |  | 412 |  |
Disposals | — |  | (2) |  | — |  | — |  | (1) |  | (3) |  | — |  | (6) |  |
Changes to decommissioning and restoration costs (Note 24) | — |  | — |  | 16 |  | 9 |  | 13 |  | — |  | — |  | 38 |  |
Retirement of assets | — |  | — |  | (10) |  | (12) |  | (16) |  | — |  | — |  | (38) |  |
Change in foreign exchange rates | 28 |  | 2 |  | — |  | 124 |  | — |  | 146 |  | 2 |  | 302 |  |
Transfer to intangible assets (Note 21) | — |  | — |  | — |  | — |  | (163) |  | — |  | — |  | (163) |  |
Transfers of assets(3) | (1,432) |  | — |  | 43 |  | 1,205 |  | 163 |  | 14 |  | 7 |  | — |  |
Transfers to finance lease receivable (Note 17) | — |  | — |  | — |  | — |  | (48) |  | — |  | — |  | (48) |  |
As at Dec. 31, 2024 | 120 |  | 90 |  | 933 |  | 4,919 |  | 4,782 |  | 4,071 |  | 337 |  | 15,252 |  |
Accumulated depreciation |  |  |  |  |  |  |  |  |
As at Dec. 31, 2022 | — |  | — |  | 478 |  | 1,228 |  | 2,812 |  | 3,744 |  | 194 |  | 8,456 |  |
Depreciation | — |  | — |  | 25 |  | 129 |  | 342 |  | 73 |  | 16 |  | 585 |  |
Retirement of assets | — |  | — |  | (4) |  | (15) |  | (101) |  | (7) |  | (108) |  | (235) |  |
Disposals | — |  | — |  | — |  | — |  | — |  | (30) |  | — |  | (30) |  |
Change in foreign exchange rates | — |  | — |  | — |  | (5) |  | (3) |  | (39) |  | — |  | (47) |  |
Transfers of assets(3) | — |  | — |  | — |  | — |  | (1) |  | 2 |  | — |  | 1 |  |
As at Dec. 31, 2023 | — |  | — |  | 499 |  | 1,337 |  | 3,049 |  | 3,743 |  | 102 |  | 8,730 |  |
Depreciation | — |  | — |  | 37 |  | 170 |  | 221 |  | 62 |  | 28 |  | 518 |  |
Retirement of assets | — |  | — |  | (9) |  | (9) |  | (15) |  | — |  | — |  | (33) |  |
Disposals | — |  | — |  | — |  | — |  | — |  | (2) |  | — |  | (2) |  |
Change in foreign exchange rates | — |  | — |  | — |  | 23 |  | 1 |  | 138 |  | — |  | 162 |  |
Transfer to intangible assets (Note 21) | — |  | — |  | — |  | — |  | (143) |  | — |  | — |  | (143) |  |
As at Dec. 31, 2024 | — |  | — |  | 527 |  | 1,521 |  | 3,113 |  | 3,941 |  | 130 |  | 9,232 |  |
Carrying amount |  |  |  |  |  |  |  |  |
As at Dec. 31, 2022 | 963 |  | 93 |  | 362 |  | 2,005 |  | 1,718 |  | 230 |  | 185 |  | 5,556 |  |
As at Dec. 31, 2023 | 1,234 |  | 90 |  | 385 |  | 2,256 |  | 1,374 |  | 171 |  | 204 |  | 5,714 |  |
As at Dec. 31, 2024 | 120 |  | 90 |  | 406 |  | 3,398 |  | 1,669 |  | 130 |  | 207 |  | 6,020 |  |
(1)Includes major spare parts and standby equipment available, but not in service. (2)In 2024, the Company capitalized $16 million (2023 — $57 million) of interest to PP&E at a weighted average rate of 6.52 per cent (2023 — 6.3 per cent). (3)Includes transfers of assets upon commissioning to assets in service and other movements.

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- Definition Disclosure of impairment of assets [Abstract] + References No definition available. + Details
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