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Property, Plant, and Equipment - Reconciliation of the Changes in the Carrying Amount of PP&E (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | $ 5,556 | $ 5,320
Disposals |  | 5
End of the period | 5,714 | 5,556
Other work performed by entity and capitalised | $ 57 | $ 16
Weighted average rate | 6.30% | 6.00%
Cost |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | $ 14,012 | $ 13,389
Additions | 875 | 897
Additions from development projects |  | 29
Disposals | 33 | 220
Impairment (charges) reversals | (14) | 62
Retirement of assets | 264 | 39
Change in foreign exchange rates | (94) | 153
Transfers to assets | 2 | (61)
Transfers to finance lease receivable | (65) |
End of the period | 14,444 | 14,012
Accumulated depreciation |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | (8,456) | (8,069)
Depreciation | 585 | 538
Disposals | (30) | (212)
Retirement of assets | (235) | (33)
Change in foreign exchange rates | (47) | 102
Transfers to assets |  | (8)
Transfers in (out) of PP&E | 1 |
End of the period | (8,730) | (8,456)
Assets under construction |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | 963 | 184
End of the period | 1,234 | 963
Assets under construction | Cost |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | 963 | 184
Additions | 869 | 891
Additions from development projects |  | 17
Disposals | 0 | 0
Impairment (charges) reversals | 0 | (2)
Retirement of assets | 0 | 0
Change in foreign exchange rates | (26) | 13
Transfers to assets | (572) | (144)
Transfers to finance lease receivable | 0 |
End of the period | 1,234 | 963
Assets under construction | Accumulated depreciation |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | 0 | 0
Depreciation | 0 | 0
Disposals | 0 | 0
Retirement of assets | 0 | 0
Change in foreign exchange rates | 0 | 0
Transfers to assets |  | 0
Transfers in (out) of PP&E | 0 |
End of the period | 0 | 0
Land |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | 93 | 96
End of the period | 90 | 93
Land | Cost |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | 93 | 96
Additions | 0 | 0
Additions from development projects |  | 0
Disposals | 3 | 3
Impairment (charges) reversals | 0 | 0
Retirement of assets | 0 | 0
Change in foreign exchange rates | 0 | 0
Transfers to assets | 0 | 0
Transfers to finance lease receivable | 0 |
End of the period | 90 | 93
Land | Accumulated depreciation |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | 0 | 0
Depreciation | 0 | 0
Disposals | 0 | 0
Retirement of assets | 0 | 0
Change in foreign exchange rates | 0 | 0
Transfers to assets |  | 0
Transfers in (out) of PP&E | 0 |
End of the period | 0 | 0
Hydro |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | 362 | 399
End of the period | 385 | 362
Hydro | Cost |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | 840 | 867
Additions | 0 | 0
Additions from development projects |  | 0
Disposals | 0 | 0
Impairment (charges) reversals | (10) | 21
Retirement of assets | 7 | 9
Change in foreign exchange rates | 0 | 0
Transfers to assets | 38 | 18
Transfers to finance lease receivable | 0 |
End of the period | 884 | 840
Hydro | Accumulated depreciation |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | (478) | (468)
Depreciation | 25 | 21
Disposals | 0 | 0
Retirement of assets | (4) | (8)
Change in foreign exchange rates | 0 | 0
Transfers to assets |  | (3)
Transfers in (out) of PP&E | 0 |
End of the period | (499) | (478)
Wind and Solar |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | 2,005 | 2,183
End of the period | 2,256 | 2,005
Wind and Solar | Cost |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | 3,233 | 3,276
Additions | 0 | 0
Additions from development projects |  | 0
Disposals | 0 | 0
Impairment (charges) reversals | (4) | 43
Retirement of assets | 18 | 9
Change in foreign exchange rates | (18) | 45
Transfers to assets | 439 | 23
Transfers to finance lease receivable | (61) |
End of the period | 3,593 | 3,233
Wind and Solar | Accumulated depreciation |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | (1,228) | (1,093)
Depreciation | 129 | 130
Disposals | 0 | 0
Retirement of assets | (15) | (6)
Change in foreign exchange rates | (5) | 11
Transfers to assets |  | 0
Transfers in (out) of PP&E | 0 |
End of the period | (1,337) | (1,228)
Gas generation |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | 1,718 | 1,909
End of the period | 1,374 | 1,718
Gas generation | Cost |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | 4,530 | 4,087
Additions | 0 | 0
Additions from development projects |  | 0
Disposals | 0 | 1
Impairment (charges) reversals | 0 | 0
Retirement of assets | 124 | 12
Change in foreign exchange rates | (7) | (4)
Transfers to assets | 50 | 472
Transfers to finance lease receivable | (4) |
End of the period | 4,423 | 4,530
Gas generation | Accumulated depreciation |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | (2,812) | (2,178)
Depreciation | 342 | 308
Disposals | 0 | (1)
Retirement of assets | (101) | (10)
Change in foreign exchange rates | (3) | 2
Transfers to assets |  | 335
Transfers in (out) of PP&E | (1) |
End of the period | (3,049) | (2,812)
Energy Transition |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | 230 | 363
End of the period | 171 | 230
Energy Transition | Cost |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | 3,974 | 4,513
Additions | 0 | 0
Additions from development projects |  | 0
Disposals | 30 | 216
Impairment (charges) reversals | 0 | 0
Retirement of assets | 7 | 7
Change in foreign exchange rates | (42) | 97
Transfers to assets | 16 | (423)
Transfers to finance lease receivable | 0 |
End of the period | 3,914 | 3,974
Energy Transition | Accumulated depreciation |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | (3,744) | (4,150)
Depreciation | 73 | 63
Disposals | (30) | (211)
Retirement of assets | (7) | (7)
Change in foreign exchange rates | (39) | 89
Transfers to assets |  | (340)
Transfers in (out) of PP&E | 2 |
End of the period | (3,743) | (3,744)
Capital spares and other |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | 185 | 186
End of the period | 204 | 185
Capital spares and other | Cost |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | 379 | 366
Additions | 6 | 6
Additions from development projects |  | 12
Disposals | 0 | 0
Impairment (charges) reversals | 0 | 0
Retirement of assets | 108 | 2
Change in foreign exchange rates | (1) | 2
Transfers to assets | 31 | (7)
Transfers to finance lease receivable | 0 |
End of the period | 306 | 379
Capital spares and other | Accumulated depreciation |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning of the period | (194) | (180)
Depreciation | 16 | 16
Disposals | 0 | 0
Retirement of assets | (108) | (2)
Change in foreign exchange rates | 0 | 0
Transfers to assets |  | 0
Transfers in (out) of PP&E | 0 |
End of the period | (102) | (194)
Decommissioning and restoration |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Disposals |  | 5
Decommissioning and restoration | Cost |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Revisions/additions to decommissioning and restoration costs | (3) | (74)
Decommissioning and restoration | Assets under construction | Cost |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Revisions/additions to decommissioning and restoration costs | 0 | 0
Decommissioning and restoration | Land | Cost |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Revisions/additions to decommissioning and restoration costs | 0 | 0
Decommissioning and restoration | Hydro | Cost |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Revisions/additions to decommissioning and restoration costs | 3 | (15)
Decommissioning and restoration | Wind and Solar | Cost |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Revisions/additions to decommissioning and restoration costs | 14 | (59)
Decommissioning and restoration | Gas generation | Cost |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Revisions/additions to decommissioning and restoration costs | (22) | (12)
Decommissioning and restoration | Energy Transition | Cost |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Revisions/additions to decommissioning and restoration costs | 3 | 10
Decommissioning and restoration | Capital spares and other | Cost |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Revisions/additions to decommissioning and restoration costs | $ (1) | $ 2

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