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Risk Management Activities - Maturity Analysis of Financial Liabilities (Details) - CAD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Accounts payable and accrued liabilities | $ 689 | $ 599
Borrowings | 3,267 | 3,361
Exchangeable securities | 735 | 730
Dividends payable | 62 | 59
Other |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 4 | $ 7
2022 |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Lease commitments for short-term leases for which recognition exemption has been used | 13 |
Gross carrying amount |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Accounts payable and accrued liabilities | 689 |
Borrowings | 3,198 |
Exchangeable securities | 750 |
Derivative financial assets | 8 |
Lease liabilities | 100 |
Interest expense on borrowings | 1,384 |
Dividends payable | 62 |
Liabilities | 6,050 |
Gross carrying amount | Debentures |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 251 |
Gross carrying amount | Senior notes |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 894 |
Gross carrying amount | Non-Recourse - Hydro |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 45 |
Gross carrying amount | Non-Recourse - Wind & Solar |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 752 |
Gross carrying amount | Non-Recourse - Gas |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 1,111 |
Gross carrying amount | Tax Equity Financing |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 141 |
Gross carrying amount | Other |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 4 |
Gross carrying amount | 7% Unsecured Subordinated Debentures Due May 1, 2039 |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Interest expense on borrowings | 168 |
Gross carrying amount | Commodity risk management |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities | (293) |
Gross carrying amount | 2022 |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Accounts payable and accrued liabilities | 689 |
Borrowings | 836 |
Exchangeable securities | 0 |
Derivative financial assets | 2 |
Lease liabilities | (6) |
Interest expense on borrowings | 149 |
Dividends payable | 62 |
Liabilities | 1,736 |
Gross carrying amount | 2022 | Debentures |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 0 |
Gross carrying amount | 2022 | Senior notes |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 511 |
Gross carrying amount | 2022 | Non-Recourse - Hydro |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 0 |
Gross carrying amount | 2022 | Non-Recourse - Wind & Solar |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 263 |
Gross carrying amount | 2022 | Non-Recourse - Gas |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 44 |
Gross carrying amount | 2022 | Tax Equity Financing |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 15 |
Gross carrying amount | 2022 | Other |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 3 |
Gross carrying amount | 2022 | 7% Unsecured Subordinated Debentures Due May 1, 2039 |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Interest expense on borrowings | 53 |
Gross carrying amount | 2022 | Commodity risk management |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities | (45) |
Gross carrying amount | 2023 |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Accounts payable and accrued liabilities | 0 |
Borrowings | 155 |
Exchangeable securities | 0 |
Derivative financial assets | 3 |
Lease liabilities | 4 |
Interest expense on borrowings | 120 |
Dividends payable | 0 |
Liabilities | 294 |
Gross carrying amount | 2023 | Debentures |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 0 |
Gross carrying amount | 2023 | Senior notes |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 0 |
Gross carrying amount | 2023 | Non-Recourse - Hydro |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 45 |
Gross carrying amount | 2023 | Non-Recourse - Wind & Solar |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 49 |
Gross carrying amount | 2023 | Non-Recourse - Gas |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 45 |
Gross carrying amount | 2023 | Tax Equity Financing |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 15 |
Gross carrying amount | 2023 | Other |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 1 |
Gross carrying amount | 2023 | 7% Unsecured Subordinated Debentures Due May 1, 2039 |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Interest expense on borrowings | 53 |
Gross carrying amount | 2023 | Commodity risk management |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities | (35) |
Gross carrying amount | 2024 |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Accounts payable and accrued liabilities | 0 |
Borrowings | 113 |
Exchangeable securities | 0 |
Derivative financial assets | 3 |
Lease liabilities | 3 |
Interest expense on borrowings | 115 |
Dividends payable | 0 |
Liabilities | 173 |
Gross carrying amount | 2024 | Debentures |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 0 |
Gross carrying amount | 2024 | Senior notes |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 0 |
Gross carrying amount | 2024 | Non-Recourse - Hydro |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 0 |
Gross carrying amount | 2024 | Non-Recourse - Wind & Solar |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 52 |
Gross carrying amount | 2024 | Non-Recourse - Gas |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 47 |
Gross carrying amount | 2024 | Tax Equity Financing |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 14 |
Gross carrying amount | 2024 | Other |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 0 |
Gross carrying amount | 2024 | 7% Unsecured Subordinated Debentures Due May 1, 2039 |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Interest expense on borrowings | 62 |
Gross carrying amount | 2024 | Commodity risk management |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities | (117) |
Gross carrying amount | 2025 |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Accounts payable and accrued liabilities | 0 |
Borrowings | 127 |
Exchangeable securities | 750 |
Derivative financial liabilities | 1 |
Lease liabilities | 3 |
Interest expense on borrowings | 109 |
Dividends payable | 0 |
Liabilities | 895 |
Gross carrying amount | 2025 | Debentures |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 0 |
Gross carrying amount | 2025 | Senior notes |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 0 |
Gross carrying amount | 2025 | Non-Recourse - Hydro |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 0 |
Gross carrying amount | 2025 | Non-Recourse - Wind & Solar |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 54 |
Gross carrying amount | 2025 | Non-Recourse - Gas |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 59 |
Gross carrying amount | 2025 | Tax Equity Financing |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 14 |
Gross carrying amount | 2025 | Other |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 0 |
Gross carrying amount | 2025 | 7% Unsecured Subordinated Debentures Due May 1, 2039 |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Interest expense on borrowings | 0 |
Gross carrying amount | 2025 | Commodity risk management |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities | (95) |
Gross carrying amount | 2026 |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Accounts payable and accrued liabilities | 0 |
Borrowings | 127 |
Exchangeable securities | 0 |
Derivative financial assets | 0 |
Lease liabilities | 3 |
Interest expense on borrowings | 104 |
Dividends payable | 0 |
Liabilities | 235 |
Gross carrying amount | 2026 | Debentures |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 0 |
Gross carrying amount | 2026 | Senior notes |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 0 |
Gross carrying amount | 2026 | Non-Recourse - Hydro |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 0 |
Gross carrying amount | 2026 | Non-Recourse - Wind & Solar |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 51 |
Gross carrying amount | 2026 | Non-Recourse - Gas |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 61 |
Gross carrying amount | 2026 | Tax Equity Financing |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 15 |
Gross carrying amount | 2026 | Other |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 0 |
Gross carrying amount | 2026 | 7% Unsecured Subordinated Debentures Due May 1, 2039 |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Interest expense on borrowings | 0 |
Gross carrying amount | 2026 | Commodity risk management |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial assets | (1) |
Gross carrying amount | More than five years |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Accounts payable and accrued liabilities | 0 |
Borrowings | 1,840 |
Exchangeable securities | 0 |
Derivative financial assets | 1 |
Lease liabilities | 93 |
Interest expense on borrowings | 787 |
Dividends payable | 0 |
Liabilities | 2,717 |
Gross carrying amount | More than five years | Debentures |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 251 |
Gross carrying amount | More than five years | Senior notes |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 383 |
Gross carrying amount | More than five years | Non-Recourse - Hydro |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 0 |
Gross carrying amount | More than five years | Non-Recourse - Wind & Solar |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 283 |
Gross carrying amount | More than five years | Non-Recourse - Gas |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 855 |
Gross carrying amount | More than five years | Tax Equity Financing |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 68 |
Gross carrying amount | More than five years | Other |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Borrowings | 0 |
Gross carrying amount | More than five years | 7% Unsecured Subordinated Debentures Due May 1, 2039 |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Interest expense on borrowings | 0 |
Gross carrying amount | More than five years | Commodity risk management |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities | $ (2) |

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