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Credit Facilities, Long-Term Debt and Lease Liabilities - Senior Notes (Details) $ in Millions, $ in Millions | Dec. 31, 2023 CAD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 CAD ($) | Dec. 31, 2022 USD ($) | Nov. 17, 2022 USD ($) | Nov. 15, 2022 CAD ($)
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Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Cash drawings | $ 3,466 |  | $ 3,653 |  |  |
Interest rate swap contract [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Interest |  |  |  |  | 598.20% |
Long-term debt | Net investment hedges |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Notional amount |  | $ 370 |  | $ 370 |  |
7.750 Per cent Senior Notes Due Nov. 15, 2029 |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Cash drawings |  |  |  |  | $ 400 |
Interest |  |  |  |  | 775.00% |
4.5% Senior notes |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Cash drawings |  |  |  |  |  | $ 400
Interest | 4.50% | 4.50% |  |  |  |

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