Debt (AR Securitization) (Details) - CAD ($) |
12 Months Ended | |||
|---|---|---|---|---|
Jan. 19, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Debt Disclosure [Abstract] | ||||
| Maximum cash proceeds from sale of accounts receivable to unrelated trust | $ 450,000,000 | |||
| Accounts receivable securitization borrowings | 0 | $ 0 | $ 0 | |
| Accounts Receivable Securitization [Roll Forward] | ||||
| Beginning of year | 0 | 0 | 200,000,000 | |
| Proceeds received | 0 | 0 | 450,000,000 | |
| Repayment | 0 | 0 | (650,000,000) | |
| End of year | $ 0 | $ 0 | $ 0 | |
| Subsequent Event [Member] | ||||
| Line of Credit Facility [Line Items] | ||||
| Extension term | 1 year | |||