Pensions and Other Postretirement Benefits (Pension Plans with ABO and PBO in Excess of Plan Assets) (Details) - Pension Plan [Member] - CAD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
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| Information for the pension plans with an accumulated benefit obligation in excess of plan assets [Abstract] | ||
| Accumulated benefit obligation | $ 543 | $ 542 |
| Fair value of plan assets | 199 | 111 |
| Information for the pension plans with a projected benefit obligation in excess of plan assets | ||
| Projected benefit obligation | 631 | 661 |
| Fair value of plan assets | $ 278 | $ 214 |
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- Definition Amount of plan asset for defined benefit pension plan with projected benefit obligation in excess of plan assets. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of projected benefit obligation for defined benefit pension plan with projected benefit obligation in excess of plan assets. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of plan asset for defined benefit plan with accumulated benefit obligation in excess of plan assets. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Details
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