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Employee Future Benefits - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 age	Dec. 31, 2024	Dec. 31, 2024 Rate	Mar. 31, 2024 CAD ($)
Minimum
Disclosure of defined benefit plans [line items]
Employer contribution percentage		5.00%
Maximum
Disclosure of defined benefit plans [line items]
Employer contribution percentage		11.50%
Other Post-Employment Benefit Plans
Disclosure of defined benefit plans [line items]
Maximum age disabled and retired members eligible for benefits	65		65
Letter of credit | Registered Pension Plan
Disclosure of defined benefit plans [line items]
Bonds issued				$ 90
Surety Bonds | Registered Pension Plan
Disclosure of defined benefit plans [line items]
Bonds issued				$ 62

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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- Definition

The amount of the exposure to credit risk on loan commitments and financial guarantee contracts. [Refer: Loan commitments [member]; Financial guarantee contracts [member]; Credit risk [member]]

+ References

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-IssueDate 2024-01-01
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Defined Benefit Plan, Maximum Age Disabled and Retired Member Eligible For Benefits

+ References

No definition available.

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- Definition

Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent1

+ References

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- Details

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