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Defined Benefit Obligation and Other Long-Term Liabilities - Components of Defined Benefit Obligations and Other Long-term Liabilities (Details) - CAD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Subclassifications of assets, liabilities and equities [abstract]
Defined benefit obligation	$ 150	$ 228
Long-term incentive accruals	8	4
Retail power contract liability	126	0
Other	10	21
Total	$ 294	$ 253

X

- Definition

The amount of accruals classified as non-current. [Refer: Accruals]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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X

- Definition

The amount of non-current net defined benefit liability. [Refer: Net defined benefit liability]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The amount of non-current liabilities that the entity does not separately disclose in the same statement or note. [Refer: Non-current liabilities]

+ References

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- References

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- Definition

Non-current Defined Benefit Obligation And Other Long-term Liabilities

+ References

No definition available.

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- Definition

Retail Power Contract Liabilities, Non-current

+ References

No definition available.

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