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Other Assets - Disclosure of Change in Project Development Costs (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Change in Project Development Costs [Roll Forward]
Balance, Jan 1	$ 29	$ 25
Additions	29	15
Transfer of assets	(29)	(1)
Transfers to intangible assets	(19)	0
Impairment charges	0	(10)
Balance, Dec. 31	$ 10	$ 29

X

- Definition

The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Business combinations [member]; Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2022-03-24
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X

- Definition

The amount of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Impairment loss recognised in profit or loss; Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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-IssueDate 2022-03-24
-Paragraph 73
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X

- Definition

The increase (decrease) in intangible assets other than goodwill resulting from transfers. [Refer: Intangible assets other than goodwill]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 38
-IssueDate 2022-03-24
-Paragraph 118
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2022-en-r&anchor=para_118_e&doctype=Standard
-URIDate 2022-03-24

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X

- Definition

The increase (decrease) in property, plant and equipment resulting from transfers. [Refer: Property, plant and equipment]

+ References

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-Name IAS
-Number 16
-IssueDate 2022-03-24
-Paragraph 73
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2022-en-r&anchor=para_73_e&doctype=Standard
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X

- Definition

Change in Project Development Costs

+ References

No definition available.

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X

- Definition

Project Development Costs, Non-current

+ References

No definition available.

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Balance Type:	debit
Period Type:	instant