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financial instruments - Contract assets (Details) - CAD ($) $ in Millions	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023
Credit risk
Contract assets	$ 862	$ 913	$ 939	$ 843	$ 867	$ 898
Cost/Gross amount
Credit risk
Contract assets	888		969
Allowance for doubtful accounts
Credit risk
Contract assets	(26)		(30)
The 12-month period ending one year hence
Credit risk
Contract assets	589		614
The 12-month period ending one year hence | Cost/Gross amount
Credit risk
Contract assets	607		634
The 12-month period ending one year hence | Allowance for doubtful accounts
Credit risk
Contract assets	(18)		(20)
The 12-month period ending two years hence
Credit risk
Contract assets	228		278
The 12-month period ending two years hence | Cost/Gross amount
Credit risk
Contract assets	235		287
The 12-month period ending two years hence | Allowance for doubtful accounts
Credit risk
Contract assets	(7)		(9)
Thereafter
Credit risk
Contract assets	45		47
Thereafter | Cost/Gross amount
Credit risk
Contract assets	46		48
Thereafter | Allowance for doubtful accounts
Credit risk
Contract assets	$ (1)		$ (1)

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- Definition

The amount of an entity’s right to consideration in exchange for goods or services that the entity has transferred to a customer, when that right is conditioned on something other than the passage of time (for example, the entity’s future performance).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2024-01-01
-Paragraph 105
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_105&doctype=Standard
-URIDate 2024-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2024-01-01
-Paragraph 116
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_116_a&doctype=Standard
-URIDate 2024-03-27

+ Details

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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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