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Investments - Results of operations (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of subsidiaries [line items]
Revenues	$ 2,101	$ 2,347	$ 2,249
Equity income (Note 10)	1	$ 0	$ 0
Consolidated structured entities [member]
Disclosure of subsidiaries [line items]
Revenues	3
Operating expense	(2)
Equity income (Note 10)	$ 1

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

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The amount of all operating expenses.

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The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration.

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The entity's share of the profit (loss) of associates accounted for using the equity method. [Refer: Associates [member]; Investments accounted for using equity method; Profit (loss)]

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