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Share-Based Payments - Share-Based Payment Plans of MFS (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of terms and conditions of share-based payment arrangement [line items]
Compensation expense	$ 540	$ 549
MFS Investment Management Share-Based Awards
Disclosure of terms and conditions of share-based payment arrangement [line items]
Compensation expense	387	332
Income tax expense (benefit)	$ (64)	$ (58)

X

- Definition

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.

+ References

No definition available.

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- Definition

The amount of expense from share-based payment transactions with employees.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 112
-Subparagraph c
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-URIDate 2019-03-27

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- Definition

Tax Expense (Income) From Share-Based Payment Transactions With Employees

+ References

No definition available.

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