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Derivative and Hedging Instruments - Hedges of Net Investments in Foreign Operations (Details) - Net investment hedges - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Disclosure of detailed information about hedging instruments [line items]
Change in value of the hedged item for ineffectiveness measurement	$ 620	$ (196)
Change in value of the hedging instrument for ineffectiveness measurement	(620)	196
Gains (losses) deferred in AOCI on derivatives	(620)	196
Gains (losses) reclassified from AOCI into Total investment result	0	0
Ineffectiveness recognized in Total investment result	0	0
Non-functional currency denominated debt
Disclosure of detailed information about hedging instruments [line items]
Change in value of the hedged item for ineffectiveness measurement	665	(195)
Change in value of the hedging instrument for ineffectiveness measurement	(665)	195
Gains (losses) deferred in AOCI on derivatives	(665)	195
Gains (losses) reclassified from AOCI into Total investment result	0	0
Ineffectiveness recognized in Total investment result	0	0
Forward contracts
Disclosure of detailed information about hedging instruments [line items]
Change in value of the hedged item for ineffectiveness measurement	(45)	(1)
Change in value of the hedging instrument for ineffectiveness measurement	45	1
Gains (losses) deferred in AOCI on derivatives	45	1
Gains (losses) reclassified from AOCI into Total investment result	0	0
Ineffectiveness recognized in Total investment result	$ 0	$ 0

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- Definition

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The gain (loss) on the change in fair value of the hedged item used as a basis for recognising hedge ineffectiveness. Hedge ineffectiveness is the extent to which the changes in the fair value or the cash flows of the hedging instrument are greater or less than those on the hedged item.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 24B
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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The gain (loss) on the change in fair value of the hedging instrument used as a basis for recognising hedge ineffectiveness. Hedge ineffectiveness is the extent to which the changes in the fair value or the cash flows of the hedging instrument are greater or less than those on the hedged item.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Number 7
-IssueDate 2024-01-01
-Paragraph 24A
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Gains (Losses) Deferred In Accumulated Other Comprehensive Income On Derivatives

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Gains (Losses) Reclassified From Accumulated Other Comprehensive Income Into Investment Income

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Ineffectiveness Recognized In Investment Result

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