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Total Invested Assets and Related Net Investment Income - Hedge Ineffectiveness (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of detailed information about financial instruments [line items]
Accumulated other comprehensive income	$ 772	$ 714	$ 872
Unrealized gains (losses)	(11)	42
Losses (gains) reclassified to Net interest income	(28)	53
Foreign exchange risk
Disclosure of detailed information about financial instruments [line items]
Gains (losses) on hedged items for ineffectiveness measurement	18	10
Gain (losses) on hedging instruments for ineffectiveness measurement	(18)	(10)
Hedge ineffectiveness	0	0
Unrealized gains (losses)	(17)	44
Losses (gains) reclassified to Net interest income	37	(51)
Equity price risk
Disclosure of detailed information about financial instruments [line items]
Gains (losses) on hedged items for ineffectiveness measurement	(6)	(6)
Gain (losses) on hedging instruments for ineffectiveness measurement	17	7
Hedge ineffectiveness	11	1
Unrealized gains (losses)	7	(8)
Losses (gains) reclassified to Net interest income	(3)	(2)
Active hedges | Foreign exchange risk
Disclosure of detailed information about financial instruments [line items]
Accumulated other comprehensive income	9	(6)
Active hedges | Equity price risk
Disclosure of detailed information about financial instruments [line items]
Accumulated other comprehensive income	(10)	(12)
Discontinued hedges | Foreign exchange risk
Disclosure of detailed information about financial instruments [line items]
Accumulated other comprehensive income	0	0
Discontinued hedges | Equity price risk
Disclosure of detailed information about financial instruments [line items]
Accumulated other comprehensive income	$ 0	$ 0

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The amount of accumulated items of income and expense (including reclassification adjustments) that are not recognised in profit or loss as required or permitted by other IFRSs. [Refer: IFRSs [member]; Other comprehensive income]

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The gain (loss) on 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.

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The gains (losses) recognised in other comprehensive income on cash flow hedges, net of tax, before reclassification adjustments. [Refer: Cash flow hedges [member]]

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