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Acquisitions and Other - SLF of Canada UK Limited Disposition (Details) - CAD ($) $ in Millions		3 Months Ended		12 Months Ended
	Apr. 03, 2023	Jun. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Goodwill
Disclosure of detailed information about business combination [line items]
Impairment				$ 170
Sun Life UK | Disposal groups classified as held for sale
Disclosure of detailed information about business combination [line items]
Gain on disposition	$ 12	$ 12
Cash consideration	418
Less: Net assets	(359)
Less: Foreign currency translation, transaction costs, and other adjustments	$ (47)
Sun Life UK | Disposal groups classified as held for sale | Goodwill
Disclosure of detailed information about business combination [line items]
Impairment			$ 170	$ 170

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The gain (loss) recognised on the measurement to fair value less costs to sell or on the disposal of the assets or disposal group(s) constituting the discontinued operation. [Refer: Discontinued operations [member]]

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The amount of impairment loss recognised in profit or loss for intangible assets and goodwill. [Refer: Impairment loss recognised in profit or loss; Intangible assets and goodwill]

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