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v3.25.3

Guarantees, Commitments and Pledged Assets - Additional information (Detail) - CAD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2018 | Oct. 31, 2025
Guarantees commitments and pledged assets [Line Items] |  |
Other executory contracts | $ 800 |
Executory contract period | 20 years |
Top of range [member] |  |
Guarantees commitments and pledged assets [Line Items] |  |
Liquidity facilities expiration period |  | 3 years

X
- Definition Executory contract period. + References No definition available. + Details
Name: | bns_ExecutoryContractPeriod
Namespace Prefix: | bns_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent guarantees commitments and pledged assets. + References No definition available. + Details
Name: | bns_GuaranteesCommitmentsAndPledgedAssetsLineItems
Namespace Prefix: | bns_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Liquidity facilities term. + References No definition available. + Details
Name: | bns_LiquidityFacilitiesTerm
Namespace Prefix: | bns_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Other executory contracts. + References No definition available. + Details
Name: | bns_OtherExecutoryContracts
Namespace Prefix: | bns_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |