Summary of Significant Accounting Policies - Reconciliation of Gross to Net Balances Expressed (Details) $ in Thousands	Dec. 31, 2025 USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amounts of Recognized Assets/(Liabilities)	$ 167
Net Amount of Asset/(Liabilities) Presented on the Consolidated Statement of Financial Condition	167
Net Amount	167
Bank of Nova Scotia
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amounts of Recognized Assets/(Liabilities)	385
Gross Amounts offset in the Consolidated Statement of Financial Condition	(218)
Net Amount of Asset/(Liabilities) Presented on the Consolidated Statement of Financial Condition	167
Net Amount	167
Bank of Nova Scotia Two
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amounts of Recognized Assets/(Liabilities)	(218)
Gross Amounts offset in the Consolidated Statement of Financial Condition	218
Net Amount	$ 136

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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