Income taxes - Narrative (Details) - USD ($) $ in Millions |
12 Months Ended | |
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Dec. 31, 2025 |
Dec. 31, 2024 |
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| Effective Income Tax Rate Reconciliation [Line Items] | ||
| Proceeds from income tax refunds | $ 0.3 | $ 0.1 |
| Asset Management | ||
| Effective Income Tax Rate Reconciliation [Line Items] | ||
| Effective income tax rate reconciliation (as a percent) | 21.00% | 26.50% |
| Asset Management | United States | ||
| Effective Income Tax Rate Reconciliation [Line Items] | ||
| Effective income tax rate reconciliation (as a percent) | 21.00% | 21.00% |
| Asset Management | Canada | ||
| Effective Income Tax Rate Reconciliation [Line Items] | ||
| Effective income tax rate reconciliation (as a percent) | 26.50% | 26.50% |
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of income tax refund received from tax jurisdiction. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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