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Subsequent events (Details) - Investment in Van Lanschot Kempen | Jul. 24, 2025 | Mar. 01, 2025 | Feb. 28, 2025
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Disclosure of non-adjusting events after reporting period [line items] |  |  |
Percentage of ownership interest acquired |  | 7.20% |
Ownership interest held in equity based investments |  | 9.90% | 2.70%
Acquisition of investments |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |
Ownership interest held in equity based investments | 20.30% |  |

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition Percentage of Ownership Interest Acquired + References No definition available. + Details
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- Details
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- Details
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