Summary of significant accounting policies (Details)	12 Months Ended
Dec. 31, 2025 segment reportingUnit
Variable Interest Entity [Line Items]
Number of operating segments \| segment	2
RSU's
Variable Interest Entity [Line Items]
Vesting period	3 years
Vesting percent	33.33%
RSU's \| Tranche One
Variable Interest Entity [Line Items]
Vesting percent	33.00%
RSU's \| Tranche Two
Variable Interest Entity [Line Items]
Vesting percent	33.00%
RSU's \| Tranche Three
Variable Interest Entity [Line Items]
Vesting percent	33.00%
Minimum
Variable Interest Entity [Line Items]
Management fee, term	4 years
Maximum
Variable Interest Entity [Line Items]
Management fee, term	6 years
Insurance Solutions
Variable Interest Entity [Line Items]
Number of reporting units \| reportingUnit	2,000

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- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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- Definition

Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

+ References

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Percentage of vesting of award under share-based payment arrangement.

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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.

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