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Share-based compensation plans - Narrative (Details)	9 Months Ended
	Sep. 30, 2025
Time Based Vesting Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting period	6 years
Performance Shares Units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of employees award share pay out	0.00%
Performance Shares Units | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of employees award share pay out	200.00%

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Reward Rate Of Stock Appreciation Over Performance Period

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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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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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