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Consolidated shareholders' equity - Summary of Treasury Shares Held (Details) - shares shares in Thousands | Jun. 30, 2026 | Dec. 31, 2025 | Jun. 30, 2025 | Dec. 31, 2024
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Share Capital, Reserves And Other Equity Interest [Abstract] |  |  |  |
Number of shares (in shares) | 16,030 | 11,960 | 10,660 | 9,530
% of share capital for the period | 1.32% | 0.981% | 0.868% | 0.755%

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- Definition Number of shares held. + References No definition available. + Details
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- Definition Percentage of share capital for the period. + References No definition available. + Details
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- Definition Share Capital, Reserves And Other Equity Interest [Abstract] + References No definition available. + Details
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