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Income taxes - Additional Information (Details) - Germany $ in Millions | Jul. 18, 2025 USD ($)
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Income taxes |
Effective income tax rate, before change in enacted rate | 15.00%
Effective income tax rate, reduction in enacted tax rate for each year, percentage | 1.00%
Effective Income Tax Rate, After Change In Enacted Rate | 10.00%
Deferred foreign income tax expense (benefit) | $ 19.3

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