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Risks - Foreign currency sensitivity (Details) - Currency risk [member] zł in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2025 EUR (€)	Dec. 31, 2025 USD ($)	Dec. 31, 2025 PLN (zł)	Dec. 31, 2024	Dec. 31, 2023
Disclosure of risk management strategy related to hedge accounting [line items]
Revenue derived from sales in currency different from euro	32.00%	32.00%	32.00%	36.00%	34.00%
Currency swap contract [member]
Disclosure of risk management strategy related to hedge accounting [line items]
Hedge agreements		$ 8.1	zł 2.0
United States of America, Dollars
Disclosure of risk management strategy related to hedge accounting [line items]
Appreciation in US Dollar	10.00%	10.00%	10.00%
Depreciation in US Dollar	10.00%	10.00%	10.00%
Increase (Decrease) in net results as a result of appreciation in US Dollar.	€ 500,000
Increase (Decrease) in net result as a result of depreciation in US Dollar	400,000
Amount Of Euro Per US Dollar	€ 1

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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.

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The amount of a hedging instrument, recognised as an asset. [Refer: Hedging instruments [domain]]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Increase Decrease In Profit Loss Financial Instrument Due To Reasonably Possible decrease In Designated Risk Component.

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