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Income and expenses - Contract balance additional information (Details) € in Thousands	12 Months Ended
	Dec. 31, 2025 EUR (€)
Contract Balances [Line Items]
Minimum term for maintenance contract	1 year
Minimum term for contracts with up-front fees	1 year
Revenue that was included in contract liability at beginning of period	€ 45,998
Minimum
Contract Balances [Line Items]
Revenue, remaining performance obligations recognition period	1 year
Maximum
Contract Balances [Line Items]
Revenue, remaining performance obligations recognition period	3 years

X

- References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2025-01-01
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-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 105
-Subparagraph b
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
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-IssueDate 2025-01-01
-Paragraph 105
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_105_b&doctype=Standard
-URIDate 2025-03-27

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- Definition

Contract Balances [Line Item]

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- Definition

Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

Represents the minimum term for contracts with up-front fees.

+ References

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- Definition

Represents the minimum term for maintenance contract.

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