Segment disclosure - Narrative (Details) € in Millions	12 Months Ended
Dec. 31, 2024 EUR (€) Segment customer	Dec. 31, 2023 EUR (€) customer	Dec. 31, 2022 EUR (€) customer
Segment Reporting Information [Line Items]
Number of reportable segments \| Segment	1
Total net sales	€ 28,262.9	€ 27,558.5	€ 21,173.4
Number of largest customers \| customer	3
Accounts receivables and finance receivables of three largest customers based on net sales	€ 2,600.0	€ 3,700.0	€ 5,300.0
Accounts receivables and finance receivables of three largest customers based on net sales, percentage	54.10%	64.40%	78.60%
Increase in net system sales	€ 700.0
Increase in net system sales in percentage	2.60%
Revenue benchmark \| Customer concentration risk
Segment Reporting Information [Line Items]
Number of largest customers \| customer	4	2	2
Total net sales	€ 15,200.0	€ 14,900.0	€ 11,800.0
Revenue benchmark \| Customer concentration risk \| Three customers
Segment Reporting Information [Line Items]
Net sales revenue from largest customer as percentage	53.80%
Revenue benchmark \| Customer concentration risk \| Two customers
Segment Reporting Information [Line Items]
Net sales revenue from largest customer as percentage		53.90%	55.80%

Accounts Receivables And Finance Receivables Of Three Largest Customers Based On Net Sales

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Entity Wide Revenue Major Customer Accounts Receivables And Finance Receivable Percentage

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Increase (Decrease) in net system sales in percentage.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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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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