Commitments and contingencies (Details) € in Millions	Dec. 31, 2025 EUR (€)
Recorded Unconditional Purchase Obligation [Line Items]
Total contractual obligations	€ 17,600.0
1 year	11,400.0
2 years	2,600.0
3 years	1,000.0
4 years	900.0
5 years	900.0
>5 years	800.0
Debt
Recorded Unconditional Purchase Obligation [Line Items]
Total contractual obligations	4,600.0
1 year	1,700.0
2 years	800.0
3 years	0.0
4 years	800.0
5 years	800.0
>5 years	500.0
Lease obligations
Recorded Unconditional Purchase Obligation [Line Items]
Total contractual obligations	300.0
1 year	100.0
2 years	100.0
3 years	0.0
4 years	0.0
5 years	0.0
>5 years	100.0
Purchase obligations
Recorded Unconditional Purchase Obligation [Line Items]
Total contractual obligations	12,700.0
1 year	9,600.0
2 years	1,700.0
3 years	1,000.0
4 years	100.0
5 years	100.0
>5 years	€ 200.0

Amount of contractual obligation, including, but not limited to, long-term debt, lease obligation, purchase obligation, and other commitments.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3

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Amount of contractual obligation to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of contractual obligation to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of contractual obligation to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 440
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482648/440-10-50-6

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