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v3.25.4

Employee benefits - Narrative (Details) | 12 Months Ended
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Dec. 31, 2025 EUR (€) Person Company Plan Rate | Dec. 31, 2024 EUR (€) Rate | Dec. 31, 2023 EUR (€) Rate
Defined Benefit Plan Disclosure [Line Items] |  |  |
Number of plans | Plan | 1 |  |
Multiemployer plan and defined contribution costs, employer contribution, accrued premium | € 75,800,000 | € 75,900,000 |
Cymer compensation plan deferral period | 3 years |  |
Cymer compensation plan expenses | € 0 | 0 | € 0
Deferred compensation plan liability | 127,700,000 | 111,800,000 |
Compensation plan assets | € 129,900,000 | € 113,100,000 |
Netherlands multi-employer union plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Number of full time equivalent employees in multiemployer union plans | Person | 23,711 |  |
Number of full time equivalent employees in multiemployer union plans (in percentage) | 54.50% |  |
Number of companies covered by multiemployer plan | Company | 1,618 |  |
Number of employees covered | Person | 184,847 |  |
Employer contributions percentage | Rate | 28.00% | 28.00% | 28.00%
Employer contribution under CBA, percentage | Rate | 19.50% | 18.20% | 18.30%
Multi-employer union plan expected contribution | € 437,000,000.0 |  |
Minimal coverage ratio (in percentage) | 1.043 | 1.043 |
Multiemployer plan coverage ratio | Rate | 125.30% | 113.10% |
Netherlands multi-employer union plan | Maximum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Multiemployer plan coverage ratio | Rate | 118.10% |  |

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- Definition In July 2002, we adopted a non-qualified deferred compensation plan for our US employees that allows a select group of management or highly compensated employees to defer a portion of their salary, bonus, and commissions. The plan allows us to credit additional amounts to the participants’ account balances. The participants divide their funds among the investments available in the plan. Participants elect to receive their funds in future periods after the earlier of their employment termination or their withdrawal election, at least 3 years after deferral. + References No definition available. + Details
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- Definition Number of Dutch full time equivalent payroll employees in multi-employer union plan. + References No definition available. + Details
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- Definition The compensation expense recognized during the period pertaining to the deferred compensation arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 710 -SubTopic 10 -Name Accounting Standards Codification -Section 30 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483043/710-10-30-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-1 + Details
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- Definition Percentage of entity's employees covered by collective-bargaining arrangement (CBA) to all entity's employees in multiemployer pension plan determined to be individually significant. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 80 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480576/715-80-50-5 + Details
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- Definition Percentage of employer contribution required by collective-bargaining arrangement (CBA) to total employer contribution required by all its CBAs for multiemployer pension plan determined to be individually significant. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 80 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480576/715-80-50-5 + Details
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- Definition Percentage of employer contribution required by collective-bargaining arrangement (CBA) to total contribution from all participating employers in multiemployer pension plan determined to be individually significant. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 80 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480576/715-80-50-5 + Details
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- Definition Amount of cost for employer contribution required to be made in future period to multiemployer pension plan determined to be individually significant. Includes, but is not limited to, employer contribution required by collective-bargaining arrangement (CBA), statutory obligation, and other contractual obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 80 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480576/715-80-50-5 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 80 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480547/715-80-55-8 + Details
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