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Share-based compensation - Fair Value Assumptions (Details) - € / shares | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Assumptions Calculation Fair Value of Shares [Line Items] |  |  |
Share price at grant date (in eur per share) | € 580.9 | € 707.1 | € 620.1
Vesting period | 2 years 8 months 12 days | 2 years 10 months 24 days | 2 years 10 months 24 days
Dividend yield (in percentage) | 0.90% | 0.70% | 0.90%
Eurozone |  |  |
Assumptions Calculation Fair Value of Shares [Line Items] |  |  |
Risk free interest rate (Eurozone) | 1.80% | 2.40% | 2.40%
US |  |  |
Assumptions Calculation Fair Value of Shares [Line Items] |  |  |
Risk free interest rate (in percentage) | 3.90% | 4.20% | 3.90%
Expected volatility ASML |  |  |
Assumptions Calculation Fair Value of Shares [Line Items] |  |  |
Expected volatility (in percentage) | 41.70% | 40.00% | 46.20%
Average volatility of the peer group |  |  |
Assumptions Calculation Fair Value of Shares [Line Items] |  |  |
Average volatility of the peer group (market practice) (in percentage) | 46.60% | 43.30% | 50.00%

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- Definition [Line Items] for Assumptions Calculation Fair Value of Shares [Table] + References No definition available. + Details
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- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumption, Risk-Free Interest Rate + References No definition available. + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Rate of weighted-average expected volatility for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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