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Income taxes - Narrative (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Income Tax Disclosure [Line Items] |  |  |
Income tax provision based on ASML’s domestic rate | 25.80% | 25.80% | 25.80%
Effective income tax rate reconciliation (in percentage) | 17.70% | 18.60% | 15.80%
Current year tax (expense) / benefit | € 2,008.0 | € 1,535.6 | € 1,766.1
Unrecognized tax benefits, amount, excluding interest and penalties | 160.8 | 214.0 | € 193.6
Unrecognized tax benefits that would impact effective tax rate | 160.7 | 188.4 |
Balance of accrued interest and penalties | 13.7 | 39.1 |
Accrued interest and penalties | (22.0) | (17.7) |
Unrecognized temporary difference | 1,267.6 | 1,010.2 |
Global Minimum Tax |  |  |
Income Tax Disclosure [Line Items] |  |  |
Current year tax (expense) / benefit | 0.0 | € 2.5 |
With expiration date |  |  |
Income Tax Disclosure [Line Items] |  |  |
Carryforward losses | 212.6 |  |
No expiration date |  |  |
Income Tax Disclosure [Line Items] |  |  |
Tax credit carryforward amount | 232.7 |  |
Carryforward losses | 207.3 |  |
With expiration date |  |  |
Income Tax Disclosure [Line Items] |  |  |
Tax credit carryforward amount | € 79.4 |  |

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