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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