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Income taxes - Reconciliation Between (Provision for) Benefit from Income Taxes (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Income before income taxes € 11,406.1 € 9,042.4 € 9,083.5
Income tax provision based on ASML’s domestic rate (2,942.8) (2,332.9) (2,343.5)
Effects of tax rates in foreign jurisdictions   26.6 14.7
Adjustments in respect of tax exempt income   0.9 1.4
Adjustments in respect of tax incentives 1,055.8 824.6 941.9
Other nontaxable or nondeductible items (14.8)    
Adjustments in respect of prior years’ current taxes   (211.2) 113.1
Adjustments in respect of prior years’ deferred taxes   93.1 (85.2)
Movements in the liability for unrecognized tax benefits (24.1) (66.8) (55.0)
Global Minimum Tax   (2.5) 0.0
Change in valuation allowance   (24.9) 3.0
Equity method investments   (41.6) (42.6)
Effect of change in tax rates   0.0 13.5
Other credits and non-taxable items 30.2 54.1 2.9
Provision for income taxes € (2,013.4) € (1,680.6) € (1,435.8)
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Income before income taxes 100.00% 100.00% 100.00%
Income tax provision based on ASML’s domestic rate 25.80% 25.80% 25.80%
Effects of tax rates in foreign jurisdictions   (0.30%) (0.20%)
Adjustments in respect of tax exempt income   0.00% 0.00%
Adjustments in respect of tax incentives (9.30%) (9.10%) (10.40%)
Other nontaxable or nondeductible items 0.10%    
Adjustments in respect of prior years’ current taxes   2.30% (1.20%)
Adjustments in respect of prior years’ deferred taxes   (1.00%) 0.90%
Movements in the liability for unrecognized tax benefits 0.20% 0.70% 0.60%
Global Minimum Tax   0.00% 0.00%
Change in valuation allowance   0.30% 0.00%
Equity method investments   0.50% 0.50%
Effect of change in tax rates   0.00% (0.10%)
Other credits and non-taxable items (0.30%) (0.60%) 0.00%
Provision for income taxes 17.70% 18.60% 15.80%
Other foreign jurisdictions      
Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Effects of tax rates in foreign jurisdictions € (117.7)    
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Effects of tax rates in foreign jurisdictions 1.00%