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Equity method investments (Details) - EUR (€)
€ in Millions
12 Months Ended
Jun. 29, 2017
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]        
Profit (loss) from equity method investments   € 216.7 € 209.8 € 191.3
Cash received equity method investments   € 320.5 225.4 [1] € 218.0
Carl Zeiss SMT Holding GmbH & Co. KG        
Schedule of Equity Method Investments [Line Items]        
Weighted average useful life of finite-lived intangible assets acquired   11 years 1 month 6 days    
Equity method investment acquisition date Jun. 29, 2017      
Carl Zeiss SMT Holding GmbH & Co. KG | Carl Zeiss SMT Holding GmbH & Co. KG        
Schedule of Equity Method Investments [Line Items]        
Ownership percentage (in percentage)   24.90%    
Carl Zeiss SMT Holding GmbH & Co. KG | Share of net income (loss) after accounting policy alignment        
Schedule of Equity Method Investments [Line Items]        
Profit (loss) from equity method investments   € 322.8 216.4  
Carl Zeiss SMT Holding GmbH & Co. KG | Basis difference amortization        
Schedule of Equity Method Investments [Line Items]        
Profit (loss) from equity method investments   29.7 27.4  
Carl Zeiss SMT Holding GmbH & Co. KG | Intercompany profit elimination        
Schedule of Equity Method Investments [Line Items]        
Profit (loss) from equity method investments   € (76.4) € 20.8  
[1] Depreciation and amortization include depreciation of property, plant and equipment, amortization of intangible assets, and other (amortization
of underwriting commissions, amortization of discounts related to borrowings, credit facilities and accretion of loans issued at a discount).