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Finance receivables, net - Narrative (Details) - EUR (€)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Receivables [Abstract]      
Sales-type lease, selling profit € 186,400,000 € 114,300,000 € 460,900,000
Expected credit losses from finance receivables recorded € 0 € 0 € 0