Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Fair value measurement - Summary of Valuation Inputs To The Fair Value of Purchase Options (Detail)

v3.23.1
Fair value measurement - Summary of Valuation Inputs To The Fair Value of Purchase Options (Detail)
Dec. 31, 2022
Dec. 15, 2022
EUR (€)
Jun. 07, 2022
EUR (€)
Mar. 16, 2022
EUR (€)
Spot price per share        
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]        
Unobservable input, assets   108 115  
Spot price per share | Purchase options | Mega-E        
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]        
Unobservable input, assets       437,000
Spot price per share | Purchase options | MOMA        
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]        
Unobservable input, assets     253  
Volatility        
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]        
Unobservable input, assets   0.2750 0.2750  
Volatility | Purchase options | Mega-E        
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]        
Unobservable input, assets       1.0000
Growth factor | Investments in equity securities        
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]        
Unobservable input, assets 0.030      
Discount rate | Bottom of range        
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]        
Unobservable input, assets   0.023 (0.001)  
Discount rate | Top of range        
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]        
Unobservable input, assets   0.025 0.007  
Discount rate | Investments in equity securities        
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]        
Unobservable input, assets 0.119