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

Capital management - Summary of Covenant Rations and Target Drawdown Stop Conditions (Detail)

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Capital management - Summary of Covenant Rations and Target Drawdown Stop Conditions (Detail)
€ in Millions
 12 Months Ended
Dec. 31, 2023
EUR (€)
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June 30, 2023  
Capital Management [Line Items]  
Interest cover ratio (0.8)
EBITDA margin (4.30%)
EBITDA | € € (8.5)
Fast/ultra-fast charging equipment utilization rate (drawstop) 0.104
December 31, 2023  
Capital Management [Line Items]  
Interest cover ratio (0.9)
EBITDA margin (5.80%)
EBITDA | € € (11.6)
Fast/ultra-fast charging equipment utilization rate (drawstop) 0.115
June 30, 2024  
Capital Management [Line Items]  
Leverage ratio 33.9
Interest cover ratio 0.4
EBITDA margin 8.10%
EBITDA | € € 19.8
Fast/ultra-fast charging equipment utilization rate (drawstop) 0.127
December 31, 2024  
Capital Management [Line Items]  
Leverage ratio 5.4
Interest cover ratio 2.3
EBITDA margin 19.40%
EBITDA | € € 68.2
Fast/ultra-fast charging equipment utilization rate (drawstop) 0.129
June 30, 2025  
Capital Management [Line Items]  
Leverage ratio 3.2
Interest cover ratio 3.8
EBITDA margin 24.10%
EBITDA | € € 111.2
Fast/ultra-fast charging equipment utilization rate (drawstop) 0.142
December 31, 2025  
Capital Management [Line Items]  
Leverage ratio 2.2
Interest cover ratio 5.5
EBITDA margin 27.30%
EBITDA | € € 157.5
Fast/ultra-fast charging equipment utilization rate (drawstop) 0.155
June 30, 2026  
Capital Management [Line Items]  
Leverage ratio 2.2
Interest cover ratio 5.5
EBITDA margin 28.90%
EBITDA | € € 200.0
Fast/ultra-fast charging equipment utilization rate (drawstop) 0.166
December 31, 2026  
Capital Management [Line Items]  
Leverage ratio 2.2
Interest cover ratio 5.5
June 30, 2027  
Capital Management [Line Items]  
Interest cover ratio 5.5