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Property Plant and Equipment - Additional Information (Details)
$ in Millions
 6 Months Ended 12 Months Ended 32 Months Ended
Dec. 31, 2023
item
Dec. 31, 2024
EUR (€)
item
Dec. 31, 2023
EUR (€)
item
Dec. 31, 2022
EUR (€)
Dec. 31, 2021
EUR (€)
Dec. 31, 2024
EUR (€)
Dec. 31, 2024
USD ($)
Property, Plant and Equipment              
Borrowing costs capitalized   € 19,700,000 € 7,100,000 € 4,200,000      
Capitalization rate (in percent)   7.60% 5.50% 5.70%      
Percentage considered for third valuation in case the valuation differs   10.00%          
Down payments on Vessels   € 615,542,000 € 66,899,000 € 224,606,000      
Number of vessels evaluated for impairment | item   2          
Impairment of property, plant and equipment   € 0 (5,000,000)        
Additions For Guarantee Fees Related To Class And P Class Newbuild Vessels   7,600,000          
Eneti Inc              
Property, Plant and Equipment              
Acquisition of businesses   441,500,000          
Assets under construction              
Property, Plant and Equipment              
Transfer from assets under construction     (11,000,000)        
Assets under construction | Eneti Inc              
Property, Plant and Equipment              
Acquisition of businesses   144,000,000          
P-Class vessels              
Property, Plant and Equipment              
Additions   42,000,000          
Additions for down payments made for installation of vessels   290,000,000 15,400,000        
Down payments on Vessels   245,000,000 14,000,000   € 137,000,000    
A-Class vessels              
Property, Plant and Equipment              
Additions   3,800,000 € 167,000,000        
Additions for down payments made for installation of vessels   114,000,000          
Down payments on Vessels   94,000,000   167,000,000   € 299,000,000 $ 794
Number Of Vessels For Which Down Payments Have Been Made For Installation | item     2        
M-Class vessels              
Property, Plant and Equipment              
Additions for down payments made for installation of vessels   103,000,000          
Down payments on Vessels   91,700,000 € 29,300,000 € 59,400,000 € 29,600,000    
O-class vessels              
Property, Plant and Equipment              
Additions for down payments made for installation of vessels   62,000,000          
Number Of Vessels For Which Independent Evaluation Was Conducted | item 2            
Wind Orca              
Property, Plant and Equipment              
Additions   16,000,000 10,700,000        
Wind Osprey              
Property, Plant and Equipment              
Additions   6,800,000 16,300,000        
Assets related to future projects.              
Property, Plant and Equipment              
Additions   5,700,000          
Vessels              
Property, Plant and Equipment              
Additions for down payments made for installation of vessels   € 54,000,000          
Transfer from assets under construction     € 9,000,000        
Growth rate used to extrapolate cash flow projections   2.50%       2.50% 2.50%
Vessels | Weighted Average Cost Of Capital (WACC)              
Property, Plant and Equipment              
Percentage of reasonably possible increase in unobservable input, assets   1.00%       1.00% 1.00%
Percentage of reasonably possible decrease in unobservable input, assets   1.00%       1.00% 1.00%
Significant unobservable input, assets 9.5 9.5 9.5 8   9.5 9.5
Amount Of Reasonable Possible Decrease In Revenue Per Day Following Decrease In WACC   € 20,000          
Amount Of Reasonable Possible Increase In Revenue Per Day Following Increase In WACC   20,000          
Operating Vessels Wind Scylla              
Property, Plant and Equipment              
Acquisition of businesses   206,000          
Wind Zaratan              
Property, Plant and Equipment              
Acquisition of businesses   € 87,000