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Property Plant and Equipment - Additional Information (Details)
€ in Thousands, $ in Millions
1 Months Ended 6 Months Ended 12 Months Ended
Nov. 30, 2023
EUR (€)
item
Dec. 31, 2023
EUR (€)
item
Dec. 31, 2024
Dec. 31, 2023
EUR (€)
item
Dec. 31, 2022
EUR (€)
item
Dec. 31, 2021
EUR (€)
item
Dec. 31, 2023
USD ($)
Nov. 30, 2023
USD ($)
Nov. 13, 2023
EUR (€)
Nov. 13, 2023
USD ($)
Nov. 09, 2023
EUR (€)
Nov. 09, 2023
USD ($)
Property Plant and Equipment                        
Borrowing costs capitalized       € 7,100 € 4,200              
Capitalization rate (in percent)       5.50% 5.70%              
Number of vessels evaluated for impairment | item       2                
Number of independent evaluations received for vessels evaluated for impairment | item   2                    
Estimated market value of vessels                 € 313,000 $ 332    
Percentage by which the estimated market value of vessels exceeds the carrying value                 34.00% 34.00%    
Eneti Inc                        
Property Plant and Equipment                        
Acquisition of businesses       € 441,500                
Minimum                        
Property Plant and Equipment                        
Estimated market value of vessels                     € 377,000 $ 400
Percentage by which the estimated market value of vessels exceeds the carrying value                     67.00% 67.00%
Maximum                        
Property Plant and Equipment                        
Estimated market value of vessels                     € 415,000 $ 440
Percentage by which the estimated market value of vessels exceeds the carrying value                     84.00% 84.00%
Assets under Construction                        
Property Plant and Equipment                        
Additions for down payments made for installation of vessels and main crane installments       42,000 € 11,000              
Additions for down payments made for installation of vessels         9,000              
Assets related to future projects that have not yet started   € 5,700   5,700                
Assets under Construction | Eneti Inc                        
Property Plant and Equipment                        
Acquisition of businesses       144,000                
Assets under Construction | BW Group                        
Property Plant and Equipment                        
Guarantee fees   € 7,600   7,600                
P-Class vessels                        
Property Plant and Equipment                        
Additions for down payments made for installation of vessels       15,400   € 137,000            
Number of vessels for which down payments have been made for installation | item           2            
A-Class vessels                        
Property Plant and Equipment                        
Additions for down payments made for installation of vessels       3,800 € 167,000              
Number of vessels for which down payments have been made for installation | item         2              
O-class vessels                        
Property Plant and Equipment                        
Number of independent evaluations received for vessels evaluated for impairment | item   2                    
Wind Orca                        
Property Plant and Equipment                        
Additions for instalments made for the main cranes       16,000 € 10,700 € 7,000            
Wind Osprey                        
Property Plant and Equipment                        
Additions for instalments made for the main cranes       6,800 € 16,300              
Operating Vessels Wind Scylla                        
Property Plant and Equipment                        
Acquisition of businesses       205,879                
Number of independent evaluations received for vessels evaluated for impairment | item 2                      
Operating Vessels Wind Scylla | Clarksons                        
Property Plant and Equipment                        
Percentage by which the estimated market value of vessels exceeds the carrying value 5.00%             5.00%        
Operating Vessels Wind Scylla | Minimum | Clarksons                        
Property Plant and Equipment                        
Estimated market value of vessels € 203,000             $ 225        
Operating Vessels Wind Scylla | Minimum | Evaluation by Pareto                        
Property Plant and Equipment                        
Estimated market value of vessels € 258,000             $ 285        
Percentage by which the estimated market value of vessels exceeds the carrying value 25.00%             25.00%        
Operating Vessels Wind Scylla | Maximum | Clarksons                        
Property Plant and Equipment                        
Estimated market value of vessels € 217,000             $ 240        
Operating Vessels Wind Scylla | Maximum | Evaluation by Pareto                        
Property Plant and Equipment                        
Estimated market value of vessels € 267,000             $ 295        
Percentage by which the estimated market value of vessels exceeds the carrying value 29.00%             29.00%        
Wind Zaratan                        
Property Plant and Equipment                        
Acquisition of businesses       € 86,927                
Number of independent evaluations received for vessels evaluated for impairment | item   2                    
Wind Zaratan | Clarksons                        
Property Plant and Equipment                        
Percentage by which the estimated market value of vessels exceeds the carrying value   21.00%   21.00%     21.00%          
Wind Zaratan | Evaluation by Pareto                        
Property Plant and Equipment                        
Percentage by which the estimated market value of vessels exceeds the carrying value   10.00%   10.00%     10.00%          
Wind Zaratan | Minimum | Clarksons                        
Property Plant and Equipment                        
Estimated market value of vessels   € 86,000   € 86,000     $ 95          
Wind Zaratan | Minimum | Evaluation by Pareto                        
Property Plant and Equipment                        
Estimated market value of vessels   86,000   86,000     95          
Wind Zaratan | Maximum | Clarksons                        
Property Plant and Equipment                        
Estimated market value of vessels   104,000   104,000     115          
Wind Zaratan | Maximum | Evaluation by Pareto                        
Property Plant and Equipment                        
Estimated market value of vessels   € 95,000   € 95,000     $ 105          
value-in-use                        
Property Plant and Equipment                        
Percentage of yearly increase in revenue considered for determination of value in use     2.00%                  
WACC (in percent)   9.50%   9.50% 8.00% 8.50% 9.50%          
Percentage of reasonably possible increase (decrease) in WACC (in percent)   1.00%   1.00%     1.00%          
Reasonably possible increase (decrease) in revenue per day       € 20                
Newbuilds                        
Property Plant and Equipment                        
WACC (in percent)   9.50%   9.50% 8.00% 8.50% 9.50%          
Percentage of reasonably possible increase (decrease) in WACC (in percent)   1.00%   1.00%     1.00%          
Reasonably possible increase (decrease) in revenue per day       € 20