v3.23.1
Equity Method Investments - Narrative (Details)
$ in Millions
2 Months Ended 10 Months Ended 12 Months Ended
Aug. 04, 2021
USD ($)
Dec. 31, 2022
USD ($)
rig
Oct. 19, 2022
rig
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Equity Method Investment, Summarized Financial Information [Abstract]            
Interest in equity method investment not held by the company           51.00%
Proceeds from disposal of equity method investments       $ 0.0 $ 10.6 $ 0.0
Equity method investments   $ 20.6   20.6 19.4 62.7
Opex and Akal            
Equity Method Investment, Summarized Financial Information [Abstract]            
Funding provided by shareholder loans $ 5.4          
Opex            
Equity Method Investment, Summarized Financial Information [Abstract]            
Ownership percentage sold 49.00%          
Equity method investments   0.0   0.0 0.0 5.2
Akal            
Equity Method Investment, Summarized Financial Information [Abstract]            
Ownership percentage sold 49.00%          
Equity method investments   $ 0.0   0.0 0.0 $ 0.0
Perfomex and Perfomex II            
Equity Method Investment, Summarized Financial Information [Abstract]            
Percentage acquired share by the entity 51.00%         49.00%
Number of joint ventures for bareboat charters | rig     2      
Perfomex            
Equity Method Investment, Summarized Financial Information [Abstract]            
Number of rigs on bareboat charter | rig   5        
Ownership percentage sold 49.00%          
Additional ownership percentage acquired 2.00%          
Equity method investments   $ 16.9   16.9 16.9 $ 48.0
Funding provided by shareholder loans   9.8   9.8    
Opex and Akal            
Equity Method Investment, Summarized Financial Information [Abstract]            
Realized gain on disposal of investment $ 3.6          
Proceeds from disposal of equity method investments 10.6          
Equity method investments $ 7.0          
Perfomex II            
Equity Method Investment, Summarized Financial Information [Abstract]            
Ownership percentage sold 49.00%          
Additional ownership percentage acquired 2.00%          
Equity method investments   3.7   3.7 2.5 $ 9.5
Opex and Akal | Perfomex and Perfomex II            
Equity Method Investment, Summarized Financial Information [Abstract]            
Contracts receivable   113.9   113.9 86.8  
Billed contracts receivable   105.1   105.1 70.5  
Unbilled contracts receivable   $ 8.8   $ 8.8 $ 16.3  
Perfomex | Opex and Akal            
Equity Method Investment, Summarized Financial Information [Abstract]            
Contracts receivable $ 237.1          
Billed contracts receivable 113.7          
Unbilled contracts receivable $ 123.4          
Borr Mexico Ventures Limited | Opex            
Equity Method Investment, Summarized Financial Information [Abstract]            
Percentage acquired share by the entity           49.00%
Borr Mexico Ventures Limited | Akal            
Equity Method Investment, Summarized Financial Information [Abstract]            
Percentage acquired share by the entity           49.00%