v3.23.1
Newbuildings - Newbuildings Impairment (Details)
$ in Millions
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 27, 2022
USD ($)
rig
Dec. 31, 2022
USD ($)
rig
Jun. 30, 2022
USD ($)
rig
Dec. 31, 2022
USD ($)
rig
Sep. 30, 2022
rig
Jun. 30, 2022
USD ($)
rig
Dec. 31, 2022
USD ($)
rig
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Carrying Value Of New Buildings [Roll Forward]                  
Number of newbuild Jack-up rigs | rig 3         3      
Impairment charge               $ (124.4) $ 0.0
Carrying Value   $ 3.9   $ 3.9     $ 3.9 3.9 $ 3.7
Letter of intent                  
Carrying Value Of New Buildings [Roll Forward]                  
Number of newbuild Jack-up rigs | rig   3 3 3 3 3 3    
Three newbuildings considered in the LOI carrying value   $ 132.0   $ 132.0     $ 132.0 132.0  
Estimated cost to complete and respective onerous provision, net   312.4   312.4     312.4 312.4  
Total   444.4   444.4     444.4 444.4  
Newbuildings | Letter of intent                  
Carrying Value Of New Buildings [Roll Forward]                  
Potential sale price $ 320.0 320.0 $ 320.0 320.0   $ 320.0 320.0 320.0  
Impairment charge           $ (124.4)   (124.4)  
Carrying Value   $ 7.6   $ 7.6     $ 7.6 $ 7.6