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Newbuildings - Narrative (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 ($)
Dec. 31, 2021
USD ($)
Property, Plant and Equipment [Line Items]                  
Number of newbuild Jack-up rigs | rig 3         3      
Impairment of non-current assets               $ 124.4 $ 0.0
Keppel Delivery Financing                  
Property, Plant and Equipment [Line Items]                  
Final installment amount   $ 294.8   $ 294.8     $ 294.8 294.8 $ 448.2
Letter of intent                  
Property, Plant and Equipment [Line Items]                  
Number of newbuild Jack-up rigs | rig   3 3 3 3 3 3    
Letter of intent | Newbuildings                  
Property, Plant and Equipment [Line Items]                  
Potential sale price $ 320.0 $ 320.0 $ 320.0 $ 320.0   $ 320.0 $ 320.0 320.0  
Impairment of non-current assets           $ 124.4   $ 124.4  
Gain on disposals       $ 3.7