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Equity Method Investment in ARO Equity Method Investment In ARO Narrative (Details)
$ in Millions
 3 Months Ended 4 Months Ended 8 Months Ended 12 Months Ended
Sep. 30, 2023
USD ($)
Apr. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2023
USD ($)
rigs
Dec. 31, 2022
USD ($)
Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]            
Total number of contract drilling rigs       53    
Number of jackups leased by ARO       8    
Contract terms on purchased rigs       15 years    
Order Period           10 years
Minimum renewal contract terms for newbuild rigs       8 years    
Shareholder Notes Payable, Term       10 years    
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate            
Schedule of Equity Method Investments [Line Items]            
Basis spread on variable rate       2.10%    
ARO            
Schedule of Equity Method Investments [Line Items]            
Total number of contract drilling rigs       8    
Number of newbuild jackup rigs       2    
ARO | Asset under Construction [Member]            
Schedule of Equity Method Investments [Line Items]            
Number of newbuild jackup rigs       1    
ARO | 10 years            
Schedule of Equity Method Investments [Line Items]            
Number of newbuild jackup rigs       20    
ARO            
Schedule of Equity Method Investments [Line Items]            
Equity Method Investment Summarized Financial Information Non Cash Interest Income | $ $ 14.8          
Early Repayment of Principal from Joint Venture Non Current | $ $ 40.0          
ARO            
Schedule of Equity Method Investments [Line Items]            
Lease Revenue From Related Party | $   $ 21.7 $ 35.4 $ 69.2 $ 56.7  
ARO            
Schedule of Equity Method Investments [Line Items]            
Ownership percentage       50.00%