XML 54 R40.htm IDEA: XBRL DOCUMENT v3.25.4
Description Of The Business And Summary Of Significant Accounting Policies (Narrative) (Details)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2025
USD ($)
floater
$ / shares
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
Dec. 31, 2023
USD ($)
shares
Feb. 19, 2026
jackup
floater
Apr. 30, 2021
$ / shares
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]          
Net foreign currency exchange gains (losses) | $ $ (14.3) $ 13.8 $ (3.5)    
Asset Impairment Charges | $ $ 27.3 $ 0.0 $ 0.0    
Class of Warrant or Right, Outstanding | shares 5,470,801        
Common Stock, Par or Stated Value Per Share | $ / shares $ 0.01 $ 0.01      
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares         $ 131.88
Antidilutive share options excluded from computation of diluted earnings per share | shares 217,000 160,000 147,000    
Subsequent Event          
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]          
Number of contract drilling rigs       46  
Drilling rigs and equipment [Member] | Minimum          
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]          
Property, Plant and Equipment, Useful Life 3 years        
Drilling rigs and equipment [Member] | Maximum          
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]          
Property, Plant and Equipment, Useful Life 35 years        
Building and Building Improvements [Member] | Minimum          
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]          
Property, Plant and Equipment, Useful Life 10 years        
Building and Building Improvements [Member] | Maximum          
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]          
Property, Plant and Equipment, Useful Life 30 years        
Equipment [Member] | Minimum          
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]          
Property, Plant and Equipment, Useful Life 2 years        
Equipment [Member] | Maximum          
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]          
Property, Plant and Equipment, Useful Life 6 years        
Floaters [Member] | Ultra Deepwater Drillships [Member]          
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]          
Number of contract drilling rigs 13        
Floaters [Member] | Dynamically Positioned Semisubmersible [Member]          
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]          
Number of contract drilling rigs 2        
Jackups [Member] | Subsequent Event          
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]          
Number of contract drilling rigs | jackup       31  
ARO | Subsequent Event          
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]          
Number of contract drilling rigs       9