v3.26.1
Debt - Facility (Details)
1 Months Ended 3 Months Ended
Apr. 30, 2024
Mar. 31, 2026
USD ($)
Oct. 01, 2026
Sep. 30, 2026
Jun. 30, 2026
USD ($)
Apr. 30, 2026
USD ($)
Feb. 28, 2026
assessment
Dec. 31, 2025
USD ($)
Sep. 30, 2025
Jul. 31, 2025
assessment
Sep. 30, 2024
Mar. 31, 2024
Oct. 31, 2021
Mar. 31, 2021
Debt Instrument [Line Items]                            
Total long-term debt   $ 2,946,876,000           $ 3,100,274,000            
Facility                            
Debt Instrument [Line Items]                            
Debt cover ratio 2.50 2.50                        
Number of covenant assessment dates | assessment             2     2        
Facility | Facility, July 2025 Amendment                            
Debt Instrument [Line Items]                            
Debt cover ratio   4.25             4.0          
Facility | Facility, February 2026 Amendment, Excluding Mauritania And Senegal Business Units                            
Debt Instrument [Line Items]                            
Debt cover ratio   4.5                        
Facility | Forecast | Facility, July 2025 Amendment                            
Debt Instrument [Line Items]                            
Debt cover ratio       3.50                    
Facility | Forecast | Facility, February 2026 Amendment                            
Debt Instrument [Line Items]                            
Debt cover ratio     3.5 4.25                    
Facility | Revolving Credit Facility                            
Debt Instrument [Line Items]                            
Undrawn availability   $ 350,000,000.0                        
Total long-term debt   1,000,000,000.0                        
Interval period for payment of interest (in months) 6 months                          
Commitment fees percentage 30.00%                          
Unavailable capacity commitment fee percentage 20.00%                          
Facility | Revolving Credit Facility | Subsequent Event                            
Debt Instrument [Line Items]                            
Maximum borrowing capacity           $ 1,250,000,000                
Facility | Revolving Credit Facility | Forecast                            
Debt Instrument [Line Items]                            
Maximum borrowing capacity         $ 1,200,000,000                  
Facility | Revolving Credit Facility | Minimum                            
Debt Instrument [Line Items]                            
Applicable margin (as a percent) 4.00%                          
Facility | Revolving Credit Facility | Maximum                            
Debt Instrument [Line Items]                            
Applicable margin (as a percent) 5.50%                          
Facility | Letter of Credit                            
Debt Instrument [Line Items]                            
Letters of credit issued   0                        
Facility | Revolving Credit Facility                            
Debt Instrument [Line Items]                            
Total long-term debt   $ 1,000,000,000           1,200,000,000            
Facility Interest or Senior Notes                            
Debt Instrument [Line Items]                            
Period for contractual future interest payments   6 months                        
Restricted cash required   $ 47,000,000.0                        
7.750% Senior Notes | Senior Notes                            
Debt Instrument [Line Items]                            
Total long-term debt   100,173,000           350,000,000            
Interest rate (as a percent)                         7.75%  
7.500% Senior Notes | Senior Notes                            
Debt Instrument [Line Items]                            
Total long-term debt   400,274,000           400,274,000            
Interest rate (as a percent)                           7.50%
8.750% Senior Notes | Senior Notes                            
Debt Instrument [Line Items]                            
Total long-term debt   500,000,000           500,000,000            
Interest rate (as a percent)                     8.75%      
3.125% Convertible Senior Notes | Senior Notes                            
Debt Instrument [Line Items]                            
Total long-term debt   $ 400,000,000           $ 400,000,000            
Interest rate (as a percent)   3.125%           3.125%     3.125% 3.125%