Quarterly report pursuant to Section 13 or 15(d)

Revenue (Narrative) (Details)

v3.22.1
Revenue (Narrative) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2022
Jun. 20, 2026
Dec. 31, 2021
Feb. 25, 2021
Feb. 24, 2021
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Foreign income taxes receivable $ 8.8        
Foreign taxes payable attributable to sharing obligation     $ 3.1    
Prior Production Sharing Contract, Through September 17, 2018 [Member] | Government Of Gabon [Member]          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Monthly royalty rate, based on production at the published price 13.00%        
Production Sharing Contract, September 17, 2018 Through September 16, 2028 [Member]          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Purchase agreement payment period 30 days        
Production Sharing Contract, September 17, 2018 Through September 16, 2028 [Member] | Government Of Gabon [Member]          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Monthly royalty rate, based on production at the published price 13.00%        
Etame Marine Block [Member]          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Working interest ownership, percentage       58.80% 31.10%
Etame Marine Block [Member] | Prior Production Sharing Contract, Through September 17, 2018 [Member] | Consortium [Member]          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Working interest ownership, percentage 7.50%        
Etame Marine Block [Member] | Production Sharing Contract, September 17, 2018 Through September 16, 2028 [Member] | Government Of Gabon [Member]          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Working interest ownership, percentage 7.50%        
Etame Marine Block [Member] | Scenario, Forecast [Member] | Production Sharing Contract, September 17, 2018 Through September 16, 2028 [Member] | Government Of Gabon [Member]          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Working interest ownership, percentage   10.00%