v3.23.1
Segments - Major Customers by Reporting Segments (Details) - Revenues - Customer Concentration Risk
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Perfomex      
Revenue, Major Customer [Line Items]      
Percentage of contract revenues 14.00% 11.00% 9.00%
PTT Exploration and Production Public Company Limited      
Revenue, Major Customer [Line Items]      
Percentage of contract revenues 11.00% 24.00% 3.00%
Eni Congo S.A.      
Revenue, Major Customer [Line Items]      
Percentage of contract revenues 10.00% 0.00% 0.00%
CNOOC Petroleum Europe Limited      
Revenue, Major Customer [Line Items]      
Percentage of contract revenues 0.00% 16.00% 1.00%
ExxonMobil      
Revenue, Major Customer [Line Items]      
Percentage of contract revenues 0.00% 1.00% 18.00%
National Drilling Company (ADNOC)      
Revenue, Major Customer [Line Items]      
Percentage of contract revenues 0.00% 0.00% 11.00%
Centrica North Sea Limited (Spirit Energy)      
Revenue, Major Customer [Line Items]      
Percentage of contract revenues 0.00% 0.00% 10.00%
Total      
Revenue, Major Customer [Line Items]      
Percentage of contract revenues 35.00% 52.00% 52.00%