v3.26.3
Revenues (Disaggregation) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Revenue        
Contract drilling revenues $ 937 $ 1,028 $ 2,984 $ 2,922
U.S.        
Revenue        
Contract drilling revenues 327 400 1,104 1,202
Brazil        
Revenue        
Contract drilling revenues 160 223 559 636
Norway        
Revenue        
Contract drilling revenues 185 177 541 476
Australia        
Revenue        
Contract drilling revenues 107 102 316 277
Other Countries        
Revenue        
Contract drilling revenues 158 126 464 331
Ultra-deepwater floaters        
Revenue        
Contract drilling revenues 590 696 1,961 2,053
Ultra-deepwater floaters | U.S.        
Revenue        
Contract drilling revenues 327 400 1,104 1,202
Ultra-deepwater floaters | Brazil        
Revenue        
Contract drilling revenues 160 223 559 636
Ultra-deepwater floaters | Other Countries        
Revenue        
Contract drilling revenues 103 73 298 215
Harsh environment floaters        
Revenue        
Contract drilling revenues 347 332 1,023 869
Harsh environment floaters | Norway        
Revenue        
Contract drilling revenues 185 177 541 476
Harsh environment floaters | Australia        
Revenue        
Contract drilling revenues 107 102 316 277
Harsh environment floaters | Other Countries        
Revenue        
Contract drilling revenues $ 55 $ 53 $ 166 $ 116