XML 78 R71.htm IDEA: XBRL DOCUMENT v3.21.2
Segment information - Results by Segment (Details)
$ in Millions
 6 Months Ended
Jun. 30, 2021
USD ($)
segment
Jun. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Segment Reporting [Abstract]        
Number of reportable segments | segment 3      
Number of operating segments | segment 3      
Segment Reporting Information [Line Items]        
Total operating revenue $ 452 $ 598    
Loss on impairment of long-lived assets 152 1,230    
Operating loss - Net loss        
Operating loss (252) (1,372)    
Unallocated items:        
Total financial items and other (342) (374)    
Income taxes (11) (2)    
Net loss (605) (1,748)    
Investments in associated companies 248   $ 248  
Cash and restricted cash 644 1,020 723 $ 1,357
Other assets 232   240  
Total assets 3,657   3,961  
Drilling units - capital expenditures 40 85    
Harsh environment        
Segment Reporting Information [Line Items]        
Loss on impairment of long-lived assets 152 160    
Operating loss - Net loss        
Operating loss (177) (147)    
Unallocated items:        
Drilling units - capital expenditures 17 11    
Floaters        
Segment Reporting Information [Line Items]        
Loss on impairment of long-lived assets 0 1,070    
Operating loss - Net loss        
Operating loss (27) (1,184)    
Unallocated items:        
Drilling units - capital expenditures 12 58    
Jack-up rigs        
Segment Reporting Information [Line Items]        
Loss on impairment of long-lived assets 0 0    
Operating loss - Net loss        
Operating loss (1) 10    
Unallocated items:        
Drilling units - capital expenditures 10 7    
Other        
Operating loss - Net loss        
Operating loss (47) (51)    
Unallocated items:        
Drilling units - capital expenditures 1 9    
Operating Segments        
Segment Reporting Information [Line Items]        
Total operating revenue 452 598    
Depreciation 83 182    
Unallocated items:        
Total drilling units 1,927   2,120  
Operating Segments | Harsh environment        
Segment Reporting Information [Line Items]        
Total operating revenue 232 276    
Depreciation 43 52    
Unallocated items:        
Total drilling units 858   1,032  
Operating Segments | Floaters        
Segment Reporting Information [Line Items]        
Total operating revenue 154 216    
Depreciation 19 105    
Unallocated items:        
Total drilling units 507   528  
Operating Segments | Jack-up rigs        
Segment Reporting Information [Line Items]        
Total operating revenue 60 98    
Depreciation 21 25    
Unallocated items:        
Total drilling units 562   560  
Operating Segments | Other        
Segment Reporting Information [Line Items]        
Total operating revenue 6 $ 8    
Segment Reconciling Items        
Unallocated items:        
Investments in associated companies 248   248  
Cash and restricted cash 644   723  
Other assets $ 838   $ 870