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Investment in associated companies (Tables)
6 Months Ended
Jun. 30, 2021
Equity Method Investments and Joint Ventures [Abstract]  
Schedule of investment in associated companies
As at June 30, 2021 and December 31, 2020, the carrying values of our investments in associated companies were as follows.

(In $ millions)As at June 30, 2021As at December 31, 2020
Seabras Sapura108 103 
Shareholder loans provided to Seabras Sapura115 121 
Sonadrill23 22 
Gulfdrill
Total investment in associated companies248 248