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Other revenues
 6 Months Ended
Jun. 30, 2021
Revenue from Contract with Customer [Abstract]  
Other revenues Other revenues
Other revenues consist of the following:
(In $ millions)Six months ended June 30, 2021Six months ended June 30, 2020
Leasing revenues12 9 
Total other revenues12 9 

Leasing revenues

Revenue earned on the charter of the West Castor, West Telesto and West Tucana to Gulfdrill.