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Leases (Tables)
 6 Months Ended
Jun. 30, 2021
Leases [Abstract]  
Schedule of future undiscounted cash flows
For operating leases where we are the lessee, our future undiscounted cash flows as at June 30, 2021 are as follows:
(In $ millions)Future cash flows
July 1 - December 31, 202122 
Year ended December 31, 202251 
Year ended December 31, 20232 
Year ended December 31, 20241 
Year ended December 31, 2025 and thereafter— 
Total76 
Schedule of reconciliation and supplementary information
The following table gives a reconciliation between the undiscounted cash flows and the related operating lease liability recognized in our Consolidated Balance Sheets as at June 30, 2021 and December 31, 2020:
(In $ millions)As at June 30, 2021As at December 31, 2020
Total undiscounted cash flows76 79 
Less: short term leases— — 
Less: discount(5)(11)
Operating lease liability71 68 
Of which:
Current67 51 
Non-current4 17 
The following table gives supplementary information regarding our lease accounting for the six months ended June 30, 2021 and six months ended June 30, 2020:
(In $ million)Six months ended June 30, 2021Six months ended June 30, 2020
Operating Lease Cost:
Operating lease cost5 4 
Short-term lease cost— — 
Total Lease cost5 4 
Other information:
Cash paid for amounts included in the measurement of lease liabilities - Operating Cash flows5 4 
Right-of-use assets obtained in exchange for operating lease liabilities during the period— — 
Weighted-average remaining lease term in months1228
Weighted-average discount rate29 %13 %
Schedule of operating subleases The estimated future undiscounted cash flows on these leases as at June 30, 2021 are as follows:
(In $ millions)Future cash flows
July 1 - December 31, 202114 
Year ended December 31, 202228 
Year ended December 31, 202328 
Year ended December 31, 202421 
2024 and thereafter20 
Total111