XML 59 R52.htm IDEA: XBRL DOCUMENT v3.21.2
Equipment (Tables)
6 Months Ended
Jun. 30, 2021
Property, Plant and Equipment [Abstract]  
Equipment
The following table summarizes the movement for the six months ended June 30, 2020:
 (In $ millions)
CostAccumulated depreciationNet book value
As at January 1, 202038 (15)23 
Depreciation— (3)(3)
As at June 30, 202038 (18)20

The following table summarizes the movement for the six months ended June 30, 2021:
 (In $ millions)
CostAccumulated depreciationNet book value
As at January 1, 202139 (20)19 
Depreciation— (3)(3)
As at June 30, 202139 (23)16