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Marketable securities (Tables)
 6 Months Ended
Jun. 30, 2019
Marketable Securities [Abstract]  
Marketable securities held
The below table shows the carrying value of our investments in marketable securities for periods presented in this report.
 
 
Successor

 
Successor

(In $ millions)
 
As at June 30, 2019

 
As at December 31, 2018

Seadrill Partners - Common units
 
9

 
45

Archer
 
13

 
12

Total marketable securities
 
22

 
57
Gains and losses related to marketable securities
The below table shows the gain and losses recognized through net income for the periods presented in this report.
 
 
Successor

 
 
Predecessor


Successor



Predecessor

(In $ millions)
 
Three months ended June 30, 2019

 
 
Three Months Ended June 30, 2018


Six months ended June 30, 2019



Six months ended June 30, 2018

Seadrill Partners - Common units
 
(13
)
 
 
19

 
(36
)
 
 
(5
)
Archer
 
(1
)
 
 
6

 
1

 
 
2

Total (loss)/gain on marketable securities
 
(14
)
 
 
25

 
(35
)
 
 
(3
)