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Supplemental Cash Flow Information
 12 Months Ended
Dec. 31, 2018
Supplemental Cash Flow Information [Abstract]  
Supplemental Cash Flow Information
Supplemental Cash Flow Information 
 
Year Ended December 31,
 
2018
 
2017
 
2016
 
(In $ millions)
Interest paid, net of amounts capitalized
133

 
130

 
130

Taxes paid, net of refunds
100

 
123

 
129

Noncash Investing and Financing Activities
 

 
 

 
 

Accrued treasury stock repurchases
13

 
—

 
—

Accrued capital expenditures
(4
)
 
14

 
1

Asset retirement obligations
(7
)
 
2

 
2

Fair value adjustment to securities available for sale, net of tax
—

 
(1
)
 
—