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Supplemental Cash Flow Information (Tables)
 6 Months Ended
Jun. 30, 2019
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Information Supplemental Cash Flow Information
 
 
Six Months Ended June 30,
(In millions)
 
2019
 
2018
Included in operating activities:
 
 
 
 
Interest paid, net of amounts capitalized
 
$
70

 
$
134

Income taxes paid to taxing authorities
 
149

 
282

Noncash investing activities:
 
 

 
 

Increase (decrease) in asset retirement costs
 
$
29

 
$
(1
)
Asset retirement obligations assumed by buyer(a)
 
109

 
3

(a)    In 2019, we closed the sale of the Droshky field (Gulf of Mexico) and the sale of our non-operated interest in the Atrush block in Kurdistan.