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Supplemental Cash Flow Information
 12 Months Ended
Dec. 31, 2019
Supplemental Cash Flow Information [Abstract]  
Supplemental Cash Flow Information Supplemental Cash Flow Information
 
Year Ended December 31,
(In millions)
2019
 
2018
 
2017
Included in operating activities:
 
 
 
 
 
Interest paid, net of amounts capitalized
$
269

 
$
270

 
$
379

Income taxes paid to taxing authorities, net of refunds received(a)
73

 
287

 
391

Noncash investing activities, related to continuing operations:
 
 
 
 
 
Increase (decrease) in asset retirement costs
$
80

 
$
(183
)
 
$
(202
)
Asset retirement obligations assumed by buyer(b)
1,082

 
82

 
14

Notes receivable for disposition of assets
—

 
—

 
748


(a) 
2019, 2018 and 2017 includes $90 million, $37 million and $1 million, related to tax refunds. 2017 included a payment of $108 million made to the U.K. tax authorities to preserve our appeal rights, see Note 25 for additional discussion.
(b) 
In 2019, our dispositions include the sale of the Droshky field (Gulf of Mexico), the sale of our non-operated interest in the Atrush block in Kurdistan and the sale of our U.K. business. See Note 5 for further detail on dispositions.

Other noncash investing activities include accrued capital expenditures as of December 31, 2019, 2018 and 2017 of $288 million, $250 million and $329 million.