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Cash Flow Information (Notes)
12 Months Ended
Dec. 31, 2017
Supplemental Cash Flow Information [Abstract]  
Cash Flow Information
Cash Flow Information
Detail of supplemental disclosures of cash flow and non-cash investing and financing information was:
 
Year Ended December 31,
 
2017
 
2016
 
2015
 
(In millions)
Interest paid, net of amount capitalized
$
868

 
$
890

 
$
924

Income taxes paid (a)
9

 
14

 
12

Non-cash investing and financing activities:
 
 
 
 
 
Additions/(decrease) to fixed assets for accrued capital expenditures
70

 
35

 
(44
)

(a) In 2017, income taxes paid of $11 million are offset by $2 million in income tax refunds. In 2015, income taxes paid of $13 million are offset by $1 million in income tax refunds.