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Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2017
Supplemental Cash Flow Information [Abstract] |
Details of supplemental disclosures of cash flow and non-cash investing and financing 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.

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