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Other Items (Tables) | 3 Months Ended
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Mar. 31, 2018
Other Income and Expenses [Abstract] |
Net Interest And Other Financial Income (Costs) | Net interest and other financial costs were as follows:
| Three Months Ended March 31,
(In millions) | 2018 |  | 2017
Interest income | $ | (20 | ) |  | $ | (5 | )
Interest expense | 213 |  |  | 163 |
Interest capitalized | (18 | ) |  | (15 | )
Loss on extinguishment of debt | 4 |  |  | — |
Other financial costs | 4 |  |  | 6 |
Net interest and other financial costs | $ | 183 |  |  | $ | 149 |

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