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Supplemental Cash Flow Information (Tables) | 6 Months Ended
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Jun. 30, 2017
Supplemental Cash Flow Elements [Abstract] |
Summary of Supplemental Cash Flow Information [Table Text Block] |
| Six Months Ended June 30,
(In millions) | 2017 |  | 2016
Net cash provided by operating activities included: |  |  |
Interest paid (net of amounts capitalized) | $ | 99 |  |  | $ | 109 |
Non-cash investing and financing activities: |  |  |
Net transfers of property, plant and equipment from materials and supplies inventories | $ | 5 |  |  | $ | (4 | )
Contribution of fixed assets to joint venture(1) | 337 |  |  | — |
Summary of Reconciliation of Additions to Property, Plant and Equipment to Total Capital Expenditures [Table Text Block] | The following is the change of additions to property, plant and equipment related to capital accruals:
| Six Months Ended June 30,
(In millions) | 2017 |  | 2016
Increase (decrease) in capital accruals | $ | 33 |  |  | $ | (7 | )

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- Definition Schedule of Reconciliation of Additions to Property, Plant And Equipment to Total Capital Expenditures [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
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