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Supplemental Cash Flow Information (Tables) | 3 Months Ended
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Mar. 31, 2018
Supplemental Cash Flow Elements [Abstract] |
Schedule of Cash and Cash Equivalents [Table Text Block] |
(In millions) | March 31, 2018 |  | December 31, 2017
Cash and cash equivalents | $ | 2 |  |  | $ | 5 |
Restricted cash(1) | 4 |  |  | 4 |
Cash, cash equivalents and restricted cash(2) | $ | 6 |  |  | $ | 9 |
(1) | The restricted cash balance is included within “Other current assets” on the Consolidated Balance Sheets.
(2) | As a result of the adoption of ASU 2016-18, the Consolidated Statements of Cash Flows now explain the change during the period of both “Cash and cash equivalents” and “Restricted cash.”
Summary of Supplemental Cash Flow Information [Table Text Block] |
| Three Months Ended March 31,
(In millions) | 2018 |  | 2017
Net cash provided by operating activities included: |  |  |
Interest paid (net of amounts capitalized) | $ | 103 |  |  | $ | 49 |
Non-cash investing and financing activities: |  |  |
Net transfers of property, plant and equipment from materials and supplies inventories | 1 |  |  | 6 |
Contribution of fixed assets to joint venture(1) | $ | — |  |  | $ | 328 |
(1) | Contribution of assets to Sherwood Midstream and Sherwood Midstream Holdings. See Note 5.
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:
| Three Months Ended March 31,
(In millions) | 2018 |  | 2017
(Decrease) increase in capital accruals | $ | (6 | ) |  | $ | 2 |

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