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Supplementary cash flow information (Tables) | 12 Months Ended
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Dec. 31, 2020
Supplemental Cash Flow Elements [Abstract] |
Summary of non-cash investing and financing activities | The table below summarizes the non-cash investing and financing activities relating to the periods presented:
| Successor |  |  | Predecessor
(In $ millions) | Year ended December 31, 2020 |  | Year ended December 31, 2019 |  | Period from July 2, 2018 through December 31, 2018 |  |  | Period from January 1, 2018 through July 1, 2018
Non-cash investing activities |  |  |  |  |  |  |  |
Proceeds from sale of West Epsilon rig (1) | 12 |  |  | — |  |  | — |  |  |  | — |
Non-cash financing activities |  |  |  |  |  |  |  |
Repayment of debt following sale of West Epsilon rig (1) | (12) |  |  | — |  |  | — |  |  |  | — |
(1)During September 2020, the West Epsilon was sold for net proceeds of $12 million. The proceeds were paid directly to the banks as an early repayment against our external debt.

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