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Supplemental Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2019
Supplemental Cash Flow Information |
Schedule of changes in operating assets and liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years ended December 31, |
​ |  | 2019 |  | 2018 |  | 2017 |
Changes in other operating assets and liabilities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Decrease in accounts receivable |  | $ | 87 | ​ | $ | 180 | ​ | $ | 230 | ​
(Increase) decrease in other assets | ​ | ​ | (30) | ​ | ​ | 3 | ​ | ​ | (37) | ​
Decrease in accounts payable and other current liabilities | ​ | ​ | (21) | ​ | ​ | (154) | ​ | ​ | (115) | ​
(Decrease) increase in other long-term liabilities | ​ | ​ | (34) | ​ | ​ | 80 | ​ | ​ | (13) | ​
Change in income taxes receivable / payable, net | ​ | ​ | (303) | ​ | ​ | 125 | ​ | ​ | (58) | ​
Change in receivables from / payables to affiliates, net | ​ | ​ | (10) | ​ | ​ | — | ​ | ​ | — | ​
​ |  | $ | (311) | ​ | $ | 234 | ​ | $ | 7 | ​
Additional cash flow information | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years ended December 31, |
​ |  | 2019 |  | 2018 |  | 2017 |
Certain cash operating activities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash payments for interest |  | $ | 648 | ​ | $ | 570 | ​ | $ | 486 | ​
Cash payments for income taxes | ​ | ​ | 121 | ​ | ​ | 151 | ​ | ​ | 124 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Non-cash investing and financing activities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Capital additions, accrued at end of period (a) | ​ | $ | 48 | ​ | $ | 30 | ​ | $ | 20 | ​
Issuance of shares in business combinations (b) | ​ | ​ | — | ​ | ​ | 2,112 | ​ | ​ | — | ​
Issuance of debt in business combination (c) | ​ | ​ | — | ​ | ​ | 1,026 | ​ | ​ | — | ​
| (a) | Additions to property and equipment for which we had accrued a corresponding liability in accounts payable at the end of the period. See Note 7—Drilling Fleet. |
| (b) | In connection with our acquisition of Songa and Ocean Rig, we issued 66.9 million and 147.7 million shares, respectively, with an aggregate fair value of $735 million and $1.4 billion, respectively. See Note 4—Business Combinations. |
| (c) | In connection with our acquisition of Songa, we issued $854 million aggregate principal amount of Exchangeable Bonds as partial consideration to Songa shareholders and settlement for certain Songa indebtedness. See Note 4—Business Combinations. |

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- Definition Tabular disclosure of the net increase (decrease) in operating capital in the operating section of the statement of cash flows, represents the entire footnote disclosure that provides details regarding the net change during the reporting period of all assets and liabilities used in operating activities. + References No definition available. + Details
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