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Investment in associated companies | 6 Months Ended
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Jun. 30, 2021
Equity Method Investments and Joint Ventures [Abstract] |
Investment in associated companies | Loss on impairment of equity method investments We have recognized the following impairment of our investments in associated companies in the Consolidated Statements of Operations within "Loss on impairment of investments".
(In $ millions) |  |  |  |  |  | Six months ended June 30, 2021 |  | Six months ended June 30, 2020
Seadrill Partners - Direct ownership interests |  |  |  |  |  | — |  | (47) |
Total loss on impairment of equity method investments |  |  |  |  |  | — |  |  | (47) |
On December 1, 2020 Seadrill Partners had entered into restructuring proceedings and, as a result, we concluded that we no longer had significant influence over its financial and operating decisions as decisions now need court approval or are determined by the courts. Our investment in Seadrill Partners was therefore derecognized as an investment in associate and marketable security and recognized as an available-for-sale security at the closing carrying value of the equity investment in associate, being nil. Furthermore, on emergence from Chapter 11 in May 2021 Seadrill Partners (now Aquadrill) canceled the existing equity interests of their investors, including Seadrill Limited. Investment in associated companies As at June 30, 2021 and December 31, 2020, the carrying values of our investments in associated companies were as follows.
(In $ millions) |  | As at June 30, 2021 |  | As at December 31, 2020
Seabras Sapura |  | 108 |  |  | 103 |
Shareholder loans provided to Seabras Sapura |  | 115 |  |  | 121 |
Sonadrill |  | 23 |  |  | 22 |
Gulfdrill |  | 2 |  |  | 2 |
Total investment in associated companies |  | 248 |  |  | 248 |

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- Definition The entire disclosure for equity method investments and joint ventures. Equity method investments are investments that give the investor the ability to exercise significant influence over the operating and financial policies of an investee. Joint ventures are entities owned and operated by a small group of businesses as a separate and specific business or project for the mutual benefit of the members of the group. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -URI http://asc.fasb.org/topic&trid=2196965 + Details
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