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Cash and cash equivalents and investment securities - Summary of Investments in Short-Term Debt Securities (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Disclosure of detailed information about borrowings [abstract] |  |
Investment in unquoted companies | $ 139 | $ 115
Investment on debt securities | 22 | 22
Non-current investments | 161 | 137
Investment on debt securities | 374 | 396
Current investments | $ 374 | $ 396

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