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Trade receivables (Details 2) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
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Analysis of overdue amounts [line items] |  |  |  |
Total trade receivables, net | $ 8,066 | $ 8,005 |  |
Trade receivables [member] |  |  |  |
Analysis of overdue amounts [line items] |  |  |  |
Total trade receivables, net | 8,066 | 8,005 |  |
Trade receivables [member] | Current [member] |  |  |  |
Analysis of overdue amounts [line items] |  |  |  |
Total trade receivables, net | 7,664 | 7,639 |  |
Trade receivables [member] | Not later than one month [member] |  |  |  |
Analysis of overdue amounts [line items] |  |  |  |
Total trade receivables, net | 190 | 162 |  |
Trade receivables [member] | Later than one month and not later than three months [member] |  |  |  |
Analysis of overdue amounts [line items] |  |  |  |
Total trade receivables, net | 110 | 99 |  |
Trade receivables [member] | Later than three months and not later than six months [member] |  |  |  |
Analysis of overdue amounts [line items] |  |  |  |
Total trade receivables, net | 62 | 63 |  |
Trade receivables [member] | Later than six months and not later than one year [member] |  |  |  |
Analysis of overdue amounts [line items] |  |  |  |
Total trade receivables, net | 23 | 28 |  |
Trade receivables [member] | Later than one year [member] |  |  |  |
Analysis of overdue amounts [line items] |  |  |  |
Total trade receivables, net | 79 | 97 |  |
Trade receivables [member] | Provision for doubtful receivable [member] |  |  |  |
Analysis of overdue amounts [line items] |  |  |  |
Provision for doubtful receivable | $ (62) | $ (83) | $ (93) | $ (95)

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