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Cash flows reconciliation - cash flow from investing activities (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Cash Flows Reconciliation |  |  |
Disbursement related to VNC sale |  | $ (555) |
Proceeds from sale of CSI | 437 |  |
Proceeds from sale of Midwestern System, net of cash | 140 |  |
Proceeds from disposal of Mosaic shares |  | 1,259 |
Proceeds from sale of Vale Florestar | 9 | 10 | 10
Proceeds from disposal of VLI shares |  |  | 241
Proceeds from sale of Longyu |  |  | 156
Proceeds from disposal of investments, net | $ 586 | $ 714 | $ 407

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