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Implementation of IFRS16 Leases - impact of IFSRS 16 on consoidated balance sheet 2 (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | --- | --- | ---
Disclosure of expected impact of initial application of new standards or interpretations [line items] |  |  |  |  |
Noncurrent Assets | $ 93,285 |  | $ 86,452 | $ 83,911 |
Current Assets | 24,778 |  | 26,056 |  |
Total assets | 118,063 |  | 112,508 |  |
Total equity | 41,159 |  | 42,990 | $ 39,885 | $ 35,099
Total non-current liabilities | 57,346 |  | 52,914 |  |
Total current liabilities | 19,557 |  | 16,605 |  |
Total equity and liabilities | 118,063 |  | $ 112,508 |  |
weighted average incremental borrowing rate used when calculating lease liabilities |  | 3.10% |  |  |
Previously stated [member] |  |  |  |  |
Disclosure of expected impact of initial application of new standards or interpretations [line items] |  |  |  |  |
Noncurrent Assets | 89,546 |  |  |  |
Current Assets | 24,750 |  |  |  |
Total assets | 114,296 |  |  |  |
Total equity | 41,235 |  |  |  |
Total non-current liabilities | 54,565 |  |  |  |
Total current liabilities | 18,496 |  |  |  |
Total equity and liabilities | 114,296 |  |  |  |
IFRS 16 Adjustments [member] |  |  |  |  |
Disclosure of expected impact of initial application of new standards or interpretations [line items] |  |  |  |  |
Noncurrent Assets | 3,738 | $ 4,044 |  |  |
Current Assets | 29 | 45 |  |  |
Total assets | 3,767 | 4,089 |  |  |
Total equity | (76) |  |  |  |
Total non-current liabilities | 2,781 | 3,054 |  |  |
Total current liabilities | 1,061 | $ 1,035 |  |  |
Total equity and liabilities | $ 3,767 |  |  |  |

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