Decommissioning and other provisions - Maturity analysis (Details) - USD ($) $ in Millions |
Dec. 31, 2023 |
Dec. 31, 2022 |
|---|---|---|
| Disclosures Of Decommissioning And Other Provisions [Line Items] | ||
| Amount of provisions expected to be utilized | $ 19,453 | $ 20,000 |
| Between 1 and 5 years | ||
| Disclosures Of Decommissioning And Other Provisions [Line Items] | ||
| Amount of provisions expected to be utilized | 4,766 | |
| Between 6 to 10 years | ||
| Disclosures Of Decommissioning And Other Provisions [Line Items] | ||
| Amount of provisions expected to be utilized | 5,102 | |
| 11 years and later | ||
| Disclosures Of Decommissioning And Other Provisions [Line Items] | ||
| Amount of provisions expected to be utilized | $ 9,585 |