Financial instruments (Details 3) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
|
| Disclosure of detailed information about borrowings [line items] | ||
| Transfers out of Level 3 of fair value hierarchy, assets | $ (8) | |
| Description of reasons for transfers out of Level 3 of fair value hierarchy, assets | In the first half of 2026, there was one transfer of equity securities from Level 3 to Level 1 for USD 8 million due to Initial Public Offering of the invested company. | |
| Carrying reported amount fair value disclosure [member] | ||
| Disclosure of detailed information about borrowings [line items] | ||
| Bonds issued | $ 40,542 | $ 27,929 |
| Fair value disclosure item amounts [member] | ||
| Disclosure of detailed information about borrowings [line items] | ||
| Bonds issued | $ 39,200 | $ 26,600 |