Cash and cash equivalents (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||||
| Balance per consolidated balance sheet | $ 8,913 | $ 8,872 | $ 9,015 | |
| Bank overdrafts repayable on demand (unsecured) | 0 | (7) | (2) | |
| Balance per Group cash flow statement | $ 8,913 | $ 8,865 | $ 9,013 | $ 8,484 |
| X | ||||||||||
- Definition The amount that has been withdrawn from an account in excess of existing cash balances. This is considered a short-term extension of credit by the bank. [Refer: Cash and cash equivalents] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The amount of cash and cash equivalents in the statement of cash flows when different from the amount of cash and cash equivalents in the statement of financial position. [Refer: Cash and cash equivalents] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- References No definition available.
|