Loans and borrowings - Convertible Notes Disclosure (Details) - USD ($) $ / shares in Units, $ in Millions |
1 Months Ended | |
|---|---|---|
Jun. 10, 2025 |
Jun. 30, 2025 |
|
| Disclosure Of Detailed Information Of Loans And Borrowings [Line Items] | ||
| Number of convertible notes issued (in shares) | 1,500,000 | |
| Convertible notes issued, par value (in USD per share) | $ 1,000 | |
| At inception | $ 1,913 | |
| Reconciliation Of Convertible Instruments [Abstract] | ||
| Carrying amount of host liability as at June 30, 2025 | 1,913 | |
| Convertible notes | ||
| Disclosure Of Detailed Information Of Loans And Borrowings [Line Items] | ||
| Notional amount | $ 1,500 | |
| Fair value of the embedded derivative | 482 | 479 |
| Transaction costs | (22) | |
| At inception | 996 | 1,000 |
| Reconciliation Of Convertible Instruments [Abstract] | ||
| At inception | 996 | |
| Interest accrued on convertible notes | 4 | |
| Carrying amount of host liability as at June 30, 2025 | $ 996 | $ 1,000 |