Retirement benefits - Projected future benefit payments (Details) $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2025
USD ($)
| |
| Disclosure of defined benefit plans [line items] | |
| Defined benefit pension plans | $ 1,876 |
| Not later than one year [member] | |
| Disclosure of defined benefit plans [line items] | |
| Defined benefit pension plans | 29 |
| Later than one year and not later than two years [member] | |
| Disclosure of defined benefit plans [line items] | |
| Defined benefit pension plans | 31 |
| Later than two years and not later than five years [member] | |
| Disclosure of defined benefit plans [line items] | |
| Defined benefit pension plans | 100 |
| Later than five years [member] | |
| Disclosure of defined benefit plans [line items] | |
| Defined benefit pension plans | $ 1,716 |