Goodwill and other intangibles - Key Assumptions (Details) $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2025
USD ($)
| |
| Product pricing | |
| Disclosure of detailed information about intangible assets [line items] | |
| Significant unobservable input, monetary | $ 96 |
| Significant unobservable input, percentage | 0.02 |
| Production volumes | |
| Disclosure of detailed information about intangible assets [line items] | |
| Significant unobservable input, monetary | $ 18 |
| Significant unobservable input, percentage | 0.11 |
| Operating costs | |
| Disclosure of detailed information about intangible assets [line items] | |
| Significant unobservable input, monetary | $ 84 |
| Significant unobservable input, percentage | 0.03 |