Impairment - Additional Information (Details) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Disclosure of impairment loss and reversal of impairment loss [line items] | ||
| Impairment charges (reversal), Pre-tax amount | $ 15 | $ (122) |
| Impairment charges, net | $ (15) | |
| Rio Tinto Iron and Titanium Quebec Operations ("RTITQO") | Minerals | ||
| Disclosure of impairment loss and reversal of impairment loss [line items] | ||
| Expected term of business transformation (in months) | 24 months | |
| Effective rate | 7.60% | |
| Recoverable amount | $ 1,780 | |
| Impairment charges (reversal), Pre-tax amount | 122 | |
| Impairment charges, net | $ 86 | |