44. Capital commitments
| 2022 US$m | 2021 US$m | |
| Capital expenditure for which contracts have been placed: | ||
| Other intangible assets | 64 | 6 |
| Property, plant and equipment | 17 | 10 |
| 81 | 16 |
Capital commitments at 31 March 2022 included US$2m (2021: US$1m) in respect of right-of-use assets. Capital commitments at 31 March 2022 included commitments of US$56m not expected to be incurred before 31 March 2023. All commitments at 31 March 2021 were expected to be incurred before 31 March 2022. There were no material leases committed to that had not yet started at 31 March 2022 or 31 March 2021.