12. Amortisation and depreciation charges
| 2022 US$m | 2021 US$m | |
| Benchmark: | ||
| Amortisation of other intangible assets | 358 | 326 |
| Depreciation of property, plant and equipment | 126 | 127 |
| 484 | 453 | |
| Non-benchmark: | ||
| Amortisation of acquisition intangibles | 174 | 138 |
| 658 | 591 |
An analysis by segment of amounts charged within Benchmark PBT is given in note 9(a)(iv). Analyses by asset type are given in notes 21 and 22. The depreciation charge for the year includes US$56m (2021: US$55m) in respect of right-of-use assets.