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Exceptional items - Additional information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Exceptional items |  |  |  |
Impairment - property, plant and equipment |  |  | $ 11 |
Foreign exchange gain (loss) | $ (2) | $ (3) | (4) | $ (4)
Net finance income | (23) | 40 | (46) | 63
Exceptional income tax (credit)/charge | (2) | 12 | (11) | 19
Exceptional items. |  |  |  |
Exceptional items |  |  |  |
Exceptional items before tax |  |  | 6 | (87)
Impairment - property, plant and equipment | 11 |  | 11 |
Restructuring costs | 15 |  | 15 |
Exceptional operating items, after tax | 12 | (58) |  | (93)
Start-up related and other costs | 11 | 16 | 21 | 30
Transaction related and other costs | 3 | 4 | 12 | 8
Gain on movement in fair market values |  |  | 53 | 146
Net finance income | 26 | 74 | 53 | 125
Exceptional income tax (credit)/charge | $ (2) | $ (4) | (6) | (6)
Legal settlement |  |  | 6 |
Professional fees |  |  | 6 |
Income tax benefit |  |  | 6 | 6
Exceptional items. | Promissory Note |  |  |  |
Exceptional items |  |  |  |
Foreign exchange gain (loss) |  |  |  | (21)
Americas | Exceptional items. |  |  |  |
Exceptional items |  |  |  |
Start-up related and other costs |  |  | 14 | 14
Europe | Exceptional items. |  |  |  |
Exceptional items |  |  |  |
Impairment - property, plant and equipment |  |  | 11 |
Restructuring costs |  |  | 15 |
Start-up related and other costs |  |  | $ 7 | $ 16

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