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PROVISIONS - Narrative (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Disclosure of other provisions [line items] |  |  |
Total provisions | $ 476.7 | $ 394.7 |
Current portion of provisions | 6.5 | 6.7 |
Non-current provisions | 470.2 | 388.0 |
Asset retirement obligations |  |  |
Disclosure of other provisions [line items] |  |  |
Total provisions | 460.4 | 380.0 | $ 368.4
Current portion of provisions | 6.5 | 6.7 |
Non-current provisions | 453.9 | 373.3 |
Other |  |  |
Disclosure of other provisions [line items] |  |  |
Total provisions | $ 16.3 | $ 14.7 |

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