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FAIR VALUE MEASUREMENT - Derivative contracts (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
FAIR VALUE MEASUREMENT |  |
Unrealized fair value of derivative assets, current | $ 15.0 | $ 25.5
Unrealized fair value of derivative assets, non-current | 2.8 | 1.5
Unrealized fair value of derivative assets | 17.8 | 27.0
Unrealized fair value of derivative liabilities, current | (2.0) | (0.8)
Unrealized fair value of derivative liabilities, non-current | (0.5) |
Unrealized fair value of derivative liabilities | (2.5) | (0.8)
Total net fair value | 15.3 | 26.2
TRS |  |
FAIR VALUE MEASUREMENT |  |
Total net fair value | 6.9 | 1.9
Derivative Contracts |  |
FAIR VALUE MEASUREMENT |  |
Total net fair value | 15.3 | 26.2
Unrealized gain (loss) recorded in AOCI | 5.1 | 17.5
Foreign currency forward and collar contracts |  |
FAIR VALUE MEASUREMENT |  |
Total net fair value | 7.4 | 2.8
Unrealized gain (loss) recorded in AOCI | 4.4 | 1.3
Reclassification of amounts to net earnings within the next 12 months as a result of settling the contracts | 4.0 |
Energy swap contracts |  |
FAIR VALUE MEASUREMENT |  |
Total net fair value | 1.0 | 21.5
Unrealized gain (loss) recorded in AOCI | 0.7 | $ 16.2
Reclassification of amounts to net earnings within the next 12 months as a result of settling the contracts | $ (0.1) |

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