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COMMITMENTS AND CONTINGENCIES - Prepayment agreement (Details) - Auramet International LLC ("Auramet") - Prepayment Agreement - Guarantee Obligation - Precious metal - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Other Commitments |  |  |  |
Net proceeds from sales on a Supplier Advance Basis | $ 13.5 | $ 0.0 | $ 38.2 | $ 4.8
Revenue from sales on a Supplier Advance Basis | 8.4 | $ 2.0 | 38.2 | $ 4.8
Remaining net proceeds recorded as deferred revenue | $ 0.0 |  | $ 0.0 |

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