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Business combinations, dispositions and related transactions - Acquisition of Remaining Joint Venture Interest in LPC (Details) $ in Millions |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jul. 16, 2024 USD ($) T | Dec. 31, 2024 USD ($) | Sep. 30, 2024 | Jul. 15, 2024 | Dec. 31, 2023 USD ($)
Business combinations, dispositions and related transactions |  |  |  |  |
Borrowings on credit facilities |  | $ 158.6 |  |  |
Pre-tax gain | $ 64.5 | $ 64.5 |  |  |
Aggregate carrying value at the acquisition date |  |  |  |  | $ 111.0
Louisiana Pigment Company, L.P. (LPC) |  |  |  |  |
Business combinations, dispositions and related transactions |  |  |  |  |
Estimated fair value of amount acquired from ownership interest | 178.2 |  |  |  |
Aggregate carrying value at the acquisition date | $ 113.7 |  |  |  |
Louisiana Pigment Company, L.P. (LPC) | Kronos |  |  |  |  |
Business combinations, dispositions and related transactions |  |  |  |  |
Percentage acquired | 50.00% |  | 50.00% |  |
Cash consideration | $ 185.0 |  |  |  |
Earn-out period | 2 years |  |  |  |
Percentage held through wholly-owned subsidiary | 50.00% |  |  | 50.00% |
Additional production volume acquired | T | 78,000 |  |  |  |
Transaction costs | $ 2.2 |  |  |  |
Estimated fair value of the earn-out | 4.2 |  |  |  |
Estimated fair value of amount acquired from ownership interest | 178.2 |  |  |  |
Louisiana Pigment Company, L.P. (LPC) | Kronos | Global Revolver Credit Facility |  |  |  |  |
Business combinations, dispositions and related transactions |  |  |  |  |
Borrowings on credit facilities | 132.1 |  |  |  |
Louisiana Pigment Company, L.P. (LPC) | Kronos | EBITDA of $650 million |  |  |  |  |
Business combinations, dispositions and related transactions |  |  |  |  |
Earn-out payment | 5.0 |  |  |  |
Louisiana Pigment Company, L.P. (LPC) | Kronos | EBITDA is between $650 million and $730 million |  |  |  |  |
Business combinations, dispositions and related transactions |  |  |  |  |
Earn-out payment | 10.0 |  |  |  |
Louisiana Pigment Company, L.P. (LPC) | Kronos | Minimum |  |  |  |  |
Business combinations, dispositions and related transactions |  |  |  |  |
Aggregate EBITDA considered for determining earnout payment | 650.0 |  |  |  |
Louisiana Pigment Company, L.P. (LPC) | Kronos | Maximum |  |  |  |  |
Business combinations, dispositions and related transactions |  |  |  |  |
Earn-out payment | 15.0 |  |  |  |
Aggregate EBITDA considered for determining earnout payment | 730.0 |  |  |  |
Louisiana Pigment Company, L.P. (LPC) | Kronos | Maximum | EBITDA of $730 million or more |  |  |  |  |
Business combinations, dispositions and related transactions |  |  |  |  |
Earn-out payment | $ 15.0 |  |  |  |

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