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Acquisition of Jamalco - Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions | May 02, 2023 | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Less: identifiable assets acquired and liabilities assumed |  |  |
Deferred credit - preliminary bargain purchase gain |  | $ (161.6) | $ 0.0
General Alumina Holdings Limited |  |  |
Consideration transferred |  |  |
Cash paid | $ 8.3 |  |
Total consideration transferred | 8.3 |  |
Less: identifiable assets acquired and liabilities assumed |  |  |
Cash and cash equivalents | 19.4 |  |
Restricted cash | 8.3 |  |
Inventories | 93.4 |  |
Accounts receivable - net | 8.0 |  |
Prepaid and other current assets | 7.8 |  |
Property, plant and equipment - net | 250.9 |  |
Other assets | 28.0 |  |
Accounts payable, trade | (92.9) |  |
Accrued and other current liabilities | (33.9) |  |
Other liabilities | (24.5) |  |
Asset retirement obligations | (36.5) |  |
Total identifiable net assets acquired | 228.0 |  |
Less: noncontrolling interest | (58.1) |  |
Deferred credit - preliminary bargain purchase gain | (161.6) |  |
Fair value allocated to net assets acquired, net of bargain purchase gain | $ 8.3 |  |

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