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Equity - Noncontrolling (Details) - USD ($) $ in Millions |  | 6 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2020 | Jun. 30, 2020 | Mar. 30, 2020 | Dec. 31, 2019
Feralloy Processing Company |  |  |  |
Joint Ventures and Noncontrolling Interests |  |  |  |
Carrying value of noncontrolling interest | $ 0.0 |  | $ 1.1 |
Feralloy Processing Company |  |  |  |
Joint Ventures and Noncontrolling Interests |  |  |  |
Ownership percentage acquired | 49.00% | 49.00% |  |
Ownership percentage in consolidated investments other than equity method investment | 100.00% | 100.00% | 51.00% | 51.00%
Payments for acquired equity interest | $ 8.0 |  |  |

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