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Investments - Equity Method Investments Narratives (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2022 | Mar. 31, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | May 04, 2022 | Dec. 31, 2021 | Aug. 27, 2021
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |
Equity method investments | $ 97.0 |  |  | $ 97.0 |  |  | $ 99.6 |
Equity in (loss) earnings of unconsolidated affiliates, net |  |  |  | (0.6) | $ 0.2 |  |  |
Realized gain on equity method investment | 0.3 |  | $ 0.0 | 0.3 | 0.0 |  |  |
Equity Method Investment, Nonconsolidated Investee or Group of Investees |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |
Equity method investments | 97.0 |  |  | 97.0 |  |  | 99.6 |
Equity in (loss) earnings of unconsolidated affiliates, net |  |  |  | (0.6) |  |  |  |
Realized gain on equity method investment |  | $ 0.3 |  |  |  |  |  |
Cryomotive GmbH | Equity Method Investment, Nonconsolidated Investee or Group of Investees |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |
Equity method investments | 5.7 |  |  | 5.7 |  |  | 7.1 |
Equity in (loss) earnings of unconsolidated affiliates, net | (0.4) |  |  | (0.9) |  |  |  |
HTEC | Equity Method Investment, Nonconsolidated Investee or Group of Investees |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |
Equity method investments | 84.4 |  |  | 84.4 |  |  | 86.4 |
Equity in (loss) earnings of unconsolidated affiliates, net | (0.3) |  |  | (0.5) |  |  |  |
Hudson Products de Mexico S.A. de CV | Equity Method Investment, Nonconsolidated Investee or Group of Investees |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |
Equity method investments | 3.8 |  |  | 3.8 |  |  | 3.3 |
Equity in (loss) earnings of unconsolidated affiliates, net | $ 0.3 |  | 0.1 | $ 0.6 | 0.1 |  |  |
Equity investments, ownership interest (percent) | 50.00% |  |  | 50.00% |  |  |  |
Liberty LNG | Equity Method Investment, Nonconsolidated Investee or Group of Investees |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |
Equity method investments | $ 2.7 |  |  | $ 2.7 |  |  | $ 2.4 |
Equity in (loss) earnings of unconsolidated affiliates, net | $ 0.1 |  | $ 0.1 | $ 0.2 | $ 0.1 |  |  |
Equity investments, ownership interest (percent) | 25.00% |  |  | 25.00% |  |  |  |
Other Investments | Equity Method Investment, Nonconsolidated Investee or Group of Investees |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |
Equity in (loss) earnings of unconsolidated affiliates, net |  |  |  | $ 0.4 |  |  |  |
AdEdge India | Equity Method Investment, Nonconsolidated Investee or Group of Investees |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |
Equity method investments |  |  |  |  |  |  |  | $ 0.5
Equity investments, ownership interest (percent) |  | 50.00% |  |  |  | 50.00% |  | 50.00%
Realized gain on equity method investment |  | $ 0.3 |  |  |  |  |  |

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