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Investments - Equity Method Investments Narratives (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Mar. 31, 2023 | Mar. 17, 2023 | Dec. 31, 2022
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |
Equity method investments | $ 120.6 |  | $ 120.6 |  |  |  | $ 93.0
Equity in earnings (loss) of unconsolidated affiliates |  |  | 1.2 | $ (0.6) |  |  |
Payments to acquire equity interest |  |  | 25.5 |  |  |  |
Howden Industries |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |
Equity method investments | 22.3 |  | 22.3 |  |  |  |
Cryomotive GmbH |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |
Equity method investments | 5.0 |  | 5.0 |  |  |  | 4.9
Equity in earnings (loss) of unconsolidated affiliates | (0.1) | $ 0.4 | (0.1) | 0.9 |  |  |
HTEC |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |
Equity method investments | 82.0 |  | 82.0 |  |  |  | 80.8
Equity in earnings (loss) of unconsolidated affiliates | 0.6 | (0.3) | (0.4) | (0.5) |  |  |
Hudson Products de Mexico S.A. de CV |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |
Equity method investments | 4.5 |  | 4.5 |  |  |  | 4.0
Equity in earnings (loss) of unconsolidated affiliates | $ 0.2 | 0.3 | $ 0.5 | 0.6 |  |  |
Equity investments, ownership interest (percent) | 50.00% |  | 50.00% |  |  |  |
Liberty LNG |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |
Equity method investments | $ 3.0 |  | $ 3.0 |  |  |  | $ 2.9
Equity in earnings (loss) of unconsolidated affiliates | $ 0.0 | $ 0.1 | $ 0.1 | $ 0.2 |  |  |
Equity investments, ownership interest (percent) | 25.00% |  | 25.00% |  |  |  |
Other Investments |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |
Equity in earnings (loss) of unconsolidated affiliates |  |  | $ 0.4 |  |  |  |
Hylium Industries, Inc. |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |
Equity method investments |  |  |  |  | $ 2.2 |  |
Equity investments, ownership interest (percent) |  |  |  |  | 50.00% |  |
Payments to acquire equity interest |  |  | 2.3 |  |  |  |
L &T Howden Private Ltd. |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |
Equity method investments |  |  |  |  | $ 22.3 |  |
Equity in earnings (loss) of unconsolidated affiliates | $ 0.1 |  | $ 0.1 |  |  |  |
Equity investments, ownership interest (percent) |  |  |  |  |  | 49.90% |

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