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Supplementary Financial Information- Schedule of Other Income, Net (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Offsetting [Abstract] |  |  |  |
Gain on step-up of equity method investment | $ 0.0 | $ 0.0 | $ 4.4 | $ 0.0
Net gain (loss) on repurchase or extinguishment of debt | 0.0 | 1.9 | (0.3) | (0.3)
Interest income | 0.1 | 0.9 | 0.6 | 1.9
Foreign currency translation gains (losses) | 0.1 | (0.6) | (0.8) | (0.4)
Fair value gains on securities | 0.3 | 0.0 | 0.8 | 0.0
Other | 0.1 | 0.0 | (0.4) | 0.0
Total other income, net | $ 0.6 | $ 2.2 | $ 4.3 | $ 1.2

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