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Cash and Cash Equivalents, and Investments - Strategic Investment (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Oct. 31, 2018
--- | --- | ---
Schedule of Investments [Line Items] |  |
Cost method investment |  | $ 10.0
Other Assets | Equity Investments |  |
Schedule of Investments [Line Items] |  |
Investments | $ 3.0 |

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