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Significant Accounting Policies - Revenue Disaggregation and Customer-Related Liabilities (Details) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2020 USD ($) agreement | Dec. 31, 2019 USD ($)
Online sports betting and iGaming market access |  |
Disaggregation of Revenue [Line Items] |  |
Customer-related liabilities | $ 51.8 | $ 43.6
Number of operator agreements containing ordinary shares and warrants | agreement | 2 |
Loyalty credit obligation |  |
Disaggregation of Revenue [Line Items] |  |
Customer-related liabilities | $ 35.2 | 36.2
Customer-related liabilities, term | 6 months |
Advance payments on goods and services yet to be provided and unpaid wagers |  |
Disaggregation of Revenue [Line Items] |  |
Customer-related liabilities | $ 42.1 | 42.2
Customer-related liabilities, long-term | $ 0.6 | $ 0.6

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