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Equity Investments - Sportech (Details) £ in Millions, $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2014 USD ($) | Jan. 31, 2014 GBP (£) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2014 GBP (£) | Dec. 31, 2013 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Gain on sale of equity interest |  |  | $ 0.0 | $ 14.5 |  | $ 0.0
Sportech |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Equity interest (as a percent) |  |  | 20.00% | 20.00% | 20.00% |
Time lag allowed under Accounting Standards Codification (in days) |  |  | 90 days |  |  |
Sales proceeds | $ 44.9 | £ 27.8 |  |  |  |
Gain on sale of equity interest |  |  |  | $ 14.5 | £ 9.0 |

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