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Discontinued Operations - Change in Fair Value of Liabilities (Details) - Big Fish Games - Discontinued Operations, Held-for-sale $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
Balance as of December 31, 2017 | $ 62.6
Payments | (62.6)
Balance as of December 31, 2018 | 0.0
Deferred Payments |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
Balance as of December 31, 2017 | 28.4
Payments | (28.4)
Balance as of December 31, 2018 | 0.0
Earnout Liability |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
Balance as of December 31, 2017 | 34.2
Payments | (34.2)
Balance as of December 31, 2018 | $ 0.0

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