Fair Value Of Assets And Liabilities - Schedule of Fair Value Measurements on a Recurring Basis (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents and restricted cash	$ 34.1	$ 30.1
Big Fish Games deferred payments	0.0	0.0
Big Fish Games earnout liability	0.0	0.0
Bluff contingent consideration liability		0.0
Total level one assets and liabilities	34.1	30.1
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents and restricted cash	0.0	0.0
Big Fish Games deferred payments	27.8	54.8
Big Fish Games earnout liability	67.9	345.2
Bluff contingent consideration liability	0.0	2.3
Total level three assets and liabilities	$ 95.7	$ 402.3