Acquisitions And New Ventures - Final Fair Value of Assets Acquired and Liabilities Assumed, Net of Cash Acquired (Details) - Big Fish Games $ in Millions	Dec. 16, 2014 USD ($)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable	$ 19.4
Income taxes receivable	18.1
Prepaid expense	9.7
Deferred income taxes	1.7
Other assets	1.8
Property and equipment	14.6
Goodwill	540.3
Other intangible assets	362.9
Total assets acquired	968.5
Accounts payable	9.1
Accrued expense	19.2
Income taxes payable	0.2
Deferred revenue	37.3
Deferred income taxes	96.2
Other liabilities	2.8
Total liabilities assumed	164.8
Purchase price, net of cash acquired	$ 803.7