Discontinued Operations Discontinued Operations - Major Class of Assets and Liabilities Held for Sale (Details) - USD ($) $ in Millions	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Current assets:
Current assets of discontinued operations held for sale	$ 0.0	$ 69.8	$ 69.1
Long-term assets of discontinued operations held for sale	0.0		823.4
Current liabilities:
Current liabilities of discontinued operations held for sale	0.0	149.4	188.2
Non-current liabilities of discontinued operations held for sale	$ 0.0	$ 60.3	54.8
Big Fish Games | Discontinued Operations, Held-for-sale
Current assets:
Cash and cash equivalents			2.6
Accounts receivable			42.9
Game software development, net			6.9
Other current assets			16.7
Current assets of discontinued operations held for sale			69.1
Property and equipment, net			16.4
Game software development, net			13.5
Goodwill			530.7
Other intangible assets, net			238.8
Other assets			24.0
Long-term assets of discontinued operations held for sale			823.4
Total assets			892.5
Current liabilities:
Accounts payable			5.5
Accrued expense			35.0
Deferred revenue			85.1
Big Fish Games deferred payment			28.4
Big Fish Games earnout liability			34.2
Current liabilities of discontinued operations held for sale			188.2
Deferred income taxes			47.6
Other liabilities			7.2
Non-current liabilities of discontinued operations held for sale			54.8
Total liabilities			$ 243.0