Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 182.0	$ 7.3
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	13.8	24.5
Game software development amortization	0.4	4.4
Gain on sale of Big Fish Games	(219.5)	0.0
Distributed earnings from equity investments	4.5	4.3
Earnings from equity investments, net	(6.5)	(6.1)
Stock-based compensation	6.1	4.9
Deferred income taxes	2.1	0.0
Big Fish Games earnout payment	(2.4)	(2.5)
Big Fish Games deferred payment	(2.0)	0.0
Other	0.9	0.5
Increase (decrease) in cash resulting from changes in operating assets and liabilities, net of business acquisitions and dispositions:
Game software development	(0.3)	(5.3)
Income taxes	52.4	6.6
Deferred revenue	35.8	42.4
Other assets and liabilities	(11.4)	(15.7)
Net cash provided by operating activities	55.9	65.3
Cash flows from investing activities:
Capital maintenance expenditures	(7.5)	(10.2)
Capital project expenditures	(26.5)	(27.3)
Proceeds from sale of Big Fish Games	970.7	0.0
Receivable from escrow	0.0	10.1
Investment in unconsolidated affiliates	0.0	(24.0)
Net cash provided by (used in) investing activities	936.7	(51.4)
Cash flows from financing activities:
Borrowings on bank line of credit	100.9	239.1
Repayments of bank line of credit	(343.9)	(192.7)
Big Fish Games earnout payment	(31.8)	(31.7)
Big Fish Games deferred payment	(26.4)	0.0
Payment of dividends	(23.7)	(21.8)
Repurchase of common stock	(514.4)	(8.6)
Common stock issued	0.0	0.1
Other	(4.5)	(1.4)
Net cash used in financing activities	(843.8)	(17.0)
Net increase (decrease) in cash, cash equivalents and restricted cash	148.8	(3.1)
Effect of exchange rate changes on cash	(0.1)	0.0
Cash, cash equivalents and restricted cash, beginning of period	85.5	83.0
Cash, cash equivalents and restricted cash, end of period	234.2	79.9
Cash paid during the period for:
Interest	4.6	2.6
Income taxes	0.2	0.3
Schedule of non-cash investing and financing activities:
Property and equipment additions included in accounts payable and accrued expenses	$ 6.3	$ 0.0