Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income	$ 137.2	$ 352.8	$ 140.5
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	96.4	63.6	97.1
Equity in income of unconsolidated affiliates	(50.6)	(29.6)	(25.5)
Distributions from unconsolidated affiliates	38.1	19.8	18.0
Stock-based compensation	23.8	21.1	27.1
Deferred income taxes	31.5	36.5	(65.0)
Amortization of operating lease assets	4.6
Loss on impairment of assets	0.0	0.0	21.7
Loss on extinguishment of debt	0.0	0.0	20.7
Gain on Ocean Downs/Saratoga transaction	0.0	(54.9)	0.0
Gain on sale of Big Fish Games	0.0	(219.5)	0.0
Game software development amortization	0.0	0.4	17.5
Other	2.8	(1.6)	(0.6)
Changes in operating assets and liabilities, net of businesses acquired and dispositions:
Game software development	0.0	(0.3)	(22.1)
Income taxes	2.5	13.8	(27.4)
Deferred revenue	(9.3)	(10.3)	17.2
Other assets and liabilities	12.6	6.0	(4.1)
Net cash provided by operating activities	289.6	197.8	215.1
Cash flows from investing activities:
Capital maintenance expenditures	(48.3)	(29.6)	(33.3)
Capital project expenditures	(82.9)	(119.8)	(83.6)
Acquisition of businesses, net of cash acquired	(206.6)	13.1	(24.2)
Investments in and advances to unconsolidated affiliates	(410.1)	0.0	(24.0)
Acquisition of other intangible assets	(32.1)	0.0	0.0
Proceeds from sale of Big Fish Games	0.0	970.7	0.0
Receivable from escrow	0.0	0.0	13.6
Other	(1.2)	(10.3)	(2.1)
Net cash (used in) provided by investing activities	(781.2)	824.1	(153.6)
Cash flows from financing activities:
Proceeds from borrowings under long-term debt obligations	1,236.3	135.0	2,050.4
Repayments of borrowings under long-term debt obligations	(640.3)	(381.0)	(1,835.8)
Payment of dividends	(22.2)	(23.7)	(21.5)
Repurchase of common stock	(95.0)	(531.4)	(180.9)
Taxes paid related to net share settlement of stock awards	(11.5)	(15.6)	(10.0)
Repayment of Ocean Downs debt	0.0	(54.7)	0.0
Big Fish Games earnout and deferred payments	0.0	(58.2)	(31.8)
Call premium on 2021 Senior Notes	0.0	0.0	(16.1)
Debt issuance costs	(8.9)	(0.8)	(14.4)
Other	2.4	(2.9)	0.6
Net cash provided by (used in) financing activities	460.8	(933.3)	(59.5)
Net (decrease) increase in cash, cash equivalents and restricted cash	(30.8)	88.6	2.0
Effect of exchange rate changes on cash	0.0	(0.8)	0.5
Cash, cash equivalents and restricted cash, beginning of year	173.3	85.5	83.0
Cash, cash equivalents and restricted cash, end of year	142.5	173.3	85.5
Supplemental disclosures of cash flow information:
Interest	61.7	31.1	47.5
Income taxes	23.5	48.6	75.9
Schedule of non-cash investing and financing activities:
Dividends payable	23.5	22.5	23.7
Deferred tax liability assumed from equity investment	103.2	0.0	0.0
Property and equipment additions included in accounts payable and accrued expense and other current liabilities	12.4	6.6	9.6
Repurchase of common stock in payment of income taxes on stock-based compensation included in accrued expense and other current liabilities	3.9	2.5	1.3
Repurchase of common stock included in accrued expense and other current liabilities	0.5	2.5	0.0
Acquisition of Ocean Downs, net of cash acquired	$ 0.0	$ 115.2	$ 0.0