Segment Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) segment	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Aug. 01, 2021
Segment Reporting Information [Line Items]
Number of reportable segments | segment	5
Revenues:
Total	$ 5,905.0	$ 3,578.7	$ 5,301.4
Adjusted EBITDAR:
Adjusted EBITDAR	1,994.4	1,094.8	1,605.2
Rent expense associated with triple net operating lease	(454.4)	(419.8)	(366.4)
Stock-based compensation	(35.1)	(14.5)	(14.9)
Cash-settled stock-based awards variance	(1.2)	(67.2)	(0.8)
Gain (loss) on disposal of assets	(1.1)	29.2	(5.5)
Contingent purchase price	(1.9)	1.1	(7.0)
Pre-opening expenses	(5.4)	(11.8)	(22.3)
Depreciation and amortization	(344.5)	(366.7)	(414.2)
Impairment losses	0.0	(623.4)	(173.1)
Insurance recoveries, net of deductible charges	0.0	0.1	3.0
Non-operating items of equity method investments	(7.7)	(4.7)	(3.7)
Interest expense, net	(561.7)	(543.2)	(534.2)
Loss on early extinguishment of debt	0.0	(1.2)	0.0
Other	(42.3)	93.1	20.0
Income (loss) before income taxes	539.1	(834.2)	86.1
Income tax benefit (expense)	(118.6)	165.1	(43.0)
Net income (loss)	420.5	(669.1)	43.1
Capital expenditures:
Capital expenditures	244.1	137.0	190.6
Assets:
Investment in and advances to unconsolidated affiliates	255.1	266.8	128.3
Total assets	16,872.1	14,667.3	14,194.5
Sam Houston Race Park and Valley Race Park
Adjusted EBITDAR:
Business acquisition, percentage of voting interests acquired				50.00%
Operating segments | Northeast segment
Revenues:
Total	2,552.4	1,639.3	2,399.9
Adjusted EBITDAR:
Adjusted EBITDAR	848.4	478.9	720.8
Capital expenditures:
Capital expenditures	144.8	78.0	96.2
Assets:
Investment in and advances to unconsolidated affiliates	0.1	0.1	0.1
Total assets	2,283.6	1,958.4	2,273.7
Operating segments | South segment
Revenues:
Total	1,322.2	849.6	1,118.9
Adjusted EBITDAR:
Adjusted EBITDAR	587.0	318.9	369.8
Capital expenditures:
Capital expenditures	39.0	15.8	29.8
Assets:
Investment in and advances to unconsolidated affiliates	0.0	0.0	0.0
Total assets	1,224.6	1,165.4	1,397.0
Operating segments | West segment
Revenues:
Total	521.4	302.5	642.5
Adjusted EBITDAR:
Adjusted EBITDAR	195.0	82.2	198.8
Capital expenditures:
Capital expenditures	8.5	8.2	21.2
Assets:
Investment in and advances to unconsolidated affiliates	0.0	0.0	0.0
Total assets	394.8	401.5	752.1
Operating segments | Midwest segment
Revenues:
Total	1,102.7	681.4	1,094.5
Adjusted EBITDAR:
Adjusted EBITDAR	500.1	258.3	403.6
Capital expenditures:
Capital expenditures	19.8	15.1	32.7
Assets:
Investment in and advances to unconsolidated affiliates	83.8	85.2	90.9
Total assets	1,215.8	1,161.1	1,412.2
Operating segments | Interactive
Revenues:
Total	432.9	121.1	38.3
Adjusted EBITDAR:
Adjusted EBITDAR	(35.4)	37.2	11.6
Capital expenditures:
Capital expenditures	6.3	9.1	0.0
Assets:
Investment in and advances to unconsolidated affiliates	164.4	149.3	1.9
Total assets	2,618.3	434.1	124.1
Other
Revenues:
Total	10.6	3.9	9.2
Adjusted EBITDAR:
Adjusted EBITDAR	(100.7)	(80.7)	(99.4)
Capital expenditures:
Capital expenditures	25.7	10.8	10.7
Assets:
Investment in and advances to unconsolidated affiliates	6.8	32.2	35.4
Total assets	9,135.0	9,546.8	8,235.4
Intersegment eliminations
Revenues:
Total	$ (37.2)	$ (19.1)	$ (1.9)