Segment Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($) segment	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Aug. 01, 2021
Segment Reporting Information [Line Items]
Number of reportable segments | segment	5
Revenues:
Revenues	$ 1,564.2	$ 1,274.9
Adjusted EBITDAR:
Adjusted EBITDAR	494.7	447.0
Rent expense associated with triple net operating leases	(60.1)	(110.4)
Stock-based compensation	(17.0)	(4.2)
Cash-settled stock-based awards variance	2.9	(21.5)
Gain on disposal of assets	0.1	0.1
Contingent purchase price	0.1	(0.1)
Pre-opening expenses	(1.5)	(1.6)
Depreciation and amortization	(118.2)	(81.3)
Insurance recoveries, net of deductible charges	8.8	0.0
Non-operating items of equity method investments	(1.8)	(1.6)
Interest expense, net	(160.8)	(135.7)
Other	(48.0)	20.8
Income before income taxes	99.2	111.5
Income tax expense	(47.6)	(20.6)
Net income	51.6	90.9
Capital expenditures:
Capital expenditures	65.6	25.7
Assets:
Investment in and advances to unconsolidated affiliates	256.2		$ 255.1
Total assets	18,071.1		16,872.1
Sam Houston Race Park and Valley Race Park
Adjusted EBITDAR:
Business acquisition, percentage of voting interests acquired				50.00%
Operating segments | Northeast
Revenues:
Revenues	658.5	570.9
Adjusted EBITDAR:
Adjusted EBITDAR	205.2	193.2
Capital expenditures:
Capital expenditures	30.6	15.4
Assets:
Investment in and advances to unconsolidated affiliates	0.1		0.1
Total assets	2,249.7		2,283.6
Operating segments | South
Revenues:
Revenues	341.4	295.9
Adjusted EBITDAR:
Adjusted EBITDAR	146.5	133.9
Capital expenditures:
Capital expenditures	19.7	1.8
Assets:
Investment in and advances to unconsolidated affiliates	0.0		0.0
Total assets	1,163.1		1,224.6
Operating segments | West
Revenues:
Revenues	140.9	96.6
Adjusted EBITDAR:
Adjusted EBITDAR	51.2	35.2
Capital expenditures:
Capital expenditures	1.8	3.2
Assets:
Investment in and advances to unconsolidated affiliates	0.0		0.0
Total assets	382.6		394.8
Operating segments | Midwest
Revenues:
Revenues	282.9	234.7
Adjusted EBITDAR:
Adjusted EBITDAR	125.5	106.0
Capital expenditures:
Capital expenditures	1.1	0.8
Assets:
Investment in and advances to unconsolidated affiliates	83.4		83.8
Total assets	1,401.9		1,215.8
Operating segments | Interactive
Revenues:
Revenues	141.5	86.3
Adjusted EBITDAR:
Adjusted EBITDAR	(10.0)	1.3
Capital expenditures:
Capital expenditures	6.8	1.9
Assets:
Investment in and advances to unconsolidated affiliates	166.0		164.4
Total assets	2,567.6		2,618.3
Other
Revenues:
Revenues	7.3	1.6
Adjusted EBITDAR:
Adjusted EBITDAR	(23.7)	(22.6)
Capital expenditures:
Capital expenditures	5.6	2.6
Assets:
Investment in and advances to unconsolidated affiliates	6.7		6.8
Total assets	10,306.2		$ 9,135.0
Intersegment eliminations
Revenues:
Revenues	$ (8.3)	$ (11.1)