Revenue Disaggregation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Total revenues	$ 1,511.8	$ 1,129.7	$ 4,332.5	$ 2,551.3
Gaming
Disaggregation of Revenue [Line Items]
Total revenues	1,256.2	993.6	3,643.7	2,155.7
Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	87.6	52.2	232.2	170.4
Hotel
Disaggregation of Revenue [Line Items]
Total revenues	67.7	38.7	169.2	108.4
Other
Disaggregation of Revenue [Line Items]
Total revenues	100.3	45.2	287.4	116.8
Operating Segments | Northeast
Disaggregation of Revenue [Line Items]
Total revenues	672.4	545.1	1,895.8	1,168.5
Operating Segments | Northeast | Gaming
Disaggregation of Revenue [Line Items]
Total revenues	616.2	508.0	1,745.7	1,060.8
Operating Segments | Northeast | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	28.0	15.8	73.0	51.9
Operating Segments | Northeast | Hotel
Disaggregation of Revenue [Line Items]
Total revenues	8.2	4.0	20.7	13.0
Operating Segments | Northeast | Other
Disaggregation of Revenue [Line Items]
Total revenues	20.0	17.3	56.4	42.8
Operating Segments | South
Disaggregation of Revenue [Line Items]
Total revenues	318.2	255.6	982.3	600.4
Operating Segments | South | Gaming
Disaggregation of Revenue [Line Items]
Total revenues	253.0	208.0	802.8	480.3
Operating Segments | South | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	28.7	19.8	81.2	57.1
Operating Segments | South | Hotel
Disaggregation of Revenue [Line Items]
Total revenues	26.8	20.6	70.5	45.2
Operating Segments | South | Other
Disaggregation of Revenue [Line Items]
Total revenues	9.7	7.2	27.8	17.8
Operating Segments | West
Disaggregation of Revenue [Line Items]
Total revenues	145.7	78.7	382.7	223.0
Operating Segments | West | Gaming
Disaggregation of Revenue [Line Items]
Total revenues	96.7	54.0	262.5	138.7
Operating Segments | West | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	19.5	9.9	49.6	35.6
Operating Segments | West | Hotel
Disaggregation of Revenue [Line Items]
Total revenues	23.9	9.0	56.3	36.3
Operating Segments | West | Other
Disaggregation of Revenue [Line Items]
Total revenues	5.6	5.8	14.3	12.4
Operating Segments | Midwest
Disaggregation of Revenue [Line Items]
Total revenues	285.7	229.1	815.2	493.2
Operating Segments | Midwest | Gaming
Disaggregation of Revenue [Line Items]
Total revenues	259.3	212.7	748.3	442.4
Operating Segments | Midwest | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	11.0	6.6	27.7	25.4
Operating Segments | Midwest | Hotel
Disaggregation of Revenue [Line Items]
Total revenues	8.8	5.1	21.7	13.9
Operating Segments | Midwest | Other
Disaggregation of Revenue [Line Items]
Total revenues	6.6	4.7	17.5	11.5
Other
Disaggregation of Revenue [Line Items]
Total revenues	96.5	23.7	282.1	71.6
Other | Gaming
Disaggregation of Revenue [Line Items]
Total revenues	31.0	11.0	84.4	33.7
Other | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	0.4	0.1	0.7	0.4
Other | Hotel
Disaggregation of Revenue [Line Items]
Total revenues	0.0	0.0	0.0	0.0
Other | Other
Disaggregation of Revenue [Line Items]
Total revenues	65.1	12.6	197.0	37.5
Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Total revenues	(6.7)	(2.5)	(25.6)	(5.4)
Intersegment Eliminations | Gaming
Disaggregation of Revenue [Line Items]
Total revenues	0.0	(0.1)	0.0	(0.2)
Intersegment Eliminations | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	0.0	0.0	0.0	0.0
Intersegment Eliminations | Hotel
Disaggregation of Revenue [Line Items]
Total revenues	0.0	0.0	0.0	0.0
Intersegment Eliminations | Other
Disaggregation of Revenue [Line Items]
Total revenues	$ (6.7)	$ (2.4)	$ (25.6)	$ (5.2)