Leases - Additional Information (Details) $ in Millions			3 Months Ended		9 Months Ended
	Apr. 28, 2016 facility extension_period	Nov. 01, 2013 facility extension_period	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)
Schedule of Leased Assets [Line Items]
Additional ROU asset and corresponding lease liability recognized					$ 713.3	$ 0.0
Variable expenses			$ 1.0		2.8
Lease payments			222.6	$ 115.2	645.4	347.0
Lease income			85.3		236.9
General and administrative expense
Schedule of Leased Assets [Line Items]
Variable expenses			0.2		0.8
Interest expense
Schedule of Leased Assets [Line Items]
Variable expenses			0.0		0.0
Penn Master Lease
Schedule of Leased Assets [Line Items]
Number of facilities with leased real estate | facility		19
Lease term		15 years
Number of options to extend lease | extension_period		4
Lease renewal term		5 years
Lease - expected term with renewal options		35 years
Adjusted annual escalator percentage		2.00%
Adjusted revenue to rent ratio		1.8
Period over which fixed component is adjusted		5 years
Adjustment to fixed component as percentage of the average change to net revenues during the preceding five years		4.00%
Adjustment to fixed component as percentage of the average change to net revenues during preceding month		20.00%
Percentage rent baseline period		5 years
Variable expenses			4.4	11.8	29.5	36.8
Penn Master Lease | Greektown Casino-Hotel
Schedule of Leased Assets [Line Items]
Additional ROU asset and corresponding lease liability recognized			151.2
Penn Master Lease | General and administrative expense
Schedule of Leased Assets [Line Items]
Variable expenses			2.3	0.0	15.4	0.0
Penn Master Lease | Interest expense
Schedule of Leased Assets [Line Items]
Variable expenses			$ 2.1	$ 11.8	$ 14.1	$ 36.8
Pinnacle Master Lease
Schedule of Leased Assets [Line Items]
Number of facilities with leased real estate | facility	12
Number of options to extend lease | extension_period	5
Lease renewal term	5 years
Lease - expected term with renewal options	32 years 6 months
Remaining lease term	7 years 6 months
Initial lease term	10 years
Annual escalator percentage - up to	2.00%
Adjusted Revenue to Rent Ratio, as defined	1.8
Percentage rent escalation interval	2 years
Percentage of average net revenues during preceding two years	4.00%
Percentage rent baseline period	2 years