Leases - Additional Information (Details) $ in Millions													3 Months Ended		10 Months Ended	12 Months Ended
	Oct. 01, 2020 USD ($) property	May 01, 2020 USD ($)	Apr. 16, 2020 USD ($) extension_period	Feb. 01, 2020 USD ($)	Nov. 01, 2019 USD ($)	May 23, 2019 USD ($) option	May 01, 2019 USD ($)	Jan. 01, 2019 option	Nov. 01, 2018 USD ($)	Sep. 09, 2016 USD ($) extension_period	Apr. 28, 2016 facility extension_period	Nov. 01, 2013	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Schedule of Leased Assets [Line Items]
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]													penn:LeaseRightOfUseAsset		penn:LeaseRightOfUseAsset	penn:LeaseRightOfUseAsset
Lease right-of-use assets													$ 4,817.7	$ 4,837.3	$ 4,817.7	$ 4,817.7	$ 4,837.3
Long-term portion of financing obligations													4,096.4	4,102.2	4,096.4	4,096.4	4,102.2
Rent expense																	58.1
Lease payments													891.1	869.8
Lease income																146.8		$ 163.6
Operating Lease, Liability													4,493.1		4,493.1	4,493.1
Total revenues																3,578.7	5,301.4	3,587.9
Tropicana Las Vegas
Schedule of Leased Assets [Line Items]
Lease right-of-use assets			$ 61.6
Sale of property in exchange for rent credits			$ 307.5												$ 307.5	337.5
Real estate sale, operating agreement term			2 years
Real estate sale, number of operating agreement extensions | extension_period			3
Real estate sale, operating agreement extension term			1 year
Morgantown
Schedule of Leased Assets [Line Items]
Sale of property in exchange for rent credits	$ 30.0															337.5
Lease term	20 years
Number of lease renewal options | property	6
Lease renewal term	5 years
Hotel
Schedule of Leased Assets [Line Items]
Total revenues																$ 146.8	$ 311.0	$ 163.6
Pinnacle Master Lease
Schedule of Leased Assets [Line Items]
Initial lease term											10 years
Lease renewal term											5 years
Annual rent reduction		$ 5.0
Lease right-of-use assets		14.9
Lease payments													326.9	328.6
Operating Lease, Liability		$ 14.9
Margaritaville Lease
Schedule of Leased Assets [Line Items]
Percentage rent baseline period								2 years
Increase in fixed component of rent resulting from annual escalator				$ 0.3
Operating lease, annual escalator, additional ROU asset recognized				3.1
Percentage rent escalation interval								2 years
Lease payments													23.5	23.1
Penn Master Lease
Schedule of Leased Assets [Line Items]
Lease payments													457.9	457.9
Greektown Lease
Schedule of Leased Assets [Line Items]
Percentage rent baseline period						2 years
Percentage rent escalation interval						2 years
Lease payments													$ 55.6	$ 33.8
Penn Master Lease
Schedule of Leased Assets [Line Items]
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%
Percentage rent baseline period												5 years
Adjustment to fixed component as percentage of the average change to net revenues during preceding month												20.00%
Increase in fixed component of rent resulting from annual escalator					$ 5.5				$ 5.4
Operating lease, annual escalator, additional ROU asset recognized					34.4
Finance lease, annual escalator, additional ROU asset recognized					$ 3.1
Annual rent reduction resulting from Penn Percentage Rent reset									$ 11.3
Operating lease, competition clause, additional ROU asset recognized						$ 151.2
Pinnacle Master Lease
Schedule of Leased Assets [Line Items]
Adjusted annual escalator percentage											2.00%
Percentage rent baseline period											2 years
Increase in fixed component of rent resulting from annual escalator							$ 1.0
Operating lease, annual escalator, additional ROU asset recognized							$ 3.8
Number of facilities with leased real estate | facility											12
Remaining lease term											7 years 6 months
Number of lease renewal terms | extension_period											5
Lease - expected term with renewal options											32 years 6 months
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%
Morgantown Lease
Schedule of Leased Assets [Line Items]
Adjusted annual escalator percentage	1.50%
Percentage rent escalation interval	3 years
Sale of property in exchange for rent credits	$ 30.0
Annual rent	$ 3.0
Lessee annual escalator consisting	1.25%
Consumer price index greater or less than	0.50%
Long-term portion of financing obligations	$ 30.0
Meadows Lease
Schedule of Leased Assets [Line Items]
Adjusted annual escalator percentage										5.00%
Increase in fixed component of rent resulting from annual escalator				0.8
Operating lease, annual escalator, additional ROU asset recognized	17.1			$ 4.3
Initial lease term										10 years
Percentage rent escalation interval																2 years
Annual rent reduction	$ 2.1
Operating lease, remaining lease term										8 years
Operating lease, sum of base rant and percentage rent threshold										$ 31.0
Operating lease, annual escalator after initial term or threshold										2.00%
Operating lease, adjusted rent to revenue ratio										2.0
Operating lease, percentage of average annual net revenues during the preceding two years										4.00%
Annual net revenues Term of property										2 years
Meadows Lease | Lease renewal option one
Schedule of Leased Assets [Line Items]
Lease renewal term										5 years
Number of lease renewal options | extension_period										3
Meadows Lease | Lease renewal option two
Schedule of Leased Assets [Line Items]
Lease renewal term																4 years
Number of lease renewal options | extension_period										1
Margaritaville Lease
Schedule of Leased Assets [Line Items]
Adjusted annual escalator percentage								2.00%
Lease renewal term								5 years
Operating lease, term								15 years
Number of lease renewal options | option								4
Operating lease, adjusted rent to revenue ratio				6.1				1.9
Operating lease, percentage of average annual net revenues during the preceding two years								4.00%
Greektown Lease
Schedule of Leased Assets [Line Items]
Adjusted annual escalator percentage						2.00%
Lease renewal term						5 years
Operating lease, term						15 years
Number of lease renewal options | option						4
Operating lease, adjusted rent to revenue ratio						1.85
Operating lease, percentage of average annual net revenues during the preceding two years						4.00%