Earnings (Loss) per Share - Calculation of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Calculation of basic earnings (loss) per share:
Net income (loss) applicable to common stock	$ 418.7	$ (669.5)	$ 43.9
Weighted-average common shares outstanding - basic (in shares)	158.7	134.0	115.7
Basic earnings (loss) per share (in dollars per share)	$ 2.64	$ (5.00)	$ 0.38
Calculation of diluted earnings (loss) per share:
Net income (loss) applicable to common stock	$ 418.7	$ (669.5)	$ 43.9
Interest on Convertible Debt, Net of Tax	17.0	0.0	0.0
Diluted income applicable to common stock	$ 435.7	$ (669.5)	$ 43.9
Weighted-average common shares outstanding - diluted (in shares)	175.5	134.0	117.8
Diluted earnings (loss) per share (in dollars per share)	$ 2.48	$ (5.00)	$ 0.37
Effective tax rate	22.00%	19.80%	49.90%
Penn National Gaming Shares
Calculation of basic earnings (loss) per share:
Weighted-average common shares outstanding - basic (in shares)	158.6	134.0	115.7
Exchangeable Shares
Calculation of basic earnings (loss) per share:
Weighted-average common shares outstanding - basic (in shares)	0.1	0.0	0.0
Convertible Notes
Calculation of diluted earnings (loss) per share:
Effective tax rate	22.00%