Income Taxes - Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Statutory tax rate	21.00%	21.00%	35.00%
State taxes, net of federal tax benefit	2.50%	4.00%	5.20%
Valuation allowance	(9.90%)	(70.40%)	(17.10%)
Foreign income taxes	(1.30%)	2.30%	(0.10%)
Deferred tax benefit from changes in federal tax law	0.00%	(44.70%)	52.10%
Stock-based compensation	(1.80%)	4.70%	(0.20%)
Acquisition of CEOC	0.00%	0.00%	36.70%
Reserves for uncertain tax positions	0.50%	4.40%	(4.60%)
Current tax benefit from change in CGP operating agreement	0.00%	0.00%	2.40%
Impairment of goodwill	(0.30%)	4.70%	0.00%
Nondeductible transaction costs	0.00%	6.60%	(25.00%)
Other	(0.10%)	1.30%	(0.20%)
Effective tax rate	10.60%	(66.10%)	84.20%