Basis of Presentation and Principles of Consolidation - Assets and Liabilities Classified as Held for Sale (Details) - Disposal Group, Held-for-sale, Not Discontinued Operations $ in Millions	Sep. 30, 2019 USD ($)
Emerald Resort & Casino, South Africa Disposition
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	$ 5
Property and equipment, net	24
Goodwill	5
Intangible assets other than goodwill	10
Other	2
Assets held for sale	46
Current liabilities	4
Deferred credits and other liabilities	3
Liabilities held for sale included in Accrued expenses and other current liabilities	7
Rio All-Suite Hotel & Casino
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Property and equipment, net	505
Intangible assets other than goodwill	11
Fair value of assets held for sale	516
Estimated costs to sell	(6)
Assets held for sale	$ 510