Revenue Recognition Revenue Recognition - Receivables (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Loans and Leases Receivable Disclosure [Line Items]
Contract with Customer, Asset, Net	$ 301	$ 311
Accounts Receivable, Gross, Current	138	183
Receivables, net	439	494
Casino [Member]
Loans and Leases Receivable Disclosure [Line Items]
Contract with Customer, Asset, Net	144	173
Food and Beverage [Member]
Loans and Leases Receivable Disclosure [Line Items]
Contract with Customer, Asset, Net	81	59
Entertainment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Contract with Customer, Asset, Net	$ 76	$ 79