Inventory (Activity Related to Inventory Obligations) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Inventory [Line Items]
Total Inventory obligations, Beginning Balance		$ 83	$ 49
Purchases		44	42
Payments		(78)	(52)
Total Inventory obligations, Ending Balance		49	39
Las Vegas, Nevada Inventory Sales [Member]
Inventory [Line Items]
Inventory Sold Under Agreement to Repurchase, Repurchase Liability, Beginning Balance	[1]	13	43
Purchases	[1]	0	0
Payments	[1]	0	(19)
Inventory Sold Under Agreement to Repurchase, Repurchase Liability, Ending Balance	[1]	13	24
Moab
Inventory [Line Items]
Inventory Sold Under Agreement to Repurchase, Repurchase Liability, Beginning Balance	[1]	31	0
Purchases	[1]	25	0
Payments	[1]	(56)	0
Inventory Sold Under Agreement to Repurchase, Repurchase Liability, Ending Balance	[1]	0	0
Orlando
Inventory [Line Items]
Inventory Sold Under Agreement to Repurchase, Repurchase Liability, Beginning Balance	[1]	22	0
Purchases	[1]	0	0
Payments	[1]	0	0
Inventory Sold Under Agreement to Repurchase, Repurchase Liability, Ending Balance	[1]	22	0
Other Inventory Sales
Inventory [Line Items]
Other inventory obligations, Beginning Balance	[2]	17	6
Purchases	[2]	19	42
Payments	[2]	(22)	(33)
Other inventory obligations, Ending Balance	[2]	$ 14	$ 15

[1] Included in Accrued expenses and other liabilities on the Condensed Consolidated Balance Sheets.

[2] Included in Accounts payable on the Condensed Consolidated Balance Sheets.