Property and Equipment (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Prior Period Reclassification Adjustment	$ 73
Property, Plant and Equipment, Gross	18,802	$ 18,287
Less: accumulated depreciation	(2,773)	(2,133)
Total property and equipment, net	16,029	16,154	[1]
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	4,871	4,857
Land, Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	12,157	11,824
Furniture, fixtures, and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	1,530	1,277
Construction in progress
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 244	$ 329

[1] The conditions that were considered prohibited forms of continuing involvement related to our sale of the Golf Course Properties (see Note 8) are no longer considered continuing involvement under the new revenue recognition standard. As of result of adopting the new standard on a full retrospective basis, we are now reflecting this transaction as a completed sale in the period in which it occurred.