Properties and Equipment, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 801	$ 772
Accumulated depreciation and amortization	(624)	(614)
Properties and equipment, net	177	158
Depreciation and amortization	43	44	$ 51
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	8	8
Buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	642	619
Furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 151	$ 145