Properties and Equipment, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 726	$ 706
Accumulated depreciation and amortization	(496)	(459)
Properties and equipment, net	230	247
Depreciation and amortization	$ 59	58	$ 59
Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	3 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	40 years
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	$ 578	559
Buildings and improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	10 years
Buildings and improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	40 years
Furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 140	$ 139
Furniture and equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	3 years
Furniture and equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	30 years