XML 80 R54.htm IDEA: XBRL DOCUMENT v3.10.0.1
Property and Equipment (Schedule of Property and Equipment) (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 1,645 $ 1,657
Accumulated depreciation and amortization (1,058) (1,047)
Total property and equipment, net 587 610
Land    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 31 31
Buildings    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 235 228
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 135 158
Computer equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 1,047 1,073
Furniture, fixtures, and other equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 197 $ 167