XML 72 R38.htm IDEA: XBRL DOCUMENT v3.19.3
Revenue (Disaggregation of Revenue) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Disaggregation of Revenue [Line Items]        
Reportable segment revenues $ 407 $ 377 $ 1,065 $ 979
Renewals [Member]        
Disaggregation of Revenue [Line Items]        
Reportable segment revenues 278 251 722 648
Real Estate [Member]        
Disaggregation of Revenue [Line Items]        
Reportable segment revenues 77 78 206 205
Direct To Consumer [Member]        
Disaggregation of Revenue [Line Items]        
Reportable segment revenues 50 47 131 122
Service, Other [Member]        
Disaggregation of Revenue [Line Items]        
Reportable segment revenues $ 2 $ 1 $ 6 $ 4