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Basis Of Presentation Restructuring Charges (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Restructuring Charges [Abstract]        
Restructuring costs, net [1] $ 16 $ 4 $ 23 $ 14
Restructuring Cost and Reserve [Line Items]        
Restructuring costs, net [1] 16 4 23 14
Operational Efficiencies Program        
Restructuring Charges [Abstract]        
Restructuring costs, net 6 4 13 14
Restructuring and Related Cost, Expected Cost 166   166  
Restructuring Cost and Reserve [Line Items]        
Restructuring costs, net 6 $ 4 13 $ 14
Restructuring and Related Cost, Expected Cost 166   166  
Restructuring and Related Cost, Expected Cost Remaining 24   24  
Restructuring and Related Cost, Cost Incurred to Date 142   142  
2022 Restructuring Program        
Restructuring Charges [Abstract]        
Restructuring costs, net 10      
Restructuring and Related Cost, Expected Cost 15   15  
Restructuring Cost and Reserve [Line Items]        
Restructuring costs, net 10      
Restructuring and Related Cost, Expected Cost 15   $ 15  
2022 Restructuring Program | Facility Related        
Restructuring Charges [Abstract]        
Restructuring costs, net 3      
Restructuring Cost and Reserve [Line Items]        
Restructuring costs, net 3      
2022 Restructuring Program | Personnel Related        
Restructuring Charges [Abstract]        
Restructuring costs, net 7      
Restructuring Cost and Reserve [Line Items]        
Restructuring costs, net $ 7      
[1]
(b)The three months ended September 30, 2022 includes restructuring charges of $2 million at Franchise Group, $8 million at Owned Brokerage Group and $6 million at Corporate and Other.
The three months ended September 30, 2021 includes restructuring charges of $1 million at Franchise Group, $2 million at Owned Brokerage Group and $1 million at Corporate and Other.
The nine months ended September 30, 2022 includes restructuring charges of $4 million at Franchise Group, $11 million at Owned Brokerage Group and $8 million at Corporate and Other.
The nine months ended September 30, 2021 includes restructuring charges of $4 million at Franchise Group, $6 million at Owned Brokerage Group and $4 million at Corporate and Other.