v3.26.1
SEGMENT REPORTING - Summarized EBITDA Information by Operating Segment (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Segment Reporting Information [Line Items]    
Revenue $ 897 $ 732
Personnel 410 342
Marketing 227 216
General and administrative 179 175
EBITDA 81 (1)
Stock-based compensation expense 42 30
Acquisition and integration related costs 7 22
Restructuring and related costs 2 7
Settlements and impairments 0 8
Adjusted EBITDA 132 66
Operating Segments    
Segment Reporting Information [Line Items]    
EBITDA 81 (1)
Acquisition and integration related costs  
Restructuring and related costs  
Settlements and impairments  
Adjusted EBITDA  
Operating Segments | Commercial Real Estate    
Segment Reporting Information [Line Items]    
Revenue 472 409
Personnel 232 190
Marketing 18 17
General and administrative 95 99
EBITDA 127 103
Stock-based compensation expense 29 22
Acquisition and integration related costs 4 20
Restructuring and related costs 1 5
Settlements and impairments 0 1
Adjusted EBITDA 161 151
Operating Segments | Residential Real Estate    
Segment Reporting Information [Line Items]    
Revenue 425 323
Personnel 178 152
Marketing 209 199
General and administrative 84 76
EBITDA (46) (104)
Stock-based compensation expense 13 8
Acquisition and integration related costs 3 2
Restructuring and related costs 1 2
Settlements and impairments 0 7
Adjusted EBITDA $ (29) $ (85)