v3.26.1
Segment Information - Schedule of Reconciliation to Net Income (Loss) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]        
Revenue $ 4,306 $ 2,060 $ 7,010 $ 3,416
Commissions and other related expenses 3,254 1,686 5,262 2,791
Sales and marketing 108 61 205 119
Operations and support 429 145 827 277
Technology and development 109 63 228 113
General and administrative 93 34 174 61
Equity in income of unconsolidated entities (10) (2) (15) (3)
Unallocated corporate expenses (153) (55) (298) (106)
Stock-based compensation (38) (55) (85) (86)
Depreciation and amortization (153) (29) (316) (58)
Restructuring costs (2) (3) (8) (12)
Anywhere merger transaction and integration costs (34) 0 (217) 0
Litigation charge     (7)  
Other acquisition-related expenses (2) 3 (3) 3
Investment income 4 1 8 2
Interest expense (41) (3) (78) (5)
Income tax (expense) benefit (5) 0 396 3
Net income (loss) attributable to Compass, Inc. 92 39 114 (12)
Income Statement Location [Axis]: comp:TechnologyAndDevelopmentExpense        
Segment Reporting [Line Items]        
Unallocated corporate expenses (82) (34) (166) (66)
Stock-based compensation (13) (25) (32) (38)
Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense        
Segment Reporting [Line Items]        
Unallocated corporate expenses (68) (20) (124) (39)
Stock-based compensation (13) (11) (25) (17)
Income Statement Location [Axis]: us-gaap:OtherCostAndExpenseOperating        
Segment Reporting [Line Items]        
Unallocated corporate expenses (3) (1) (8) (1)
Stock-based compensation (8) (10) (18) (15)
Income Statement Location [Axis]: us-gaap:OtherSellingAndMarketingExpense        
Segment Reporting [Line Items]        
Stock-based compensation (4) (9) (9) (16)
Income Statement Location [Axis]: us-gaap:SalesCommissionsAndFees        
Segment Reporting [Line Items]        
Stock-based compensation 0 0 (1) 0
Operating Segments        
Segment Reporting [Line Items]        
Revenue 4,306 2,060 7,010 3,416
Segment Adjusted EBITDA 516 180 722 247
Operating Segments | Brokerage        
Segment Reporting [Line Items]        
Revenue 3,960 2,013 6,427 3,341
Commissions and other related expenses 3,254 1,686 5,261 2,791
Sales and marketing 88 50 167 99
Operations and support 229 108 453 214
Technology and development 7 4 15 7
General and administrative 6 2 9 4
Equity in income of unconsolidated entities (1) 0 (2) 0
Segment Adjusted EBITDA 377 163 524 226
Operating Segments | Franchise        
Segment Reporting [Line Items]        
Revenue 135 8 225 14
Commissions and other related expenses 0 0 0 0
Sales and marketing 10 1 17 2
Operations and support 32 4 63 6
Technology and development 5 0 11 1
General and administrative 1 0 1 0
Equity in income of unconsolidated entities 0 0 0 0
Segment Adjusted EBITDA 87 3 133 5
Operating Segments | Integrated Services        
Segment Reporting [Line Items]        
Revenue 211 39 358 61
Commissions and other related expenses 0 0 0 0
Sales and marketing 6 1 12 2
Operations and support 155 25 282 44
Technology and development 2 0 4 1
General and administrative 5 1 8 1
Equity in income of unconsolidated entities (9) (2) (13) (3)
Segment Adjusted EBITDA $ 52 $ 14 $ 65 $ 16