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Compass Concierge Receivables and Allowance for Credit Losses - Summary of ACL for Concierge Receivables (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]    
Beginning of period $ 16.1 $ 17.3
Allowances 0.8 1.6
Net write-offs and other (0.6) (2.6)
End of period $ 16.3 $ 16.3