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Leases Lessee Disclosure - Narrative
$ in Millions
Sep. 30, 2019
USD ($)
real_estate_leases
Lessee, Lease, Description [Line Items]  
Lessee, Liability, Payments, Remainder of Fiscal Year | $ $ 33
Real estate leases  
Lessee, Lease, Description [Line Items]  
Number of real estate leases | real_estate_leases 1,100
Real estate leases | Minimum  
Lessee, Lease, Description [Line Items]  
Lessee, Operating Lease, Term of Contract 1 year
Brokerage sales offices | Minimum  
Lessee, Lease, Description [Line Items]  
Lessee, Operating Lease, Term of Contract 1 year
Real estate leases | Maximum  
Lessee, Lease, Description [Line Items]  
Lessee, Operating Lease, Term of Contract 17 years
Brokerage sales offices | Maximum  
Lessee, Lease, Description [Line Items]  
Lessee, Operating Lease, Term of Contract 5 years
Short-term lease | Maximum  
Lessee, Lease, Description [Line Items]  
Lessee, Operating Lease, Term of Contract 12 months