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Leases Lessee Disclosure - Narrative (Details) | Dec. 31, 2020 real_estate_leases
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Real estate leases |
Lessee, Lease, Description [Line Items] |
Number of real estate leases | 1,200
Real estate leases | Maximum |
Lessee, Lease, Description [Line Items] |
Brokerage sales offices | 17 years
Real estate leases | Minimum |
Lessee, Lease, Description [Line Items] |
Brokerage sales offices | 1 year
Brokerage sales offices | Maximum |
Lessee, Lease, Description [Line Items] |
Brokerage sales offices | 5 years
Brokerage sales offices | Minimum |
Lessee, Lease, Description [Line Items] |
Brokerage sales offices | 1 year
Short-term lease | Maximum |
Lessee, Lease, Description [Line Items] |
Brokerage sales offices | 12 months

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- Definition Number of real estate leases + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
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- Details
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- Details
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- Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |