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Combined Guarantor Subsidiaries - Contingencies - Narrative (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2020
Condensed Financial Statements Captions [Line Items] |  |
Environmental liability insurance, maximum coverage per incident (up to) |  | $ 10,000,000
Environmental liability insurance, annual coverage limit (up to) |  | 50,000,000
Guarantor Subsidiaries |  |
Condensed Financial Statements Captions [Line Items] |  |
Receivables related to credits to current tenants | $ 1,264,000 |
Environmental liability insurance, maximum coverage per incident (up to) |  | 10,000,000
Environmental liability insurance, annual coverage limit (up to) |  | $ 50,000,000

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- Definition Annual coverage limit provided by the insurance arrangement for environmental liability claims. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Environmental Liability Insurance, Maximum Coverage Per Incident + References No definition available. + Details
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Namespace Prefix: | cbl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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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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Data Type: | xbrli:stringItemType
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- Definition Amount awarded from other party in judgment or settlement of litigation. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Details
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