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Organization and Basis of Presentation - Interest Held in Properties (Details)	Mar. 31, 2019 other_property mall
Consolidated Properties
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Redevelopments, Malls | mall	6
Redevelopments, All Other | other_property	0
Unconsolidated Properties
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Redevelopments, Malls | mall	1
Redevelopments, All Other | other_property	0

X

- Definition

Number Of Other Properties Under Redevelopment

+ References

No definition available.

+ Details

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Balance Type:	na
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X

- Definition

Number of Malls Under Redevelopment

+ References

No definition available.

+ Details

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Namespace Prefix:	cbl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- 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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X

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_ParentMember
Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_NoncontrollingInterestMember
Namespace Prefix:
Data Type:	na
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Period Type: