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UNCONSOLIDATED AFFILIATES AND COST METHOD INVESTMENT (Company Investments) (Details) - entity	Dec. 31, 2017	Nov. 30, 2017	Sep. 30, 2017
Schedule of Equity Method Investments [Line Items]
Number of entities - equity method of accounting (entity)	17
Governor’s Square Company
Schedule of Equity Method Investments [Line Items]
Joint venture, ownership percentage	47.50%
Parent Company | Ambassador Infrastructure, LLC
Schedule of Equity Method Investments [Line Items]
Joint venture, ownership percentage	65.00%
Parent Company | Ambassador Town Center JV, LLC
Schedule of Equity Method Investments [Line Items]
Joint venture, ownership percentage	65.00%
Parent Company | CBL/T-C, LLC
Schedule of Equity Method Investments [Line Items]
Joint venture, ownership percentage	50.00%
Parent Company | CBL-TRS Joint Venture, LLC
Schedule of Equity Method Investments [Line Items]
Joint venture, ownership percentage	50.00%
Parent Company | EastGate Storage, LLC
Schedule of Equity Method Investments [Line Items]
Joint venture, ownership percentage	50.00%	50.00%
Parent Company | El Paso Outlet Outparcels, LLC
Schedule of Equity Method Investments [Line Items]
Joint venture, ownership percentage	50.00%
Parent Company | Fremaux Town Center JV, LLC
Schedule of Equity Method Investments [Line Items]
Joint venture, ownership percentage	65.00%
Parent Company | G&I VIII CBL Triangle LLC
Schedule of Equity Method Investments [Line Items]
Joint venture, ownership percentage	10.00%
Parent Company | Governor’s Square IB
Schedule of Equity Method Investments [Line Items]
Joint venture, ownership percentage	50.00%
Parent Company | Kentucky Oaks Mall Company
Schedule of Equity Method Investments [Line Items]
Joint venture, ownership percentage	50.00%
Parent Company | Mall of South Carolina L.P.
Schedule of Equity Method Investments [Line Items]
Joint venture, ownership percentage	50.00%
Parent Company | Mall of South Carolina Outparcel L.P.
Schedule of Equity Method Investments [Line Items]
Joint venture, ownership percentage	50.00%
Parent Company | Port Orange I, LLC
Schedule of Equity Method Investments [Line Items]
Joint venture, ownership percentage	50.00%
Parent Company | Shoppes at Eagle Point, LLC
Schedule of Equity Method Investments [Line Items]
Joint venture, ownership percentage	50.00%		50.00%
Parent Company | West Melbourne I, LLC
Schedule of Equity Method Investments [Line Items]
Joint venture, ownership percentage	50.00%
Parent Company | York Town Center, LP
Schedule of Equity Method Investments [Line Items]
Joint venture, ownership percentage	50.00%

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

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