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Organization and Basis of Presentation - Narrative (Details)
shares in Millions
 3 Months Ended
Mar. 31, 2021
state
subsidiary
shares
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]  
Number of states in which entity operates | state 24
Number of wholly owned subsidiaries 36
Consolidated Properties  
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]  
Non-controlling limited partner interest ownership of CBL's Predecessor in the Operating Partnership (as a percent) 2.50%
Common stock owned by CBL's Predecessor (shares) | shares 20.0
Total effective interest of CBL's Predecessor in Operating Partnership (as a percent) 10.00%
Consolidated Properties | CBL Holdings  
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]  
Ownership interest in qualified subsidiaries (as a percent) 100.00%
CBL & Associates Limited Partnership  
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]  
Number of wholly owned subsidiaries 2
Combined ownership by the subsidiaries in operating partnership (as a percent) 97.50%
CBL & Associates Limited Partnership | CBL Associates Properties Inc  
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]  
Ownership of the sole general partner in partnership (as a percent) 1.00%
Limited partnership interest owned by CBL Holdings II, Inc. in the operating partnership (as a percent) 96.50%