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ORGANIZATION - Narrative (Details) | 12 Months Ended
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Dec. 31, 2020 state subsidiary unitholder shares | Dec. 31, 2019 unitholder shares | Dec. 31, 2018 unitholder 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 | subsidiary | 36 |  |
Number of holders of common units who received cash for their units (unitholder) | unitholder |  | 1 | 2
Redeemable noncontrolling interest, units exercised for conversion (shares) |  | 72,592 | 526,510
Operating Partnership |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Redeemable noncontrolling interest, shares issued upon exercise of common units (shares) | 20,956,110 | 611,847 | 915,338
Number of holders of common units who received cash for their units (unitholder) | unitholder | 31 | 2 | 1
Redeemable noncontrolling interest, units exercised for conversion (shares) | 20,956,110 | 611,847 | 915,338
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) | 20,100,000 |  |
Interest of CBL's Predecessor in Operating Partnership (as a percent) | 10.20% |  |
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 | subsidiary | 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% |  |

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