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Commitments and Contingencies (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 13, 2022
Sep. 30, 2022
Sep. 30, 2022
San Antonio Center      
Commitments [Line Items]      
Gain on tenant costs associated with property sold under threat of condemnation   $ 9.3 $ 9.3
Tenant settlement payments incurred     2.9
Estimated Litigation Liability   $ 20.1 $ 20.1
Plaza El Segundo | Redeemable Noncontrolling Interests      
Commitments [Line Items]      
Redeemable noncontrolling interest purchased 21.80%    
Payments for repurchase of redeemable noncontrolling interest $ 23.6    
Ownership interest subsequent to redemption 100.00%    
downREIT OP units      
Commitments [Line Items]      
downREIT operating partnership units, outstanding   652,233 652,233
downREIT operating partnership units outstanding, fair value   $ 58.8 $ 58.8