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Operating Real Estate - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Real Estate [Line Items]          
Depreciation $ 9.5 $ 15.1 $ 19.3 $ 30.0  
Impairment loss     13.0 $ 0.8  
Building and Building Improvements          
Real Estate [Line Items]          
Accumulated impairment $ 162.7   $ 162.7   $ 149.7