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INVESTMENT PROPERTIES - Valuation of Investment Properties (Details) - Commercial properties
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Discounted cash flow | Core Office    
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]    
Discount rate (percent) 6.80% 6.50%
Terminal capitalization rate (percent) 5.40% 5.30%
Investment horizon (yrs.) 11 years 11 years
Discounted cash flow | Core Retail    
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]    
Discount rate (percent) 7.20% 7.00%
Terminal capitalization rate (percent) 5.30% 5.30%
Investment horizon (yrs.) 10 years 10 years
Discounted cash flow | LP Investments    
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]    
Discount rate (percent) 9.10% 9.40%
Terminal capitalization rate (percent) 6.30% 7.00%
Investment horizon (yrs.) 8 years 8 years
Direct capitalization | Multifamily and Manufactured Housing    
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]    
Implied capitalization rate 4.30% 4.30%