v3.26.1
INVESTMENT PROPERTIES - Key Valuation Metrics for Investment Properties (Details) - Commercial properties - property
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Discounted cash flow | Office    
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]    
Discount rate 6.70% 6.70%
Terminal capitalization rate 5.40% 5.60%
Investment horizon (years) 10 years 11 years
Discounted cash flow | Retail    
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]    
Discount rate 7.00% 7.10%
Terminal capitalization rate 5.40% 5.40%
Investment horizon (years) 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 9.20% 9.30%
Terminal capitalization rate 6.80% 5.80%
Investment horizon (years) 9 years 8 years
Discounted cash flow | Premier office and mixed-use complexes    
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]    
Discount rate 6.70% 6.80%
Number of properties 16 16
Discounted cash flow | Core premier retail centers    
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]    
Discount rate 6.20% 6.20%
Income approach    
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]    
Implied capitalization rate 5.10% 5.20%