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INVESTMENT PROPERTIES - Sensitivity Analysis (Details) - Property
$ in Millions
12 Months Ended
Dec. 31, 2022
USD ($)
DR  
Disclosure of fair value measurement of assets [line items]  
Impact of +25bps DR or +25bps TCR $ 1,628
TCR  
Disclosure of fair value measurement of assets [line items]  
Impact of +25bps DR or +25bps TCR 1,980
DR and TCR, or ICR  
Disclosure of fair value measurement of assets [line items]  
Impact of +25bps DR and +25bps TCR or +25bps ICR 3,568
Core Office | DR  
Disclosure of fair value measurement of assets [line items]  
Impact of +25bps DR or +25bps TCR 487
Core Office | TCR  
Disclosure of fair value measurement of assets [line items]  
Impact of +25bps DR or +25bps TCR 732
Core Office | DR and TCR, or ICR  
Disclosure of fair value measurement of assets [line items]  
Impact of +25bps DR and +25bps TCR or +25bps ICR 1,199
Core Retail | DR  
Disclosure of fair value measurement of assets [line items]  
Impact of +25bps DR or +25bps TCR 384
Core Retail | TCR  
Disclosure of fair value measurement of assets [line items]  
Impact of +25bps DR or +25bps TCR 643
Core Retail | DR and TCR, or ICR  
Disclosure of fair value measurement of assets [line items]  
Impact of +25bps DR and +25bps TCR or +25bps ICR 1,012
LP Investments | DR  
Disclosure of fair value measurement of assets [line items]  
Impact of +25bps DR or +25bps TCR 757
LP Investments | TCR  
Disclosure of fair value measurement of assets [line items]  
Impact of +25bps DR or +25bps TCR 605
LP Investments | DR and TCR, or ICR  
Disclosure of fair value measurement of assets [line items]  
Impact of +25bps DR and +25bps TCR or +25bps ICR $ 1,357