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GOODWILL - Narrative (Details) - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Nov. 22, 2022
Goodwill [Line Items]        
Disposal Group, Including Discontinued Operation, Intangible Assets $ 170,000,000     $ 170,000,000
Impairment loss 0 $ 0    
Goodwill, Other Increase (Decrease) 257,000,000      
CarVal Acquisition        
Goodwill [Line Items]        
Goodwill acquired during year 666,000,000      
Alliance Bernstein        
Goodwill [Line Items]        
Amortization of intangible assets 43,000,000 21,000,000 $ 37,000,000  
Increase (decrease) in derivative assets 496,000,000      
Gross carrying amount of AllianceBernstein related intangible assets 1,200,000,000 932,000,000    
Accumulated amortization of these intangible assets (853,000,000) 809,000,000    
Amortization expense, year one 60,000,000      
Amortization expense, year two 60,000,000      
Amortization expense, year three 60,000,000      
Amortization expense, year four 59,000,000      
Amortization expense, year five 38,000,000      
Investment Management | Alliance Bernstein        
Goodwill [Line Items]        
Amortization of intangible assets $ 5,100,000,000 $ 4,600,000,000