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GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Nov. 22, 2022
Goodwill [Line Items]          
Impairment loss   $ 0 $ 0    
Alliance Bernstein Intangible Assets          
Goodwill [Line Items]          
Gross carrying amount of intangible assets $ 1,200,000,000 1,200,000,000 1,200,000,000    
Accumulated amortization of these intangible assets 970,000,000 970,000,000 911,000,000    
Amortization of intangible assets   59,000,000 (58,000,000) $ (43,000,000)  
Amortization expense, year one 58,000,000 58,000,000      
Amortization expense, year two 58,000,000 58,000,000      
Amortization expense, year three 37,000,000 37,000,000      
Amortization expense, year four 26,000,000 26,000,000      
Amortization expense, year five 24,000,000 24,000,000      
Impairment charge 4,000,000        
Disposal Group, Held-for-Sale, Not Discontinued Operations | BRS Business          
Goodwill [Line Items]          
Disposal group, including discontinued operation, goodwill         $ 170,000,000
Investment Management          
Goodwill [Line Items]          
Goodwill $ 5,100,000,000 $ 5,100,000,000 $ 5,100,000,000