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LEASES - Narrative (Details)
$ in Millions
 1 Months Ended 12 Months Ended
Dec. 31, 2021
USD ($)
ft²
Dec. 31, 2022
USD ($)
ft²
Dec. 31, 2020
USD ($)
ft²
Apr. 30, 2019
USD ($)
ft²
Lessee, Lease, Description [Line Items]        
Operating lease liabilities | $ $ 768 $ 618    
New York City        
Lessee, Lease, Description [Line Items]        
Lease term       15 years
Area of property, option to decrease (in sq. ft.)   89,000    
Syracuse, NY        
Lessee, Lease, Description [Line Items]        
Area of property (in sq. ft.) 143,000      
Lease term, additional 5 years      
Alliance Bernstein (AB) | New York City        
Lessee, Lease, Description [Line Items]        
Area of property (in sq. ft.)       190,000
Lease term       20 years
Operating lease liabilities | $       $ 448
Area of property, option to decrease, exercised (in sq. ft.)     166,000  
Operating lease, liability, option exercised | $     $ 393  
Minimum        
Lessee, Lease, Description [Line Items]        
Remaining lease term   1 year    
Maximum        
Lessee, Lease, Description [Line Items]        
Remaining lease term   15 years