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SHARE-BASED COMPENSATION PROGRAMS - Narrative (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2022
USD ($)
tranche
shares
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
USD ($)
shares
Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (in shares) 1,340,926    
Stock Options | Vesting trach one      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting rights, percentage 33.33%    
Stock Options | Vesting tranche two      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting rights, percentage 33.33%    
Stock Options | Vesting tranche three      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting rights, percentage 33.33%    
Performance Shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (in shares) 704,769    
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost not yet recognized | $ $ 74    
Compensation cost, recognition period 2 months 12 days    
ROE Performance Shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of award type 50.00%    
TSR Performance Share Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of award type 50.00%    
Omnibus Plans      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Holding unit-based awards authorized for grant (in shares) 22,000,000    
Annual Awards | Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Annual Awards | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Annual Awards | Performance Shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Share-based compensation arrangement by share-based payment award, number of distant tranches from performance shares | tranche 2    
Composition of performance shares, percentage representing a portion of the award 50.00%    
Annual Awards | Performance Shares | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Potential shares earned, percentage 0.00%    
Annual Awards | Performance Shares | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Potential shares earned, percentage 200.00%    
2017 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Holding unit-based awards authorized for grant (in shares) 60,000,000    
2017 Plan | Newly Issued AB Holding Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Holding unit-based awards authorized for grant (in shares) 30,000,000    
Shares available for grant (in shares) 30,200,000    
Plan 2017 Subject to Other Holding Unit Awards | Newly Issued AB Holding Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for grant (in shares) 29,800,000    
Parent | Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost, recognition period 1 year 7 months 20 days    
Unvested restricted shares and holding units (in shares) 3,000,000    
Compensation cost not yet recognized | $ $ 33,000    
Parent | Performance Shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (in shares) 0    
Compensation cost, recognition period 1 year 6 months 10 days    
Unvested restricted shares and holding units (in shares) 1,300,000    
Compensation cost not yet recognized | $ $ 10,000    
Parent | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost not yet recognized | $ $ 113    
Compensation cost, recognition period 1 month 6 days    
Parent | AB Holding      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost, recognition period 6 years 1 month 6 days    
Unvested restricted shares and holding units (in shares) 15,000,000    
Compensation cost not yet recognized | $ $ 114,000    
Alliance Bernstein      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares repurchased (in shares) 5,200,000 5,600,000 5,400,000
Payments for repurchase of other equity | $ $ 212,000 $ 262,000 $ 149,000
Open market purchases (in shares) 2,300,000 2,600,000 3,100,000
Open-market purchases, value | $ $ 92,700 $ 117,900 $ 74,000
Shares issued in period (in shares) 6,000 100,000 5,000
Proceeds from options exercised | $ $ 100 $ 3,000 $ 147
Alliance Bernstein | Employees and Directors      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares issued in period (in shares) 4,700,000 7,000,000 5,700,000