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BUSINESS SEGMENT INFORMATION - Reconciliation of Assets from Segment to Consolidated (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Segment Reporting Information [Line Items]    
Total assets $ 252,702 $ 295,688
Operating Segments | Individual Retirement    
Segment Reporting Information [Line Items]    
Total assets 77,641 78,598
Operating Segments | Group Retirement    
Segment Reporting Information [Line Items]    
Total assets 42,421 57,458
Operating Segments | Investment Management and Research    
Segment Reporting Information [Line Items]    
Total assets 12,633 11,986
Operating Segments | Protection Solutions    
Segment Reporting Information [Line Items]    
Total assets 37,224 50,089
Operating Segments | Wealth Management    
Segment Reporting Information [Line Items]    
Total assets 137 140
Operating Segments | Legacy    
Segment Reporting Information [Line Items]    
Total assets 48,231 64,578
Corporate and Other    
Segment Reporting Information [Line Items]    
Total assets $ 34,415 $ 32,839