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BUSINESS SEGMENT INFORMATION - Reconciliation of Assets from Segment to Consolidated (Details) - USD ($)
$ in Millions
Sep. 30, 2022
Dec. 31, 2021
Segment Reporting Information [Line Items]    
Total assets $ 245,600 $ 292,262
Operating Segments | Individual Retirement    
Segment Reporting Information [Line Items]    
Total assets 119,883 143,663
Operating Segments | Group Retirement    
Segment Reporting Information [Line Items]    
Total assets 38,908 55,368
Operating Segments | Investment Management and Research    
Segment Reporting Information [Line Items]    
Total assets 12,370 11,602
Operating Segments | Protection Solutions    
Segment Reporting Information [Line Items]    
Total assets 36,998 50,686
Corporate and Other    
Segment Reporting Information [Line Items]    
Total assets $ 37,441 $ 30,943