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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 $ 253,468 $ 292,262
Operating Segments | Individual Retirement    
Segment Reporting Information [Line Items]    
Total assets 125,588 143,663
Operating Segments | Group Retirement    
Segment Reporting Information [Line Items]    
Total assets 42,656 55,368
Operating Segments | Investment Management and Research    
Segment Reporting Information [Line Items]    
Total assets 12,633 11,602
Operating Segments | Protection Solutions    
Segment Reporting Information [Line Items]    
Total assets 37,730 50,686
Corporate and Other    
Segment Reporting Information [Line Items]    
Total assets $ 34,861 $ 30,943