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BUSINESS SEGMENT INFORMATION - Reconciliation of Assets from Segment to Consolidated (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Segment Reporting Information [Line Items] |  |
Total assets | $ 261,500 | $ 252,702
Operating Segments | Individual Retirement |  |
Segment Reporting Information [Line Items] |  |
Total assets | 77,922 | 77,641
Operating Segments | Group Retirement |  |
Segment Reporting Information [Line Items] |  |
Total assets | 44,171 | 42,421
Operating Segments | Investment Management and Research |  |
Segment Reporting Information [Line Items] |  |
Total assets | 11,864 | 12,633
Operating Segments | Protection Solutions |  |
Segment Reporting Information [Line Items] |  |
Total assets | 37,845 | 37,224
Operating Segments | Wealth Management |  |
Segment Reporting Information [Line Items] |  |
Total assets | 174 | 137
Operating Segments | Legacy |  |
Segment Reporting Information [Line Items] |  |
Total assets | 49,804 | 48,231
Corporate and Other |  |
Segment Reporting Information [Line Items] |  |
Total assets | $ 39,720 | $ 34,415

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