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BUSINESS SEGMENT INFORMATION - Reconciliation of Assets from Segment to Consolidated (Details) - USD ($) $ in Millions | Sep. 30, 2022 | Dec. 31, 2021
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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

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