BUSINESS SEGMENT INFORMATION - Reconciliation of Assets from Segment to Consolidated (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	$ 287,366	$ 295,727	$ 298,841	$ 287,639	$ 285,469	$ 276,695
Operating Segments \| Individual Retirement
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	118,123	110,358
Operating Segments \| Group Retirement
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	50,353	51,269
Operating Segments \| Asset Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	10,845	10,514
Operating Segments \| Protection Solutions
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	41,725	41,583
Operating Segments \| Wealth Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	191	168
Operating Segments \| Legacy
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	34,955	42,373
Corporate and Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	$ 31,174	$ 39,462