Segments - Total Assets (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total assets	$ 163,889	$ 157,085
Operating Segments and Corporate Nonsegment
Segment Reporting Information [Line Items]
Total assets	159,361	152,781
Operating Segments | Wealth Solutions
Segment Reporting Information [Line Items]
Total assets	129,058	122,318
Operating Segments | Health Solutions
Segment Reporting Information [Line Items]
Total assets	3,490	3,336
Operating Segments | Investment Management
Segment Reporting Information [Line Items]
Total assets	1,873	1,600
Corporate
Segment Reporting Information [Line Items]
Total assets	24,940	25,527
Consolidation of investment entities
Segment Reporting Information [Line Items]
Total assets	$ 4,528	$ 4,304