Segment Information - Reportable Segments and Total Assets (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) segement	Dec. 31, 2020 USD ($)
Reporting segments
Number of reporting segments | segement	4
Summary of assets by segment
Total assets	$ 175,979	$ 165,883
Advice and Wealth Management Segment
Summary of assets by segment
Total assets	24,986	21,266
Asset Management Segment
Summary of assets by segment
Total assets	10,990	8,406
Retirement and Protection Solutions Segment
Summary of assets by segment
Total assets	119,469	114,850
Corporate and Other Segment
Summary of assets by segment
Total assets	$ 20,534	$ 21,361