Segment Information - Reportable Segments and Total Assets (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) segment	Dec. 31, 2021 USD ($)
Reporting segments
Number of reporting segments | segment	4
Summary of assets by segment
Total assets	$ 158,468	$ 175,910
Advice & Wealth Management
Summary of assets by segment
Total assets	35,132	24,986
Asset Management
Summary of assets by segment
Total assets	7,967	10,990
Retirement & Protection Solutions
Summary of assets by segment
Total assets	98,530	119,400
Corporate & Other
Summary of assets by segment
Total assets	$ 16,839	$ 20,534