Segment Information - Reportable Segments and Total Assets (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) segment	Dec. 31, 2022 USD ($)		Dec. 31, 2021 USD ($)
Reporting segments
Number of reportable segments | segment	4
Summary of assets by segment
Total assets	$ 175,191	$ 158,852	[1]	$ 177,735
Advice & Wealth Management
Summary of assets by segment
Total assets	42,983	35,132
Asset Management
Summary of assets by segment
Total assets	7,288	7,967
Retirement & Protection Solutions
Summary of assets by segment
Total assets	108,451	98,901
Corporate & Other
Summary of assets by segment
Total assets	$ 16,469	$ 16,852

[1] Certain prior period amounts have been restated. See Note 3 for more information.