Segment Information - Reportable Segments and Total Assets (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($) segment	Dec. 31, 2022 USD ($)		Dec. 31, 2021 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment	4
Summary of assets by segment
Total assets	$ 166,640	$ 158,852	[1]	$ 177,735
Advice & Wealth Management
Summary of assets by segment
Total assets	39,099	35,132
Asset Management
Summary of assets by segment
Total assets	7,768	7,967
Retirement & Protection Solutions
Summary of assets by segment
Total assets	102,337	98,901
Corporate & Other
Summary of assets by segment
Total assets	$ 17,436	$ 16,852

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