Segment Information (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Summary of assets by segment
Total assets	$ 165,883	$ 151,828
Advice & Wealth Management [Member]
Summary of assets by segment
Total assets	21,266	17,607
Asset Management [Member]
Summary of assets by segment
Total assets	8,406	8,226
Retirement & Protection Solutions
Summary of assets by segment
Total assets	114,850	104,227
Corporate & Other [Member]
Summary of assets by segment
Total assets	$ 21,361	$ 21,768