Segment Information - Total Assets (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Summary of assets by segment
Total assets	$ 154,902	$ 151,828
Advice and Wealth Management [Member]
Summary of assets by segment
Total assets	19,911	17,607
Asset Management [Member]
Summary of assets by segment
Total assets	7,964	8,226
Annuities [Member]
Summary of assets by segment
Total assets	99,847	98,195
Protection [Member]
Summary of assets by segment
Total assets	17,342	16,980
Corporate and Other [Member]
Summary of assets by segment
Total assets	$ 9,838	$ 10,820