Segment Information - Total Assets (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Summary of assets by segment
Total assets	$ 145,682	$ 151,828
Advice and Wealth Management [Member]
Summary of assets by segment
Total assets	20,238	17,607
Asset Management [Member]
Summary of assets by segment
Total assets	7,617	8,226
Annuities [Member]
Summary of assets by segment
Total assets	93,363	98,195
Protection [Member]
Summary of assets by segment
Total assets	15,632	16,980
Corporate and Other [Member]
Summary of assets by segment
Total assets	$ 8,832	$ 10,820