Segment Information - Total Assets (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Summary of assets by segment
Total assets	$ 148,678	$ 137,216
Advice and Wealth Management [Member]
Summary of assets by segment
Total assets	16,281	14,480
Asset Management [Member]
Summary of assets by segment
Total assets	7,949	7,558
Annuities [Member]
Summary of assets by segment
Total assets	95,868	88,771
Protection [Member]
Summary of assets by segment
Total assets	16,787	17,126
Corporate and Other [Member]
Summary of assets by segment
Total assets	9,766	$ 9,281
Assets Held-for-sale, Auto and Home [Domain]
Summary of assets by segment
Total assets	$ 2,027