Consolidated Investment Entities - Limited Partnerships (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Total assets	$ 155,732	$ 169,051
VIEs, Not Primary Beneficiary | Fixed maturities, available-for-sale, including securities pledged
Variable Interest Entity [Line Items]
Total assets	339	377
Maximum exposure to loss	339	377
VIEs, Not Primary Beneficiary | Limited partnership/corporations
Variable Interest Entity [Line Items]
Total assets	1,343	1,290
Maximum exposure to loss	$ 1,343	$ 1,290