Investments (Variable Interest Entities) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Carrying amount	$ 247,255	$ 235,288
VIE, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Carrying amount	19,992	15,801
Maximum exposure to loss	20,760	15,981
VIE, Not Primary Beneficiary | Fixed maturity securities
Variable Interest Entity [Line Items]
Carrying amount	16,326	13,494
Maximum exposure to loss	15,659	12,416
VIE, Not Primary Beneficiary | Limited partnerships and LLCs
Variable Interest Entity [Line Items]
Carrying amount	3,666	2,307
Maximum exposure to loss	$ 5,101	$ 3,565