Investments (Variable Interest Entities) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Carrying amount	$ 229,292	$ 226,204
VIE, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Carrying amount	19,734	19,606
Maximum exposure to loss	22,024	21,853
VIE, Not Primary Beneficiary | Fixed maturity securities
Variable Interest Entity [Line Items]
Carrying amount	15,526	15,386
Maximum exposure to loss	16,791	16,611
VIE, Not Primary Beneficiary | Limited partnerships and LLCs
Variable Interest Entity [Line Items]
Carrying amount	4,208	4,220
Maximum exposure to loss	$ 5,233	$ 5,242