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Investments (Variable Interest Entities) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Carrying amount	$ 239,688	$ 236,340
VIE, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Carrying amount	19,880	19,759
Maximum exposure to loss	22,190	22,026
VIE, Not Primary Beneficiary | Fixed maturity securities
Variable Interest Entity [Line Items]
Carrying amount	15,659	15,526
Maximum exposure to loss	16,944	16,771
VIE, Not Primary Beneficiary | Limited partnerships and LLCs
Variable Interest Entity [Line Items]
Carrying amount	4,221	4,233
Maximum exposure to loss	$ 5,246	$ 5,255

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