Investments - Summary of Maximum Loss Exposure (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Assets	$ 234,254	$ 235,149
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	61,693	58,948
Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Assets	51,681	53,243
Variable Interest Entity, Not Primary Beneficiary [Member] | Investment funds
Variable Interest Entity [Line Items]
Assets	9,494	1,297
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	15,121	1,647
Variable Interest Entity, Not Primary Beneficiary, Consolidated Entity Exclude Affiliated | Investment funds
Variable Interest Entity [Line Items]
Assets	133	1,178
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	217	1,792
Variable Interest Entity, Not Primary Beneficiary, Consolidated Entity Exclude Affiliated | Debt Securities [Member]
Variable Interest Entity [Line Items]
Assets	31,507	31,769
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	35,103	31,622
Variable Interest Entity, Not Primary Beneficiary, Affiliated Entity | Investment funds
Variable Interest Entity [Line Items]
Assets	1,538	7,391
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	1,776	10,922
Variable Interest Entity, Not Primary Beneficiary, Affiliated Entity | Debt Securities [Member]
Variable Interest Entity [Line Items]
Assets	8,846	11,324
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	9,313	12,681
Variable Interest Entity, Not Primary Beneficiary, Affiliated Entity | Equity securities
Variable Interest Entity [Line Items]
Assets	163	284
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	$ 163	$ 284