Variable Interest Entities (Details) - USD ($) $ in Millions		Sep. 30, 2023	Dec. 31, 2022
Variable Interest Entity [Line Items]
Aggregate assets	[1]	$ 475,204	$ 551,772
Aggregate liabilities	[1]	437,420	515,164
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Aggregate assets		1,482	1,261
Aggregate liabilities		744	619
Maximum exposure to loss		1,524	1,309
Variable Interest Entity, Not Primary Beneficiary | LIHTC Investments
Variable Interest Entity [Line Items]
Aggregate assets		1,306	1,094
Aggregate liabilities		744	619
Maximum exposure to loss		1,306	1,094
Variable Interest Entity, Not Primary Beneficiary | Other investments
Variable Interest Entity [Line Items]
Aggregate assets		176	167
Aggregate liabilities		0	0
Maximum exposure to loss		$ 218	$ 215

[1] Certain prior year amounts have been reclassified to conform to the current year presentation. See Note 1 for additional information.