VARIABLE INTEREST ENTITIES - Assets and Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Variable Interest Entity [Line Items]
Assets	$ 42,590	$ 39,513	$ 39,361
Liabilities	37,184	34,363
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Assets	151	150
Liabilities	112	107
Maximum Exposure to Loss	150	149
Trust Preferred Securities | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Assets	1	1
Liabilities	72	67
Maximum Exposure to Loss	0	0
Affordable housing tax credit partnerships | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Assets	121	121
Liabilities	35	34
Maximum Exposure to Loss	121	121
Other investments | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Assets	29	28
Liabilities	5	6
Maximum Exposure to Loss	$ 29	$ 28