SIGNIFICANT ACCOUNTING POLICIES - Accounting and Consolidation of Variable Interest Entities (VIEs) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Assets	$ 230,018	$ 267,807
Investments	85,437	96,680
Consolidated Limited Partnerships
Variable Interest Entity [Line Items]
Assets	193	169
Non-consolidated Vairable Interest Entities
Variable Interest Entity [Line Items]
Assets	278,000	245,700
Investments	2,300	2,100
Variable interest, maximum loss exposure	2,300	2,100
Unfunded commitments	$ 1,300	$ 1,200