SIGNIFICANT ACCOUNTING POLICIES - Accounting and Consolidation of Variable Interest Entities (VIEs) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Variable Interest Entity [Line Items]
Assets	$ 234,826	$ 227,416
Investments	86,629	85,034
Consolidated Limited Partnerships
Variable Interest Entity [Line Items]
Assets	532	410
Non-consolidated Vairable Interest Entities
Variable Interest Entity [Line Items]
Assets	257,000	282,300
Investments	2,400	2,300
Variable interest, maximum loss exposure	2,400	2,300
Unfunded commitments	$ 1,300	$ 1,300