DERIVATIVE INSTRUMENTS - Summary of Balance Sheet Classification of Derivative Fair Value Amounts, as well as Gross Asset and Liability Fair Value Amounts (Detail) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Derivatives, Fair Value [Line Items]
Notional Amount	$ 59,248	$ 46,744
Derivative Asset, Fair Value	107	240
Derivative Liability, Fair Value	$ 934	$ 933
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other	Other
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other	Other
Cash flow hedges
Derivatives, Fair Value [Line Items]
Notional Amount	$ 18	$ 18
Derivative Asset, Fair Value	0	0
Derivative Liability, Fair Value	5	6
Cash flow hedges | Foreign currency swaps | Variable Interest Entity, Consolidated
Derivatives, Fair Value [Line Items]
Notional Amount	18	18
Derivative Asset, Fair Value	0	0
Derivative Liability, Fair Value	5	6
Net investment hedge
Derivatives, Fair Value [Line Items]
Notional Amount	1,847	1,809
Derivative Asset, Fair Value	45	185
Derivative Liability, Fair Value	9	0
Net investment hedge | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Notional Amount	1,847	1,809
Derivative Asset, Fair Value	45	185
Derivative Liability, Fair Value	9	0
Non-qualifying strategies
Derivatives, Fair Value [Line Items]
Notional Amount	57,383	44,917
Derivative Asset, Fair Value	62	55
Derivative Liability, Fair Value	920	927
Non-qualifying strategies | Foreign currency swaps | Variable Interest Entity, Consolidated
Derivatives, Fair Value [Line Items]
Notional Amount	3,041	3,042
Derivative Asset, Fair Value	44	53
Derivative Liability, Fair Value	680	598
Non-qualifying strategies | Foreign currency swaps | Consolidated Entity Excluding Variable Interest Entities (VIE)
Derivatives, Fair Value [Line Items]
Notional Amount	49	450
Derivative Asset, Fair Value	0	2
Derivative Liability, Fair Value	0	0
Non-qualifying strategies | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Notional Amount	693	0
Derivative Asset, Fair Value	1	0
Derivative Liability, Fair Value	9	0
Non-qualifying strategies | Foreign currency options
Derivatives, Fair Value [Line Items]
Notional Amount	25,000	24,195
Derivative Asset, Fair Value	1	0
Derivative Liability, Fair Value	0	0
Non-qualifying strategies | Interest rate swaps
Derivatives, Fair Value [Line Items]
Notional Amount	28,600	17,230
Derivative Asset, Fair Value	16	0
Derivative Liability, Fair Value	$ 231	$ 329