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, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Notional Amount	$ 41,694	$ 58,656
Derivative asset, fair value, gross asset including not subject to master netting arrangement	745	583
Derivative liability, fair value, gross liability including not subject to master netting arrangement	1,270	697
Asset derivatives fair value	646	450
Liability derivatives fair value	914	466
Cash flow hedges
Derivatives, Fair Value [Line Items]
Notional Amount	18	18
Asset derivatives fair value	0	0
Liability derivatives fair value	2	1
Cash flow hedges \| Foreign currency swaps \| Variable Interest Entity, Consolidated
Derivatives, Fair Value [Line Items]
Notional Amount	18	18
Asset derivatives fair value	0	0
Liability derivatives fair value	2	1
Fair value hedges
Derivatives, Fair Value [Line Items]
Notional Amount	8,472	8,929
Asset derivatives fair value	1	2
Liability derivatives fair value	3	0
Fair value hedges \| Foreign currency forwards
Derivatives, Fair Value [Line Items]
Notional Amount	62	64
Asset derivatives fair value	0	2
Liability derivatives fair value	3	0
Fair value hedges \| Foreign currency options
Derivatives, Fair Value [Line Items]
Notional Amount	8,410	8,865
Asset derivatives fair value	1	0
Liability derivatives fair value	0	0
Net investment hedge
Derivatives, Fair Value [Line Items]
Notional Amount	6,950	7,037
Asset derivatives fair value	240	15
Liability derivatives fair value	0	84
Net investment hedge \| Foreign currency forwards
Derivatives, Fair Value [Line Items]
Notional Amount	4,996	5,010
Asset derivatives fair value	240	14
Liability derivatives fair value	0	84
Net investment hedge \| Foreign currency options
Derivatives, Fair Value [Line Items]
Notional Amount	1,954	2,027
Asset derivatives fair value	0	1
Liability derivatives fair value	0	0
Non-qualifying strategies
Derivatives, Fair Value [Line Items]
Notional Amount	26,254	42,672
Asset derivatives fair value	504	566
Liability derivatives fair value	1,265	612
Non-qualifying strategies \| Foreign currency swaps \| Variable Interest Entity, Consolidated
Derivatives, Fair Value [Line Items]
Notional Amount	3,141	2,857
Asset derivatives fair value	99	133
Liability derivatives fair value	354	230
Non-qualifying strategies \| Foreign currency swaps \| Consolidated Entity Excluding Variable Interest Entities (VIE)
Derivatives, Fair Value [Line Items]
Notional Amount	2,250	2,250
Asset derivatives fair value	52	47
Liability derivatives fair value	22	81
Non-qualifying strategies \| Foreign currency forwards
Derivatives, Fair Value [Line Items]
Notional Amount	14,153	26,528
Asset derivatives fair value	353	386
Liability derivatives fair value	872	301
Non-qualifying strategies \| Foreign currency options
Derivatives, Fair Value [Line Items]
Notional Amount	3,165	11,037
Asset derivatives fair value	0	0
Liability derivatives fair value	0	0
Non-qualifying strategies \| Interest rate swaps
Derivatives, Fair Value [Line Items]
Notional Amount	3,500	0
Asset derivatives fair value	0	0
Liability derivatives fair value	16	0
Non-qualifying strategies \| Forward bond purchase commitment \| Variable Interest Entity, Consolidated
Derivatives, Fair Value [Line Items]
Notional Amount	45	0
Asset derivatives fair value	0	0
Liability derivatives fair value	$ 1	$ 0

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and elected not to be offset.

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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