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	Mar. 31, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Notional Amount	$ 45,161	$ 58,656
Derivative asset, fair value, gross asset including not subject to master netting arrangement	841	583
Derivative liability, fair value, gross liability including not subject to master netting arrangement	1,094	697
Asset derivatives fair value	703	450
Liability derivatives fair value	876	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	8,736	8,929
Asset derivatives fair value	0	2
Liability derivatives fair value	87	0
Fair value hedges \| Foreign currency forwards
Derivatives, Fair Value [Line Items]
Notional Amount	64	64
Asset derivatives fair value	0	2
Liability derivatives fair value	2	0
Fair value hedges \| Foreign currency options
Derivatives, Fair Value [Line Items]
Notional Amount	8,672	8,865
Asset derivatives fair value	0	0
Liability derivatives fair value	85	0
Net investment hedge
Derivatives, Fair Value [Line Items]
Notional Amount	6,874	7,037
Asset derivatives fair value	277	15
Liability derivatives fair value	1	84
Net investment hedge \| Foreign currency forwards
Derivatives, Fair Value [Line Items]
Notional Amount	4,978	5,010
Asset derivatives fair value	277	14
Liability derivatives fair value	1	84
Net investment hedge \| Foreign currency options
Derivatives, Fair Value [Line Items]
Notional Amount	1,896	2,027
Asset derivatives fair value	0	1
Liability derivatives fair value	0	0
Non-qualifying strategies
Derivatives, Fair Value [Line Items]
Notional Amount	29,533	42,672
Asset derivatives fair value	564	566
Liability derivatives fair value	1,004	612
Non-qualifying strategies \| Foreign currency swaps \| Variable Interest Entity, Consolidated
Derivatives, Fair Value [Line Items]
Notional Amount	2,904	2,857
Asset derivatives fair value	138	133
Liability derivatives fair value	216	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	63	47
Liability derivatives fair value	24	81
Non-qualifying strategies \| Foreign currency forwards
Derivatives, Fair Value [Line Items]
Notional Amount	15,285	26,528
Asset derivatives fair value	319	386
Liability derivatives fair value	763	301
Non-qualifying strategies \| Foreign currency options
Derivatives, Fair Value [Line Items]
Notional Amount	9,094	11,037
Asset derivatives fair value	44	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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