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, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Notional Amount	$ 53,291	$ 61,695
Derivative asset, fair value, gross asset including not subject to master netting arrangement	472	482
Derivative liability, fair value, gross liability including not subject to master netting arrangement	723	586
Asset derivatives fair value	383	313
Liability derivatives fair value	488	460
Cash flow hedges
Derivatives, Fair Value [Line Items]
Notional Amount	75	75
Asset derivatives fair value	0	0
Liability derivatives fair value	11	8
Cash flow hedges \| Foreign currency swaps \| Variable Interest Entity
Derivatives, Fair Value [Line Items]
Notional Amount	75	75
Asset derivatives fair value	0	0
Liability derivatives fair value	11	8
Fair value hedges
Derivatives, Fair Value [Line Items]
Notional Amount	9,115	12,780
Asset derivatives fair value	12	0
Liability derivatives fair value	24	43
Fair value hedges \| Foreign currency forwards
Derivatives, Fair Value [Line Items]
Notional Amount	63	964
Asset derivatives fair value	0	0
Liability derivatives fair value	1	38
Fair value hedges \| Foreign currency options
Derivatives, Fair Value [Line Items]
Notional Amount	8,809	11,573
Asset derivatives fair value	12	0
Liability derivatives fair value	23	5
Fair value hedges \| Interest rate swaptions
Derivatives, Fair Value [Line Items]
Notional Amount	243	243
Asset derivatives fair value	0	0
Liability derivatives fair value	0	0
Net investment hedge
Derivatives, Fair Value [Line Items]
Notional Amount	7,025	6,952
Asset derivatives fair value	92	72
Liability derivatives fair value	6	2
Net investment hedge \| Foreign currency forwards
Derivatives, Fair Value [Line Items]
Notional Amount	4,985	4,952
Asset derivatives fair value	85	72
Liability derivatives fair value	6	2
Net investment hedge \| Foreign currency options
Derivatives, Fair Value [Line Items]
Notional Amount	2,040	2,000
Asset derivatives fair value	7	0
Liability derivatives fair value	0	0
Non-qualifying strategies
Derivatives, Fair Value [Line Items]
Notional Amount	37,076	41,888
Asset derivatives fair value	368	410
Liability derivatives fair value	682	533
Non-qualifying strategies \| Foreign currency swaps \| Variable Interest Entity
Derivatives, Fair Value [Line Items]
Notional Amount	2,587	2,587
Asset derivatives fair value	89	169
Liability derivatives fair value	224	118
Non-qualifying strategies \| Foreign currency swaps \| Consolidated Entity Excluding Variable Interest Entities (VIE)
Derivatives, Fair Value [Line Items]
Notional Amount	2,250	2,800
Asset derivatives fair value	66	72
Liability derivatives fair value	38	78
Non-qualifying strategies \| Foreign currency forwards
Derivatives, Fair Value [Line Items]
Notional Amount	20,614	19,821
Asset derivatives fair value	184	166
Liability derivatives fair value	420	337
Non-qualifying strategies \| Foreign currency options
Derivatives, Fair Value [Line Items]
Notional Amount	9,248	9,553
Asset derivatives fair value	8	0
Liability derivatives fair value	0	0
Non-qualifying strategies \| Interest rate swaps
Derivatives, Fair Value [Line Items]
Notional Amount	2,370	7,120
Asset derivatives fair value	21	3
Liability derivatives fair value	0	0
Non-qualifying strategies \| Interest rate swaptions
Derivatives, Fair Value [Line Items]
Notional Amount	7	7
Asset derivatives fair value	0	0
Liability derivatives fair value	$ 0	$ 0

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