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	Jun. 30, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Notional Amount	$ 50,020	$ 61,695
Derivative asset, fair value, gross asset including not subject to master netting arrangement	474	482
Derivative liability, fair value, gross liability including not subject to master netting arrangement	680	586
Asset derivatives fair value	387	313
Liability derivatives fair value	425	460
Cash flow hedges
Derivatives, Fair Value [Line Items]
Notional Amount	75	75
Asset derivatives fair value	0	0
Liability derivatives fair value	13	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	13	8
Fair value hedges
Derivatives, Fair Value [Line Items]
Notional Amount	8,994	12,780
Asset derivatives fair value	0	0
Liability derivatives fair value	2	43
Fair value hedges \| Foreign currency forwards
Derivatives, Fair Value [Line Items]
Notional Amount	62	964
Asset derivatives fair value	0	0
Liability derivatives fair value	0	38
Fair value hedges \| Foreign currency options
Derivatives, Fair Value [Line Items]
Notional Amount	8,689	11,573
Asset derivatives fair value	0	0
Liability derivatives fair value	2	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	7,726	6,952
Asset derivatives fair value	123	72
Liability derivatives fair value	2	2
Net investment hedge \| Foreign currency forwards
Derivatives, Fair Value [Line Items]
Notional Amount	4,994	4,952
Asset derivatives fair value	122	72
Liability derivatives fair value	2	2
Net investment hedge \| Foreign currency options
Derivatives, Fair Value [Line Items]
Notional Amount	2,732	2,000
Asset derivatives fair value	1	0
Liability derivatives fair value	0	0
Non-qualifying strategies
Derivatives, Fair Value [Line Items]
Notional Amount	33,225	41,888
Asset derivatives fair value	351	410
Liability derivatives fair value	663	533
Non-qualifying strategies \| Foreign currency swaps \| Variable Interest Entity
Derivatives, Fair Value [Line Items]
Notional Amount	2,657	2,587
Asset derivatives fair value	87	169
Liability derivatives fair value	242	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	73	72
Liability derivatives fair value	29	78
Non-qualifying strategies \| Foreign currency forwards
Derivatives, Fair Value [Line Items]
Notional Amount	17,110	19,821
Asset derivatives fair value	177	166
Liability derivatives fair value	391	337
Non-qualifying strategies \| Foreign currency options
Derivatives, Fair Value [Line Items]
Notional Amount	9,149	9,553
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	2,000	7,120
Asset derivatives fair value	14	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
Non-qualifying strategies \| Forward bond purchase commitment \| Variable Interest Entity
Derivatives, Fair Value [Line Items]
Notional Amount	52	0
Asset derivatives fair value	0	0
Liability derivatives fair value	$ 1	$ 0

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