INVESTMENTS - Investments in Consolidated Variable Interest Entities (Detail) - USD ($) $ in Millions		Sep. 30, 2020		Dec. 31, 2019
Variable Interest Entity [Line Items]
Available for sale, fixed maturity securities, amortized cost		$ 89,938		$ 79,371
Available for sale, fixed maturity securities		103,128		91,262
Equity securities		775		802
Commercial mortgage and other loans		10,822		9,569
Commercial mortgage and other loans, fair value		10,786		9,648
Other investments		1,904		1,477
Asset derivatives		439		482
Assets, fair value		110,728		98,070
Liability derivatives		625		586
Liabilities		128,476		123,809
Liabilities, fair value		625		586
Variable Interest Entity, Consolidated
Variable Interest Entity [Line Items]
Available for sale, fixed maturity securities, amortized cost		3,279	[1]	3,308
Available for sale, fixed maturity securities		4,284		4,312
Commercial mortgage and other loans		9,245	[1]	7,956
Commercial mortgage and other loans, fair value		9,201		8,015
Other investments	[2]	658	[1]	494
Other investments, fair value	[2]	658		494
Asset derivatives, amortized cost	[3]	97	[1]	169
Asset derivatives	[3]	97		169
Assets, amortized cost		13,279	[1]	11,927
Assets, fair value		14,240		12,990
Liability derivatives, amortized cost	[3]	240	[1]	126
Liability derivatives	[3]	240		126
Liabilities		240	[1]	126
Liabilities, fair value		$ 240		$ 126

[1] Net of allowance for credit losses

[2] Consists entirely of alternative investments in limited partnerships

[3] Consists entirely of derivatives