INVESTMENTS - Investments in Consolidated Variable Interest Entities (Detail) - USD ($) $ in Millions		Jun. 30, 2020		Dec. 31, 2019
Variable Interest Entity [Line Items]
Available for sale, fixed maturity securities, amortized cost		$ 88,177		$ 79,371
Available for sale, fixed maturity securities		99,959		91,262
Equity securities		749		802
Commercial mortgage and other loans		10,717		9,569
Commercial mortgage and other loans, fair value		10,650		9,648
Other investments		1,771		1,477
Asset derivatives		474		482
Assets, fair value		107,473		98,070
Liability derivatives		680		586
Liabilities		127,667		123,809
Liabilities, fair value		680		586
Variable Interest Entity, Consolidated
Variable Interest Entity [Line Items]
Available for sale, fixed maturity securities, amortized cost		3,127	[1]	3,308
Available for sale, fixed maturity securities		4,063		4,312
Commercial mortgage and other loans		9,117	[1]	7,956
Commercial mortgage and other loans, fair value		9,049		8,015
Other investments	[2]	589	[1]	494
Other investments, fair value	[2]	589		494
Asset derivatives, amortized cost	[3]	87	[1]	169
Asset derivatives	[3]	87		169
Assets, amortized cost		12,920	[1]	11,927
Assets, fair value		13,788		12,990
Liability derivatives, amortized cost	[3]	255	[1]	126
Liability derivatives	[3]	255		126
Liabilities		255	[1]	126
Liabilities, fair value		$ 255		$ 126

[1] Net of allowance for credit losses

[2] Consists entirely of alternative investments in limited partnerships

[3] Consists entirely of derivatives