INVESTMENTS - Investments in Consolidated Variable Interest Entities (Detail) - USD ($) $ in Millions		Jun. 30, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Available for sale, fixed maturity securities, amortized cost		$ 88,488	$ 91,630
Available for sale, fixed maturity securities		102,284	105,882
Equity securities		1,475	1,283
Commercial mortgage and other loans		11,332	10,554
Commercial mortgage and other loans, fair value		11,468	10,655
Other investments		3,258	2,429
Asset derivatives		739	583
Assets, fair value		111,634	114,028
Liability derivatives		1,096	697
Liabilities		127,757	131,527
Liabilities, fair value		1,096	697
Variable Interest Entity, Consolidated
Variable Interest Entity [Line Items]
Available for sale, fixed maturity securities, amortized cost	[1]	3,295	3,487
Available for sale, fixed maturity securities		4,493	4,596
Commercial mortgage and other loans	[1]	9,575	8,964
Commercial mortgage and other loans, fair value		9,679	9,040
Other investments	[1],[2]	1,111	826
Other investments, fair value	[2]	1,111	826
Asset derivatives, amortized cost	[1],[3]	110	133
Asset derivatives	[3]	110	133
Assets, amortized cost	[1]	14,091	13,410
Assets, fair value		15,393	14,595
Liability derivatives, amortized cost	[1],[3]	310	231
Liability derivatives	[3]	310	231
Liabilities	[1]	310	231
Liabilities, fair value		$ 310	$ 231

[1] Net of allowance for credit losses

[2] Consists entirely of alternative investments in limited partnerships

[3] Consists entirely of derivatives