INVESTMENTS - Investments in Consolidated Variable Interest Entities (Detail) - USD ($) $ in Millions		Sep. 30, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Available for sale, fixed maturity securities, amortized cost		$ 87,228	$ 91,630
Available for sale, fixed maturity securities		100,722	105,882
Equity securities		1,461	1,283
Commercial mortgage and other loans		11,388	10,554
Commercial mortgage and other loans, fair value		11,596	10,655
Other investments		3,612	2,429
Asset derivatives		745	583
Assets, fair value		110,969	114,028
Liability derivatives		1,270	697
Liabilities		127,045	131,527
Liabilities, fair value		1,270	697
Variable Interest Entity, Consolidated
Variable Interest Entity [Line Items]
Available for sale, fixed maturity securities, amortized cost	[1]	3,228	3,487
Available for sale, fixed maturity securities		4,437	4,596
Commercial mortgage and other loans	[1]	9,543	8,964
Commercial mortgage and other loans, fair value		9,723	9,040
Other investments	[1],[2]	1,272	826
Other investments, fair value	[2]	1,272	826
Asset derivatives, amortized cost	[1],[3]	99	133
Asset derivatives	[3]	99	133
Assets, amortized cost	[1]	14,142	13,410
Assets, fair value		15,531	14,595
Liability derivatives, amortized cost	[1],[3]	356	231
Liability derivatives	[3]	356	231
Liabilities	[1]	356	231
Liabilities, fair value		$ 356	$ 231

[1] Net of allowance for credit losses

[2] Consists entirely of alternative investments in limited partnerships

[3] Consists entirely of derivatives