INVESTMENTS - Investments in Consolidated Variable Interest Entities (Detail) - USD ($) $ in Millions		Mar. 31, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Available for sale, fixed maturity securities, amortized cost		$ 88,465	$ 91,630
Available for sale, fixed maturity securities		100,744	105,882
Equity securities		1,174	1,283
Commercial mortgage and other loans		10,847	10,554
Commercial mortgage and other loans, fair value		10,898	10,655
Other investments		2,666	2,429
Asset derivatives		841	583
Assets, fair value		109,044	114,028
Liability derivatives		1,094	697
Liabilities		126,054	131,527
Liabilities, fair value		1,094	697
Variable Interest Entity, Consolidated
Variable Interest Entity [Line Items]
Available for sale, fixed maturity securities, amortized cost	[1]	3,291	3,487	[2]
Available for sale, fixed maturity securities		4,353	4,596
Commercial mortgage and other loans	[1]	9,210	8,964	[2]
Commercial mortgage and other loans, fair value		9,247	9,040
Other investments	[1],[3]	908	826	[2]
Other investments, fair value	[3]	908	826
Asset derivatives, amortized cost	[1],[4]	138	133	[2]
Asset derivatives	[4]	138	133
Assets, amortized cost	[1]	13,547	13,410	[2]
Assets, fair value		14,646	14,595
Liability derivatives, amortized cost	[1],[4]	218	231
Liability derivatives	[4]	218	231
Liabilities	[1]	218	231
Liabilities, fair value		$ 218	$ 231

[1] Net of allowance for credit losses

[2] Consists entirely of alternative investments in limited partnerships

[3] Consists entirely of alternative investments in limited partnerships

[4] Consists entirely of derivatives