FAIR VALUE DISCLOSURES - Carrying Values And Fair Values Of Financial Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Consolidated Amounts [Abstract]
Mortgage loans on real estate	$ 13,142	$ 12,090
Policy loans	3,635	3,270
Policyholders’ liabilities: Investment contracts	63,109	55,421
Separate Accounts liabilities	133,350	124,646
Carrying Value
Consolidated Amounts [Abstract]
Mortgage loans on real estate	13,142	12,090
Policy loans	3,635	3,270
Loans to affiliates	900	1,200
Policyholders’ liabilities: Investment contracts	2,069	1,922
FHLB funding agreements	6,897	6,909
FABN funding agreements	1,939
Separate Accounts liabilities	10,081	9,041
Fair Value
Consolidated Amounts [Abstract]
Mortgage loans on real estate	13,474	12,317
Policy loans	4,794	4,199
Loans to affiliates	938	1,224
Policyholders’ liabilities: Investment contracts	2,275	2,029
FHLB funding agreements	6,990	6,957
FABN funding agreements	1,971
Separate Accounts liabilities	10,081	9,041
Fair Value \| Level 1
Consolidated Amounts [Abstract]
Mortgage loans on real estate	0	0
Policy loans	0	0
Loans to affiliates	0	0
Policyholders’ liabilities: Investment contracts	0	0
FHLB funding agreements	0	0
FABN funding agreements	0
Separate Accounts liabilities	0	0
Fair Value \| Level 2
Consolidated Amounts [Abstract]
Mortgage loans on real estate	0	0
Policy loans	0	0
Loans to affiliates	938	1,224
Policyholders’ liabilities: Investment contracts	0	0
FHLB funding agreements	6,990	6,957
FABN funding agreements	1,971
Separate Accounts liabilities	0	0
Fair Value \| Level 3
Consolidated Amounts [Abstract]
Mortgage loans on real estate	13,474	12,317
Policy loans	4,794	4,199
Loans to affiliates	0	0
Policyholders’ liabilities: Investment contracts	2,275	2,029
FHLB funding agreements	0	0
FABN funding agreements	0
Separate Accounts liabilities	$ 10,081	$ 9,041

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Funds Backed By Reinsurance Agreements, Asset

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Amount of the reinsurer's funds held on its behalf by the ceding insurer, including funds held in trust, under reinsurance treaties or contracts with the assuming insurer as security for the payment of the obligations thereunder.

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Amount before allowance of loans made to policy and contract holders using their life insurance contracts' cash value or separate accounts as collateral. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums over and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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