FAIR VALUE OF ASSETS AND LIABILITIES - Fair Value of Financial Instruments (Details) - USD ($) $ in Millions		Sep. 30, 2022	Dec. 31, 2021
Assets
Accrued investment income		$ 56	$ 61
Reinsurance recoverables	[1]	220	8,108
Fair Value
Assets
Commercial mortgage and other loans			1,516
Policy loans			12
Short-term investments			81
Cash and cash equivalents			277
Accrued investment income		56	61
Other invested assets - Policy loans		11
Reinsurance recoverables			9
Receivables from parent and affiliates			5
Other assets			2,279
Total assets			4,240
Liabilities:
Repurchase agreements		200
Cash collateral for loaned securities		169
Policyholders’ account balances - investment contracts			2,391
Payables to parent and affiliates			36
Other liabilities			105
Separate account liabilities - investment contracts			0
Total liabilities			2,532
Fair Value | Level 1
Assets
Commercial mortgage and other loans			0
Policy loans			0
Short-term investments			81
Cash and cash equivalents			277
Accrued investment income		0	0
Other invested assets - Policy loans		0
Reinsurance recoverables			0
Receivables from parent and affiliates			0
Other assets			0
Total assets			358
Liabilities:
Repurchase agreements		0
Cash collateral for loaned securities		0
Policyholders’ account balances - investment contracts			0
Payables to parent and affiliates			0
Other liabilities			0
Separate account liabilities - investment contracts			0
Total liabilities			0
Fair Value | Level 2
Assets
Commercial mortgage and other loans			0
Policy loans			0
Short-term investments			0
Cash and cash equivalents			0
Accrued investment income		56	61
Other invested assets - Policy loans		0
Reinsurance recoverables			0
Receivables from parent and affiliates			5
Other assets			4
Total assets			70
Liabilities:
Repurchase agreements		200
Cash collateral for loaned securities		169
Policyholders’ account balances - investment contracts			0
Payables to parent and affiliates			36
Other liabilities			105
Separate account liabilities - investment contracts			0
Total liabilities			141
Fair Value | Level 3
Assets
Commercial mortgage and other loans			1,516
Policy loans			12
Short-term investments			0
Cash and cash equivalents			0
Accrued investment income		0	0
Other invested assets - Policy loans		11
Reinsurance recoverables			9
Receivables from parent and affiliates			0
Other assets			2,275
Total assets			3,812
Liabilities:
Repurchase agreements		0
Cash collateral for loaned securities		0
Policyholders’ account balances - investment contracts			2,391
Payables to parent and affiliates			0
Other liabilities			0
Separate account liabilities - investment contracts			0
Total liabilities			2,391
Carrying Amount
Assets
Commercial mortgage and other loans			1,504
Policy loans			12
Short-term investments			81
Cash and cash equivalents			277
Accrued investment income		56	61
Other invested assets - Policy loans		11
Reinsurance recoverables			8
Receivables from parent and affiliates			5
Other assets			2,279
Total assets			4,227
Liabilities:
Repurchase agreements		200
Cash collateral for loaned securities		$ 169
Policyholders’ account balances - investment contracts			2,381
Payables to parent and affiliates			36
Other liabilities			105
Separate account liabilities - investment contracts			0
Total liabilities			$ 2,522

[1] As of April 1, 2022 we have elected the fair value option for these financial statement line items. See Note 2 for further discussion.