DERIVATIVES AND HEDGING - SUCCESSOR COMPANY - Impact of Derivatives by Operating Segment (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		$ (811)
Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)	$ 501	$ (912)	$ 6,124	$ (5,262)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Total	Total	Total	Total
Other income (loss)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)	$ 2	$ 101	$ 14	$ (25)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other income (loss)	Other income (loss)	Other income (loss)	Other income (loss)
Retained Business
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		$ (212)
Retained Business | Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		$ (221)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Total
Retained Business | Other income (loss)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		$ 9
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Other income (loss)
Retained Business | Interest Rate
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		$ (739)
Retained Business | Interest Rate | Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		(739)
Retained Business | Interest Rate | Other income (loss)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		0
Retained Business | Currency/Interest Rate
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		9
Retained Business | Currency/Interest Rate | Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		0
Retained Business | Currency/Interest Rate | Other income (loss)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		9
Retained Business | Credit
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		5
Retained Business | Credit | Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		5
Retained Business | Credit | Other income (loss)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		0
Retained Business | Equity
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		513
Retained Business | Equity | Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		513
Retained Business | Equity | Other income (loss)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		0
Ceded Business
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		(599)
Ceded Business | Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		$ (691)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Total
Ceded Business | Other income (loss)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		$ 92
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Other income (loss)
Ceded Business | Interest Rate
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		$ (58)
Ceded Business | Interest Rate | Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		(58)
Ceded Business | Interest Rate | Other income (loss)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		0
Ceded Business | Currency/Interest Rate
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		68
Ceded Business | Currency/Interest Rate | Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		(22)
Ceded Business | Currency/Interest Rate | Other income (loss)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		90
Ceded Business | Currency
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		2
Ceded Business | Currency | Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		0
Ceded Business | Currency | Other income (loss)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		2
Ceded Business | Credit
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		0
Ceded Business | Credit | Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		0
Ceded Business | Credit | Other income (loss)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		0
Ceded Business | Equity
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		(611)
Ceded Business | Equity | Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		(611)
Ceded Business | Equity | Other income (loss)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Gain/(Loss)		$ 0