INVESTMENTS - Additional Information (Detail) $ in Millions		12 Months Ended
		Dec. 31, 2024 USD ($) investment	Dec. 31, 2023 USD ($) investment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Schedule of Investments [Line Items]
Held to maturity securities transferred to available for sale securities, number of investments | investment		0	0
Equity securities, FV-NI, unrealized gain (loss)		$ 118	$ 63	$ (340)
Transitional real estate loan commitments		273
Middle market loan commitments		739
Other loans commitments		1
Nonaccrual loans, interest income		2	0	0
Financing receivable, modified, commitment to lend		14
Fixed maturity securities, held-to-maturity, amortized cost		15,971	17,824
Financing receivable, allowance for credit loss		355	274
Real estate owned, held-and-used			210
Real estate owned, held-for-sale			17
REO, accumulated depreciation		14
Limited partnerships investment commitments		$ 2,800	2,300
Percentage that the lending policy requires that the fair value of the securities and/or unrestricted cash received as collateral be of the fair value of the loaned securities		102.00%
Percentage that the lending policy requires that the fair value of the unrestricted cash received as collateral be of the fair value of the loaned securities		100.00%
Securities received as collateral		$ 3,000	4,300
Repurchase agreements and repurchase to maturity transactions outstanding		0	0
Fair value of debt securities on deposit with regulatory authorities in the United States and Japan		20
Variable Interest Entity, Not Consolidated
Schedule of Investments [Line Items]
Limited partnerships investment commitments		2,100	2,000
Real estate owned
Schedule of Investments [Line Items]
Depreciation		13
Transitional real estate loans
Schedule of Investments [Line Items]
Nonaccrual loans, no allowance		140	160
Financing receivable, allowance for credit loss		199	112	54	$ 68
Transitional real estate loans | Potential Foreclosure or Deed-in-lieu Foreclosure
Schedule of Investments [Line Items]
Loans in anticipation of potential foreclosure or deed in lieu of foreclosure		390
Financing receivable, allowance for credit loss		57
Middle market loans
Schedule of Investments [Line Items]
Nonaccrual loans, no allowance		5	0
Financing receivable, allowance for credit loss		140	146	129	96
Middle market loans | Extended maturity and interest rate reduction
Schedule of Investments [Line Items]
Loan modification, amortized cost	[1]	15
Commercial mortgage loans
Schedule of Investments [Line Items]
Financing receivable, allowance for credit loss		$ 14	$ 16	$ 9	$ 10
California | Commercial mortgage and transitional real estate loans | Mortgages
Schedule of Investments [Line Items]
Concentration Risk, Percentage		21.00%
Texas | Commercial mortgage and transitional real estate loans | Mortgages
Schedule of Investments [Line Items]
Concentration Risk, Percentage		13.00%
Florida | Commercial mortgage and transitional real estate loans | Mortgages
Schedule of Investments [Line Items]
Concentration Risk, Percentage		10.00%
Japan government and agencies | Zero-credit-loss expectation
Schedule of Investments [Line Items]
Fixed maturity securities, held-to-maturity, amortized cost		$ 15,200

[1] Net of allowance for credit losses