FAIR VALUE MEASUREMENTS - Fair Value Hierarchy Levels of Assets and Liabilities Carried at Cost or Amortized Cost (Detail) - USD ($) $ in Millions	Dec. 31, 2024		Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other investments	$ 5,958		$ 4,530
Assets:
Fixed maturity securities, held-to-maturity, amortized cost	15,971		17,824
Fixed maturity securities, held-to-maturity, fair value	16,772		19,657
Commercial mortgage and other loans	10,869		12,527
Commercial mortgage and other loans, fair value	10,653		12,217
Other investments, carried at amortized cost	39	[1]	35	[2]
Other investments, carried at amortized cost, fair value	39	[1]	35	[2]
Total financial instruments, assets, not carried at fair value	26,874		30,381
Assets, fair value disclosure, financial instruments, carried at cost	27,464		31,909
Liabilities:
Other policyholders’ funds	5,460		6,169
Other policyholders' funds fair value disclosure	5,389		6,080
Notes payable	7,402		7,240
Notes payable, fair value disclosure	7,027		6,930
Total financial instrument liabilities not carried at fair value	12,862		13,409
Liabilities fair value disclosure financial instruments carried at cost	12,416		13,010
Government and agencies
Assets:
Fixed maturity securities, held-to-maturity, amortized cost	15,309		17,083
Fixed maturity securities, held-to-maturity, fair value	16,059		18,829
Municipalities
Assets:
Fixed maturity securities, held-to-maturity, amortized cost	235		266
Fixed maturity securities, held-to-maturity, fair value	257		307
Public utilities
Assets:
Fixed maturity securities, held-to-maturity, amortized cost	32		34
Fixed maturity securities, held-to-maturity, fair value	33		38
Sovereign and supranational
Assets:
Fixed maturity securities, held-to-maturity, amortized cost	374		418
Fixed maturity securities, held-to-maturity, fair value	405		462
Other corporate
Assets:
Fixed maturity securities, held-to-maturity, amortized cost	16		18
Fixed maturity securities, held-to-maturity, fair value	18		21
Policy loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other investments	203		214
Real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other investments	682		227
Equity method investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other investments	3,435		2,750
Level 1
Assets:
Fixed maturity securities, held-to-maturity, fair value	15,916		18,662
Commercial mortgage and other loans, fair value	0		0
Other investments, carried at amortized cost, fair value	0	[1]	0	[2]
Assets, fair value disclosure, financial instruments, carried at cost	15,916		18,662
Liabilities:
Other policyholders' funds fair value disclosure	0		0
Notes payable, fair value disclosure	0		0
Liabilities fair value disclosure financial instruments carried at cost	0		0
Level 1 | Government and agencies
Assets:
Fixed maturity securities, held-to-maturity, fair value	15,916		18,662
Level 1 | Municipalities
Assets:
Fixed maturity securities, held-to-maturity, fair value	0		0
Level 1 | Public utilities
Assets:
Fixed maturity securities, held-to-maturity, fair value	0		0
Level 1 | Sovereign and supranational
Assets:
Fixed maturity securities, held-to-maturity, fair value	0		0
Level 1 | Other corporate
Assets:
Fixed maturity securities, held-to-maturity, fair value	0		0
Level 2
Assets:
Fixed maturity securities, held-to-maturity, fair value	856		995
Commercial mortgage and other loans, fair value	0		0
Other investments, carried at amortized cost, fair value	39	[1]	35	[2]
Assets, fair value disclosure, financial instruments, carried at cost	895		1,030
Liabilities:
Other policyholders' funds fair value disclosure	0		0
Notes payable, fair value disclosure	6,352		6,178
Liabilities fair value disclosure financial instruments carried at cost	6,352		6,178
Level 2 | Government and agencies
Assets:
Fixed maturity securities, held-to-maturity, fair value	143		167
Level 2 | Municipalities
Assets:
Fixed maturity securities, held-to-maturity, fair value	257		307
Level 2 | Public utilities
Assets:
Fixed maturity securities, held-to-maturity, fair value	33		38
Level 2 | Sovereign and supranational
Assets:
Fixed maturity securities, held-to-maturity, fair value	405		462
Level 2 | Other corporate
Assets:
Fixed maturity securities, held-to-maturity, fair value	18		21
Level 3
Assets:
Fixed maturity securities, held-to-maturity, fair value	0		0
Commercial mortgage and other loans, fair value	10,653		12,217
Other investments, carried at amortized cost, fair value	0	[1]	0	[2]
Assets, fair value disclosure, financial instruments, carried at cost	10,653		12,217
Liabilities:
Other policyholders' funds fair value disclosure	5,389		6,080
Notes payable, fair value disclosure	675		752
Liabilities fair value disclosure financial instruments carried at cost	6,064		6,832
Level 3 | Government and agencies
Assets:
Fixed maturity securities, held-to-maturity, fair value	0		0
Level 3 | Municipalities
Assets:
Fixed maturity securities, held-to-maturity, fair value	0		0
Level 3 | Public utilities
Assets:
Fixed maturity securities, held-to-maturity, fair value	0		0
Level 3 | Sovereign and supranational
Assets:
Fixed maturity securities, held-to-maturity, fair value	0		0
Level 3 | Other corporate
Assets:
Fixed maturity securities, held-to-maturity, fair value	$ 0		$ 0

[1] Excludes policy loans of $203, equity method investments of $3,435, and REO of $682, at carrying value.

[2] Excludes policy loans of $214, equity method investments of $2,750, and REO of $227, at carrying value.