FAIR VALUE MEASUREMENTS - Fair Value Hierarchy Levels of Assets and Liabilities Carried at Cost or Amortized Cost (Detail) - USD ($) $ in Millions		Dec. 31, 2025		Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other investments		$ 6,622		$ 5,958
Assets:
Fixed maturity securities, held-to-maturity, amortized cost		16,125		15,971
Fixed maturity securities, held-to-maturity, fair value		15,476		16,772
Commercial mortgage and other loans		9,765		10,869
Commercial mortgage and other loans, fair value		9,617		10,653
Other investments, carried at amortized cost		28	[1]	39	[2]
Other investments, carried at amortized cost, fair value		28	[1]	39	[2]
Total financial instruments, assets, not carried at fair value		25,913		26,874
Assets, fair value disclosure, financial instruments, carried at cost		25,121		27,464
Liabilities:
Other policyholders’ funds		5,445		5,460
Other policyholders' funds fair value disclosure		5,376		5,389
Notes payable		8,330		7,402
Notes payable, fair value disclosure		7,849		7,027
Total financial instrument liabilities not carried at fair value		13,775		12,862
Liabilities fair value disclosure financial instruments carried at cost		13,225		12,416
Government and agencies
Assets:
Fixed maturity securities, held-to-maturity, amortized cost		15,459		15,309
Fixed maturity securities, held-to-maturity, fair value		14,827		16,059
Municipalities
Assets:
Fixed maturity securities, held-to-maturity, amortized cost		235		235
Fixed maturity securities, held-to-maturity, fair value		229		257
Public utilities
Assets:
Fixed maturity securities, held-to-maturity, amortized cost		32		32
Fixed maturity securities, held-to-maturity, fair value		29		33
Sovereign and supranational
Assets:
Fixed maturity securities, held-to-maturity, amortized cost		378		374
Fixed maturity securities, held-to-maturity, fair value		375		405
Other corporate
Assets:
Fixed maturity securities, held-to-maturity, amortized cost		16		16
Fixed maturity securities, held-to-maturity, fair value		16		18
Policy loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other investments		210		203
Limited partnerships
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other investments	[3]	4,109		3,435
Real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other investments		902		682
Level 1
Assets:
Fixed maturity securities, held-to-maturity, fair value		14,696		15,916
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		14,696		15,916
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		14,696		15,916
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		780		856
Commercial mortgage and other loans, fair value		0		0
Other investments, carried at amortized cost, fair value		28	[1]	39	[2]
Assets, fair value disclosure, financial instruments, carried at cost		808		895
Liabilities:
Other policyholders' funds fair value disclosure		0		0
Notes payable, fair value disclosure		7,167		6,352
Liabilities fair value disclosure financial instruments carried at cost		7,167		6,352
Level 2 | Government and agencies
Assets:
Fixed maturity securities, held-to-maturity, fair value		131		143
Level 2 | Municipalities
Assets:
Fixed maturity securities, held-to-maturity, fair value		229		257
Level 2 | Public utilities
Assets:
Fixed maturity securities, held-to-maturity, fair value		29		33
Level 2 | Sovereign and supranational
Assets:
Fixed maturity securities, held-to-maturity, fair value		375		405
Level 2 | Other corporate
Assets:
Fixed maturity securities, held-to-maturity, fair value		16		18
Level 3
Assets:
Fixed maturity securities, held-to-maturity, fair value		0		0
Commercial mortgage and other loans, fair value		9,617		10,653
Other investments, carried at amortized cost, fair value		0	[1]	0	[2]
Assets, fair value disclosure, financial instruments, carried at cost		9,617		10,653
Liabilities:
Other policyholders' funds fair value disclosure		5,376		5,389
Notes payable, fair value disclosure		682		675
Liabilities fair value disclosure financial instruments carried at cost		6,058		6,064
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 $210, equity method investments of $4,109, and REO of $902, at carrying value

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

[3] Includes tax credit investments and asset classes such as private equity and real estate funds