SCHEDULE IV REINSURANCE Schedule IV - Reinsurance (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Gross Amount, Life Insurance in Force		$ 245,615	$ 187,553	$ 163,601
Ceded to Other Companies, Life Insurance in Force		13,495	13,481	15,592
Assumed from Other Companies, Life Insurance in Force		17,867	21,192	28,716
Net Amount, Life Insurance in Force		$ 249,987	$ 195,264	$ 176,725
Percentage of Amount Assumed to Net, Life Insurance in Force		7.00%	11.00%	16.00%
Gross amount		$ 13,760	$ 13,562	$ 14,318
Ceded to Other Companies		368	284	404
Assumed from Other companies		156	162	209
Net Amount	[1]	$ 13,548	$ 13,440	$ 14,123
Percentage of Amount Assumed to Net		1.00%	1.00%	1.00%
Health insurance
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Gross amount		$ 11,857	$ 11,784	$ 12,335
Ceded to Other Companies		316	233	352
Assumed from Other companies		132	135	167
Net Amount		$ 11,673	$ 11,686	$ 12,150
Percentage of Amount Assumed to Net		1.00%	1.00%	1.00%
Life insurance
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Gross amount		$ 1,903	$ 1,778	$ 1,983
Ceded to Other Companies		52	51	52
Assumed from Other companies		24	27	42
Net Amount		$ 1,875	$ 1,754	$ 1,973
Percentage of Amount Assumed to Net		1.00%	2.00%	2.00%

[1] Includes a gain (loss) of $(52), $(81) and $20 in 2025, 2024 and 2023, respectively, related to remeasurement of the deferred profit liability for limited-payment contracts.