Future Policy Benefits - FPB on Balance Sheet (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025
Net liability for FPBs	$ 206,628	$ 208,855
Fixed & Immediate Annuities \| RIS
Net liability for FPBs	78,651	79,523	$ 68,146
Whole and Term Life & Endowments \| Asia
Net liability for FPBs	9,236	10,140	11,565
Accident & health insurance \| Asia
Net liability for FPBs	7,259	7,913	9,679
Fixed Annuity \| Latin America
Net liability for FPBs	12,453	12,336	10,388
Long-term Care \| Corporate And Other
Net liability for FPBs	14,978	15,224	$ 14,716
Fixed & Immediate Annuities for Deferred Profit Liabilities \| RIS
Net liability for FPBs	3,877	3,855
Whole and Term Life & Endowments for Deferred Profit Liabilities \| Asia
Net liability for FPBs	915	919
Accident and Health Insurance Product Line for Deferred Profit Liabilities \| Asia
Net liability for FPBs	984	993
Fixed Annuity for Deferred Profit Liabilities \| Latin America
Net liability for FPBs	540	562
Variable Life \| Asia
Net liability for FPBs	1,052	1,074
Universal and Variable Universal Life \| Asia
Net liability for FPBs	327	330
Universal and Variable Universal Life \| Corporate And Other
Net liability for FPBs	2,740	2,713
Participating Life Insurance Contract \| Corporate And Other
Net liability for FPBs	47,063	47,359
Long-Duration Insurance, Other
Net liability for FPBs	11,209	11,148
Short-Duration Insurance, Other
Net liability for FPBs	$ 15,344	$ 14,766