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Policyholders' Account Balances (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025	Jun. 30, 2025
Policyholder Account Balance [Line Items]
Policyholders’ account balances	$ 202,223	$ 191,307	$ 180,931
FANIP \| Medium-term Notes
Policyholder Account Balance [Line Items]
Capacity	15,000
Debt instrument, face amount	$ 6,650		4,742
FANIP \| Medium-term Notes \| Minimum
Policyholder Account Balance [Line Items]
Interest rate	0.00%
Maturities	2 months
FANIP \| Medium-term Notes \| Maximum
Policyholder Account Balance [Line Items]
Interest rate	5.60%
Maturities	10 years
FANIP \| Commercial paper
Policyholder Account Balance [Line Items]
Capacity	$ 6,000
Debt instrument, face amount	$ 2,836		2,834
FANIP \| Commercial paper \| Minimum
Policyholder Account Balance [Line Items]
Interest rate	0.00%
Maturities	2 months
FANIP \| Commercial paper \| Maximum
Policyholder Account Balance [Line Items]
Interest rate	5.60%
Maturities	10 years
FANIP \| Retail Note liability
Policyholder Account Balance [Line Items]
Debt instrument, face amount	$ 631		257
FHLBNY \| Secured Debt
Policyholder Account Balance [Line Items]
Maturities	7 years
Debt instrument, face amount	$ 2,628		2,628
FHLBNY \| Secured Debt \| Minimum
Policyholder Account Balance [Line Items]
Interest rate	1.925%
FHLBNY \| Secured Debt \| Maximum
Policyholder Account Balance [Line Items]
Interest rate	4.51%
Retirement, C&O and International Businesses
Policyholder Account Balance [Line Items]
Policyholders’ account balances	$ 10,086		$ 7,801