POLICYHOLDER ACCOUNT BALANCES - Aggregate Fair Value of Separate Account Assets (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Policyholder Account Balance [Line Items]
Separate Accounts assets	$ 130,470	$ 136,544
Debt securities
Policyholder Account Balance [Line Items]
Separate Accounts assets	69	71
Common Stock
Policyholder Account Balance [Line Items]
Separate Accounts assets	2,445	2,509
Mutual Funds
Policyholder Account Balance [Line Items]
Separate Accounts assets	126,727	132,751
Bonds and Notes
Policyholder Account Balance [Line Items]
Separate Accounts assets	1,229	1,213
Retirement
Policyholder Account Balance [Line Items]
Separate Accounts assets	80,408	83,570
Retirement \| Debt securities
Policyholder Account Balance [Line Items]
Separate Accounts assets	15	16
Retirement \| Common Stock
Policyholder Account Balance [Line Items]
Separate Accounts assets	594	573
Retirement \| Mutual Funds
Policyholder Account Balance [Line Items]
Separate Accounts assets	79,793	82,973
Retirement \| Bonds and Notes
Policyholder Account Balance [Line Items]
Separate Accounts assets	6	8
Corporate & Other \| Legacy
Policyholder Account Balance [Line Items]
Separate Accounts assets	26,285	28,276
Corporate & Other \| Legacy \| Debt securities
Policyholder Account Balance [Line Items]
Separate Accounts assets	0	0
Corporate & Other \| Legacy \| Common Stock
Policyholder Account Balance [Line Items]
Separate Accounts assets	0	0
Corporate & Other \| Legacy \| Mutual Funds
Policyholder Account Balance [Line Items]
Separate Accounts assets	26,285	28,276
Corporate & Other \| Legacy \| Bonds and Notes
Policyholder Account Balance [Line Items]
Separate Accounts assets	0	0
Corporate & Other \| Life
Policyholder Account Balance [Line Items]
Separate Accounts assets	20,272	21,077
Corporate & Other \| Life \| Debt securities
Policyholder Account Balance [Line Items]
Separate Accounts assets	41	43
Corporate & Other \| Life \| Common Stock
Policyholder Account Balance [Line Items]
Separate Accounts assets	68	73
Corporate & Other \| Life \| Mutual Funds
Policyholder Account Balance [Line Items]
Separate Accounts assets	20,071	20,870
Corporate & Other \| Life \| Bonds and Notes
Policyholder Account Balance [Line Items]
Separate Accounts assets	92	91
Corporate & Other \| Other
Policyholder Account Balance [Line Items]
Separate Accounts assets	3,505	3,621
Corporate & Other \| Other \| Debt securities
Policyholder Account Balance [Line Items]
Separate Accounts assets	13	12
Corporate & Other \| Other \| Common Stock
Policyholder Account Balance [Line Items]
Separate Accounts assets	1,783	1,863
Corporate & Other \| Other \| Mutual Funds
Policyholder Account Balance [Line Items]
Separate Accounts assets	578	632
Corporate & Other \| Other \| Bonds and Notes
Policyholder Account Balance [Line Items]
Separate Accounts assets	$ 1,131	$ 1,114