POLICYHOLDER ACCOUNT BALANCES - Aggregate Fair Value of Separate Account Assets (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Policyholder Account Balance [Line Items]
Separate Accounts assets	$ 143,006	$ 136,544
Debt securities
Policyholder Account Balance [Line Items]
Separate Accounts assets	71	71
Common Stock
Policyholder Account Balance [Line Items]
Separate Accounts assets	2,714	2,509
Mutual Funds
Policyholder Account Balance [Line Items]
Separate Accounts assets	138,979	132,751
Bonds and Notes
Policyholder Account Balance [Line Items]
Separate Accounts assets	1,242	1,213
Retirement
Policyholder Account Balance [Line Items]
Separate Accounts assets	88,108	83,570
Retirement \| Debt securities
Policyholder Account Balance [Line Items]
Separate Accounts assets	17	16
Retirement \| Common Stock
Policyholder Account Balance [Line Items]
Separate Accounts assets	655	573
Retirement \| Mutual Funds
Policyholder Account Balance [Line Items]
Separate Accounts assets	87,432	82,973
Retirement \| Bonds and Notes
Policyholder Account Balance [Line Items]
Separate Accounts assets	4	8
Corporate & Other \| Legacy
Policyholder Account Balance [Line Items]
Separate Accounts assets	28,383	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	28,383	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	22,790	21,077
Corporate & Other \| Life \| Debt securities
Policyholder Account Balance [Line Items]
Separate Accounts assets	42	43
Corporate & Other \| Life \| Common Stock
Policyholder Account Balance [Line Items]
Separate Accounts assets	78	73
Corporate & Other \| Life \| Mutual Funds
Policyholder Account Balance [Line Items]
Separate Accounts assets	22,580	20,870
Corporate & Other \| Life \| Bonds and Notes
Policyholder Account Balance [Line Items]
Separate Accounts assets	90	91
Corporate & Other \| Other
Policyholder Account Balance [Line Items]
Separate Accounts assets	3,725	3,621
Corporate & Other \| Other \| Debt securities
Policyholder Account Balance [Line Items]
Separate Accounts assets	12	12
Corporate & Other \| Other \| Common Stock
Policyholder Account Balance [Line Items]
Separate Accounts assets	1,981	1,863
Corporate & Other \| Other \| Mutual Funds
Policyholder Account Balance [Line Items]
Separate Accounts assets	584	632
Corporate & Other \| Other \| Bonds and Notes
Policyholder Account Balance [Line Items]
Separate Accounts assets	$ 1,148	$ 1,114