FAIR VALUE DISCLOSURES - Quantitative Information about Level 3 (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liability for market risk benefits	$ 10,864	$ 11,810	$ 12,612	$ 12,833	$ 14,630
Assets for market risk benefits	644	863	$ 799	$ 821	$ 594
Level 3 \| Discounted cash flow \| Alliance Bernstein
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
AB Contingent consideration payable	$ 8	$ 9
Level 3 \| Discounted cash flow \| Discount Rate \| Minimum \| Alliance Bernstein
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Expected revenue growth and discount rate	0.019	0.019
Level 3 \| Discounted cash flow \| Discount Rate \| Maximum \| Alliance Bernstein
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Expected revenue growth and discount rate	0.019	0.104
Level 3 \| Discounted cash flow \| Discount Rate \| Weighted Average \| Alliance Bernstein
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Expected revenue growth and discount rate	0.019	0.073
Level 3 \| Discounted cash flow \| Expected Revenue Growth Rate \| Minimum \| Alliance Bernstein
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Expected revenue growth and discount rate	0.020	0.020
Level 3 \| Discounted cash flow \| Expected Revenue Growth Rate \| Maximum \| Alliance Bernstein
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Expected revenue growth and discount rate	0.133	0.293
Level 3 \| Discounted cash flow \| Expected Revenue Growth Rate \| Weighted Average \| Alliance Bernstein
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Expected revenue growth and discount rate	0.068	0.055
Level 3 \| Corporate \| Matrix pricing model
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of fixed maturities AFS		$ 402
Level 3 \| Corporate \| Matrix pricing model \| Spread over Benchmark \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities		0.0070
Level 3 \| Corporate \| Matrix pricing model \| Spread over Benchmark \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities		0.0220
Level 3 \| Corporate \| Matrix pricing model \| Spread over Benchmark \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities		0.0153
Level 3 \| Corporate \| Market comparable companies
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of fixed maturities AFS	$ 1,050	$ 981
Level 3 \| Corporate \| Market comparable companies \| EBITDA Multiples \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	1.0	4.7
Level 3 \| Corporate \| Market comparable companies \| EBITDA Multiples \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	36.5	36.5
Level 3 \| Corporate \| Market comparable companies \| EBITDA Multiples \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	10.8	12.2
Level 3 \| Corporate \| Market comparable companies \| Discount Rate \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.079	0.084
Level 3 \| Corporate \| Market comparable companies \| Discount Rate \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.187	0.349
Level 3 \| Corporate \| Market comparable companies \| Discount Rate \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.035	0.039
Level 3 \| Corporate \| Market comparable companies \| Cash Flow Multiples \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	1.8	1.8
Level 3 \| Corporate \| Market comparable companies \| Cash Flow Multiples \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	13.0	11.8
Level 3 \| Corporate \| Market comparable companies \| Cash Flow Multiples \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	4.4	4.5
Level 3 \| Corporate \| Market comparable companies \| Loan to Value \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	(0.017)	0.000
Level 3 \| Corporate \| Market comparable companies \| Loan to Value \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.546	0.564
Level 3 \| Corporate \| Market comparable companies \| Loan to Value \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.087	0.150
Level 3 \| Trading Securities, at Fair Value \| Market comparable companies
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of fixed maturities AFS	$ 1	$ 1
Level 3 \| Trading Securities, at Fair Value \| Market comparable companies \| Cash Flow Multiples \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	6.0
Level 3 \| Trading Securities, at Fair Value \| Market comparable companies \| Cash Flow Multiples \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	8.4	8.4
Level 3 \| Trading Securities, at Fair Value \| Market comparable companies \| Cash Flow Multiples \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	8.4	8.4
Level 3 \| Trading Securities, at Fair Value \| Discounted cash flow
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of fixed maturities AFS	$ 75	$ 75
Discount years	7 years
Level 3 \| Trading Securities, at Fair Value \| Discounted cash flow \| Earnings/Revenue Multiple
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	8.6	8.6
Level 3 \| Trading Securities, at Fair Value \| Discounted cash flow \| Discount Factor
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.100	0.100
Level 3 \| Purchased MRB asset \| Discounted cash flow
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of fixed maturities AFS	$ 5,976	$ 7,376
Level 3 \| Purchased MRB asset \| Discounted cash flow \| Lapse Rate \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.0024	0.0024
Level 3 \| Purchased MRB asset \| Discounted cash flow \| Lapse Rate \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.1305	0.1305
Level 3 \| Purchased MRB asset \| Discounted cash flow \| Lapse Rate \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.0200	0.0217
Level 3 \| Purchased MRB asset \| Discounted cash flow \| Withdrawal Rate \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.0006	0.0006
Level 3 \| Purchased MRB asset \| Discounted cash flow \| Withdrawal Rate \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.1165	0.1165
Level 3 \| Purchased MRB asset \| Discounted cash flow \| Withdrawal Rate \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.0059	0.0048
Level 3 \| Purchased MRB asset \| Discounted cash flow \| GMIB Utilization Rate \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.0004	0.0004
Level 3 \| Purchased MRB asset \| Discounted cash flow \| GMIB Utilization Rate \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.6670	0.6670
Level 3 \| Purchased MRB asset \| Discounted cash flow \| GMIB Utilization Rate \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.0677	0.0675
Level 3 \| Purchased MRB asset \| Discounted cash flow \| Non-Performance Risk \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0	0.0033
Level 3 \| Purchased MRB asset \| Discounted cash flow \| Non-Performance Risk \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.0097	0.0093
Level 3 \| Purchased MRB asset \| Discounted cash flow \| Non-Performance Risk \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.0007	0.0034
Level 3 \| Purchased MRB asset \| Discounted cash flow \| Volatility Rate - Equity \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.15	0.12
Level 3 \| Purchased MRB asset \| Discounted cash flow \| Volatility Rate - Equity \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.30	0.29
Level 3 \| Purchased MRB asset \| Discounted cash flow \| Volatility Rate - Equity \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.23	0.23
Level 3 \| Purchased MRB asset \| Discounted cash flow \| Mortality \| Ages 0 - 40 \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.0001	0.0001
Level 3 \| Purchased MRB asset \| Discounted cash flow \| Mortality \| Ages 0 - 40 \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.0017	0.0017
Level 3 \| Purchased MRB asset \| Discounted cash flow \| Mortality \| Ages 0 - 40 \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.0319	0.0336
Level 3 \| Purchased MRB asset \| Discounted cash flow \| Mortality \| Ages 41 - 60 \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.0006	0.0006
Level 3 \| Purchased MRB asset \| Discounted cash flow \| Mortality \| Ages 41 - 60 \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.0052	0.0052
Level 3 \| Purchased MRB asset \| Discounted cash flow \| Mortality \| Ages 61 - 115 \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.0032	0.0032
Level 3 \| Purchased MRB asset \| Discounted cash flow \| Mortality \| Ages 61 - 115 \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage measurement input of equity securities	0.4120	0.4120
Level 3 \| Direct MRB \| Discounted cash flow
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Direct MRB	$ 10,220	$ 10,947
Level 3 \| Direct MRB \| Discounted cash flow \| Lapse Rate \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input of servicing liability	0.0024	0.0024
Level 3 \| Direct MRB \| Discounted cash flow \| Lapse Rate \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input of servicing liability	0.3618	0.3618
Level 3 \| Direct MRB \| Discounted cash flow \| Lapse Rate \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input of servicing liability	0.0358	0.0357
Level 3 \| Direct MRB \| Discounted cash flow \| Withdrawal Rate \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input of servicing liability	0.0000	0.0000
Level 3 \| Direct MRB \| Discounted cash flow \| Withdrawal Rate \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input of servicing liability	0.1165	0.1165
Level 3 \| Direct MRB \| Discounted cash flow \| Withdrawal Rate \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input of servicing liability	0.0075	0.0058
Level 3 \| Direct MRB \| Discounted cash flow \| Non-Performance Risk
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input of servicing liability	0.0116	0.0094
Level 3 \| Direct MRB \| Discounted cash flow \| Non-Performance Risk \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input of servicing liability	0.0116	0.0094
Level 3 \| Direct MRB \| Discounted cash flow \| Mortality \| Ages 0 - 40 \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input of servicing liability	0.0001	0.0001
Level 3 \| Direct MRB \| Discounted cash flow \| Mortality \| Ages 0 - 40 \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input of servicing liability	0.0017	0.0017
Level 3 \| Direct MRB \| Discounted cash flow \| Mortality \| Ages 0 - 40 \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input of servicing liability	0.0287	0.0300
Level 3 \| Direct MRB \| Discounted cash flow \| Mortality \| Ages 41 - 60 \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input of servicing liability	0.0006	0.0006
Level 3 \| Direct MRB \| Discounted cash flow \| Mortality \| Ages 41 - 60 \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input of servicing liability	0.0052	0.0052
Level 3 \| Direct MRB \| Discounted cash flow \| Mortality \| Ages 61 - 115 \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input of servicing liability	0.0032	0.0032
Level 3 \| Direct MRB \| Discounted cash flow \| Mortality \| Ages 61 - 115 \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input of servicing liability	0.4120	0.4120
Level 3 \| Direct MRB \| Discounted cash flow \| Annuitization Rate \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input of servicing liability	0.0004	0.0004
Level 3 \| Direct MRB \| Discounted cash flow \| Annuitization Rate \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input of servicing liability	1.0000	1.0000
Level 3 \| Direct MRB \| Discounted cash flow \| Annuitization Rate \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input of servicing liability	0.0525	0.0515