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FAIR VALUE DISCLOSURES - Quantitative Information about Level 3 (Details) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2024 USD ($) | Sep. 30, 2023 | Dec. 31, 2023 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Liability for market risk benefits | $ 12,814 |  | $ 14,612
Assets for market risk benefits | 818 |  | 591
Level 3 | Discounted cash flow | Alliance Bernstein |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
AB Contingent consideration payable | $ 254 |  | $ 253
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 | 0.104 |  | 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 | 0.046 |  | 0.046
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 | 0.293 |  | 0.839
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 | 0.079 |  | 0.103
Level 3 | Corporate | Matrix pricing model |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value of fixed maturities AFS | $ 350 |  | $ 373
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 | 0.0020 |  | 0.0020
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 | 0.0270 |  | 0.0747
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 | 0.0145 |  | 0.0181
Level 3 | Corporate | Market comparable companies |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value of fixed maturities AFS | $ 1,172 |  | $ 979
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 | 3.3 |  | 3.3
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 | 30.5 |  | 29.0
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 | 13.5 |  | 13.6
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 | 0.000 |  | 0.000
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 | 0.192 |  | 0.228
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 | 0.038 |  | 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 | 0.8 |  | 0.8
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 | 9.3 |  | 10.0
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 | 6.2 |  | 6.3
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 | 0.000 |  | 0.034
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 | 0.614 |  | 0.610
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 | 0.140 |  | 0.138
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 | $ 61 |  | $ 61
Discount years | 7 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 | 9.1 |  | 9.1
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 |  | 0.1000
Level 3 | Other equity investments | Discounted cash flow |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value of fixed maturities AFS | $ 2 |  | $ 2
Level 3 | Other equity investments | Discounted cash flow | Earnings/Revenue Multiple | Minimum |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Percentage measurement input of equity securities | 3.9 |  | 3.9
Level 3 | Other equity investments | Discounted cash flow | Earnings/Revenue Multiple | Maximum |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Percentage measurement input of equity securities | 7.0 |  | 8.4
Level 3 | Other equity investments | Discounted cash flow | Earnings/Revenue Multiple | Weighted Average |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Percentage measurement input of equity securities | 5.9 |  | 6.5
Level 3 | Purchased MRB asset | Discounted cash flow |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value of fixed maturities AFS | $ 8,337 |  | $ 9,427
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 | 0.0021 |  | 0.0021
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 | 0.1238 |  | 0.1238
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 | 0.0196 |  | 0.0179
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 | 0.0007 |  | 0.0007
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 | 0.1497 |  | 0.1497
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 | 0.0050 |  | 0.0046
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 | 0.6621 |  | 0.6621
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 | 0.0691 |  | 0.0744
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 | 0.0032 |  | 0.0035
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 | 0.0101 |  | 0.0097
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 | 0.0040 |  | 0.0045
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 | 0.12 |  | 0.11
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 | 0.28 |  | 0.28
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 | 0.0018 |  | 0.0018
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 | 0.0325 |  | 0.0307
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 | 0.0007 |  | 0.0007
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 | 0.0053 |  | 0.0053
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 | 0.0033 |  | 0.0033
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 | 0.4200 |  | 0.4200
Level 3 | Direct MRB | Discounted cash flow |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Direct MRB | $ 11,996 |  | $ 14,021
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 | 0.0021 |  | 0.0021
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 | 0.2937 |  | 0.2937
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 | 0.0320 |  | 0.0307
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 | 0.1497 |  | 0.1497
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 | 0.0067 |  | 0.0064
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 | 0.0117 |  | 0.0118
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 | 0.0117 |  | 0.0118
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 | 0.0018 |  | 0.0018
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 | 0.0267 |  | 0.0250
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 | 0.0007 |  | 0.0007
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 | 0.0053 |  | 0.0053
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 | 0.0033 |  | 0.0033
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 | 0.4200 |  | 0.4200
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 | 0.0515 |  | 0.0538

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