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SIGNIFICANT ACCOUNTING POLICIES - Policyholders' Account Balances and Future Policy Benefits and Various Policies (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Liability For Future Policy Benefits Assumptions [Line Items] |  |  |
Percentage of life insurance liabilities calculate within traditional life interest rate range | 99.50% |  |
Capitalized Computer Software and Hosting Arrangements [Abstract] |  |  |
Computer software and hosting arrangements | $ 224 | $ 193 |
Amortization of computer software and hosting arrangements | $ 45 | 57 | $ 60
US Fund Shares Deferred Sales Commissions, Net |  |  |
Capitalized Computer Software and Hosting Arrangements [Abstract] |  |  |
Capitalized contract cost, amortization period | 5 years 6 months |  |
Non-US Fund Shares Deferred Sales Commissions, Net |  |  |
Capitalized Computer Software and Hosting Arrangements [Abstract] |  |  |
Capitalized contract cost, amortization period | 4 years |  |
Alliance Bernstein | Deferred Sales Commissions |  |  |
Capitalized Computer Software and Hosting Arrangements [Abstract] |  |  |
Gross carrying amount of AllianceBernstein related intangible assets | $ 52 | $ 75 |
Amortization expense, year two | 29 |  |
Amortization expense, year three | 18 |  |
Amortization expense, year four | $ 5 |  |
Minimum | Life Insurance Liabilities |  |  |
Liability For Future Policy Benefits Assumptions [Line Items] |  |  |
Liability for future policy benefits, interest rate | 3.50% |  |
Minimum | Annuity Liabilities |  |  |
Liability For Future Policy Benefits Assumptions [Line Items] |  |  |
Liability for policyholder contract deposits, interest rate | 1.50% |  |
Minimum | Computer Software, Intangible Asset |  |  |
Capitalized Computer Software and Hosting Arrangements [Abstract] |  |  |
Intangible asset useful life | 3 years |  |
Minimum | Alliance Bernstein |  |  |
Capitalized Computer Software and Hosting Arrangements [Abstract] |  |  |
Intangible asset useful life | 6 years |  |
Maximum | Life Insurance Liabilities |  |  |
Liability For Future Policy Benefits Assumptions [Line Items] |  |  |
Liability for future policy benefits, interest rate | 7.30% |  |
Maximum | Annuity Liabilities |  |  |
Liability For Future Policy Benefits Assumptions [Line Items] |  |  |
Liability for policyholder contract deposits, interest rate | 5.40% |  |
Maximum | Computer Software, Intangible Asset |  |  |
Capitalized Computer Software and Hosting Arrangements [Abstract] |  |  |
Intangible asset useful life | 5 years |  |
Maximum | Alliance Bernstein |  |  |
Capitalized Computer Software and Hosting Arrangements [Abstract] |  |  |
Intangible asset useful life | 20 years |  |
Weighted Average | Life Insurance Liabilities |  |  |
Liability For Future Policy Benefits Assumptions [Line Items] |  |  |
Liability for future policy benefits, interest rate | 5.00% |  |
Weighted Average | Annuity Liabilities |  |  |
Liability For Future Policy Benefits Assumptions [Line Items] |  |  |
Liability for policyholder contract deposits, interest rate | 3.60% |  |

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