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FUTURE POLICY BENEFITS, POLICY AND CONTRACT CLAIMS AND POLICYHOLDERS' ACCOUNT BALANCES - Narratives (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Mar. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2021 | Dec. 31, 2020
VOBA |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |
Average useful life |  |  |  | 30 years |  |  |  |  |
American National |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |
Negative VOBA revenue | $ 223 |  |  |  |  |  |  |  |
American National | VOBA |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |
Negative VOBA revenue reminder of 2022 |  |  |  | $ 12 |  |  |  |  |
Amortization expense on intangible assets |  |  |  | 2 |  |  |  |  |
Additions, net of disposals |  |  |  | $ 781 |  |  |  |  |
Average useful life |  |  |  | 30 years |  |  |  |  |
Future Policy Benefits |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |
New business |  | $ 1,229 | $ 52 | $ 1,536 | $ 55 |  |  |  |
Normal changes |  | (500) | 10 | (829) | (76) |  |  |  |
Management actions and changes in assumptions |  | 16 | 2 | 53 | 7 |  |  |  |
Impact of foreign exchange |  | (70) | 13 | (49) | 28 |  |  |  |
Reinsurance Reserve, Net | 14,164 | 14,164 | $ 1,163 | 14,164 | $ 1,163 | $ 8,364 | $ 8,328 | $ 1,086 | $ 1,149
Policy and contract claims |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |
New business |  | 0 |  | 0 |  |  |  |  |
Normal changes |  | (199) |  | (199) |  |  |  |  |
Management actions and changes in assumptions |  | 13 |  | 13 |  |  |  |  |
Reinsurance Reserve, Net | $ 1,404 | $ 1,404 |  | $ 1,404 |  | $ 0 | $ 0 |  |

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