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ACQUISITION - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 2 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | --- | ---
May 02, 2024 | Nov. 16, 2023 | Jun. 30, 2024 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Goodwill |  |  | $ 751 | $ 751 |  | $ 751 |  | $ 121
AEL |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Cash consideration transferred | $ 3,992 |  |  |  |  |  |  |
Cash | 2,525 |  |  |  |  |  |  |
BAM Shares transferred by the Company | 1,111 |  |  |  |  |  |  |
Goodwill | 630 |  | 630 | 630 |  | 630 |  |
Contributed revenues |  |  | 564 |  |  |  |  |
Loss of acquiree since acquisition |  |  | 15 |  |  |  |  |
Consolidated unaudited pro forma revenue |  |  |  | 3,100 | $ 2,700 | 7,000 | $ 4,500 |
Consolidated unaudited pro forma net profit (loss) |  |  |  | 610 | $ 401 | 1,800 | $ 349 |
Settlement loss | 48 |  |  |  |  |  |  |
Additional market risk benefits AOCI loss | 66 |  |  |  |  |  |  |
Gain on disposal on pre-existing equity interest fair value | 4 |  |  |  |  |  |  |
Acquisition costs | $ 127 |  |  |  |  |  |  |
Argo Group International Holdings |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Cash consideration transferred |  | $ 1,059 |  |  |  |  |  |
Voting interests acquired |  | 100.00% |  |  |  |  |  |
Share price (in dollars per share) |  | $ 30 |  |  |  |  |  |
Deferred gain on bargain purchase |  | $ 51 | $ 51 | $ 51 |  | $ 51 |  |

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