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STATUTORY FINANCIAL INFORMATION (Details) |  | 12 Months Ended
--- | --- | ---
Jan. 01, 2019 | Dec. 31, 2019 USD ($) board_member | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Statutory Financial Information [Line Items] |  |  |  |
Statutory net income |  | $ 364,000,000 | $ 268,000,000 | $ (94,000,000)
Axis Corporate Capital UK Limited II |  |  |  |
Statutory Financial Information [Line Items] |  |  |  |
Capital support, percentage | 30.00% | 30.00% |  |
Axis Corporate Capital UK Limited |  |  |  |
Statutory Financial Information [Line Items] |  |  |  |
Capital support, percentage | 70.00% | 70.00% |  |
Axis Corporate Capital UK Limited | Cash |  |  |  |
Statutory Financial Information [Line Items] |  |  |  |
Financial instruments, as collateral, at fair value |  | $ 22,000,000 | 8,000,000 |
Axis Corporate Capital UK Limited | Fixed maturities and short-term investments |  |  |  |
Statutory Financial Information [Line Items] |  |  |  |
Financial instruments, as collateral, at fair value |  | 725,000,000 | 715,000,000 |
Axis Corporate Capital UK II Limited |  |  |  |
Statutory Financial Information [Line Items] |  |  |  |
Financial instruments, as collateral, released from restriction |  | 47,000,000 |  |
Axis Corporate Capital UK II Limited | Cash |  |  |  |
Statutory Financial Information [Line Items] |  |  |  |
Financial instruments, as collateral, at fair value |  | 5,000,000 | 16,000,000 |
Axis Corporate Capital UK II Limited | Fixed maturities and short-term investments |  |  |  |
Statutory Financial Information [Line Items] |  |  |  |
Financial instruments, as collateral, at fair value |  | 513,000,000 | 528,000,000 |
Axis Corporate Capital UK II Limited | Equity securities |  |  |  |
Statutory Financial Information [Line Items] |  |  |  |
Financial instruments, as collateral, at fair value |  | 49,000,000 | 40,000,000 |
Bermuda |  |  |  |
Statutory Financial Information [Line Items] |  |  |  |
Required statutory capital and surplus |  | 1,502,153,000 | 1,470,375,000 |
Available statutory capital and surplus |  | 3,288,752,000 | 3,513,342,000 |
Minimum solvency margin amount |  | $ 100,000,000 |  |
Minimum solvency margin percentage of net written premiums |  | 50.00% |  |
Minimum solvency margin percentage of net reserves |  | 15.00% |  |
Minimum solvency margin percentage of ECR |  | 25.00% |  |
Limit - prior year's total statutory capital surplus (Bermuda) |  | 25.00% |  |
Number of directors required to sign affidavits in order to pay dividend/distribution greater than 25% of prior year statutory capital and surplus | board_member |  | 2 |  |
Maximum dividend/distribution payable without regulatory approval |  | $ 844,000,000 | 864,000,000 |
Ireland |  |  |  |
Statutory Financial Information [Line Items] |  |  |  |
Required statutory capital and surplus |  | 719,405,000 | 637,226,000 |
Available statutory capital and surplus |  | 1,069,621,000 | 896,868,000 |
Maximum dividend/distribution payable with regulatory approval |  | 70,000,000 | 37,000,000 |
U.S. |  |  |  |
Statutory Financial Information [Line Items] |  |  |  |
Required statutory capital and surplus |  | 500,750,000 | 489,560,000 |
Available statutory capital and surplus |  | 1,713,013,000 | 1,668,847,000 |
Maximum dividend/distribution payable without regulatory approval |  | $ 141,000,000 | $ 130,000,000 |
Maximum dividend limit - percentage of total statutory capital and surplus |  | 10.00% |  |

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