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INCOME TAXES - Schedule of Reconciliation of Provision for Income Taxes and Expected Tax Provision (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Taxes [Line Items] |  |  |
Underwriting gain (loss) | $ 1,219 | $ 477 | $ 224
Net investment income | 1,434 | 830 | 1,165
Net realized capital gains (losses) | (276) | (455) | 258
Corporate expenses | (73) | (61) | (68)
Interest, fee and bond issue cost amortization expense | (134) | (101) | (70)
Other income (expense) | (14) | (102) | 37
INCOME (LOSS) BEFORE TAXES | 2,154 | 588 | 1,546
Increase (decrease) in taxes resulting from: |  |  |
Total income tax expense (benefit) | (363) | (9) | 167
U.S. |  |  |
Income Taxes [Line Items] |  |  |
Underwriting gain (loss) | 533 | (81) | (83)
Net investment income | 954 | 607 | 708
Net realized capital gains (losses) | (190) | (426) | 266
Net derivative gain (loss) | 0 | 0 | 0
Corporate expenses | (18) | (26) | (33)
Interest, fee and bond issue cost amortization expense | (134) | (101) | (70)
Other income (expense) | (13) | (6) | 23
INCOME (LOSS) BEFORE TAXES | 1,132 | (32) | 811
Expected tax provision at the applicable statutory rate(s) | 238 | (9) | 170
Increase (decrease) in taxes resulting from: |  |  |
Tax exempt income | (3) | (4) | (4)
Dividend received deduction | (2) | (3) | (1)
Proration | 1 | 1 | 1
Affiliated preferred stock dividends | 7 | 7 | 7
Creditable foreign premium tax | (14) | (11) | (13)
Tax audit settlement | 0 | 0 | 0
Share-based compensation tax benefits formerly in APIC | (3) | (3) | (2)
Valuation allowance | 0 | 0 | 0
Bermuda corporate income tax | 0 | 0 | 0
Insurance company-owned life insurance | (13) | (1) | 0
Other | (3) | 6 | 3
Total income tax expense (benefit) | 208 | (14) | 161
Non-U.S. |  |  |
Income Taxes [Line Items] |  |  |
Underwriting gain (loss) | 686 | 558 | 307
Net investment income | 479 | 223 | 457
Net realized capital gains (losses) | (86) | (29) | (8)
Net derivative gain (loss) | 1 | 0 | 3
Corporate expenses | (55) | (35) | (34)
Interest, fee and bond issue cost amortization expense | 0 | 0 | 0
Other income (expense) | (3) | (96) | 11
INCOME (LOSS) BEFORE TAXES | 1,022 | 620 | 735
Expected tax provision at the applicable statutory rate(s) | 26 | 0 | 14
Increase (decrease) in taxes resulting from: |  |  |
Tax exempt income | 0 | 0 | 0
Dividend received deduction | 0 | 0 | 0
Proration | 0 | 0 | 0
Affiliated preferred stock dividends | 0 | 0 | 0
Creditable foreign premium tax | 0 | 0 | 0
Tax audit settlement | 0 | 0 | 0
Share-based compensation tax benefits formerly in APIC | 0 | 0 | 0
Valuation allowance | (13) | 5 | (10)
Bermuda corporate income tax | (578) | 5 | 0
Insurance company-owned life insurance | 0 | 0 | 0
Other | (6) | 0 | 1
Total income tax expense (benefit) | $ (571) | $ 5 | $ 5

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