v3.25.4
INCOME TAXES - Schedule of Reconciliation of Provision for Income Taxes and Expected Tax Provision (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Income Taxes [Line Items]      
Underwriting gain (loss) $ 211 $ (356) $ 1,219
Net investment income 2,124 1,954 1,434
Net realized capital gains (losses) (143) 19 (276)
Corporate expenses (109) (95) (73)
Interest, fee and bond issue cost amortization expense (151) (149) (134)
Other income (expense) (45) 121 (14)
INCOME (LOSS) BEFORE TAXES 1,887 1,493 2,154
Expected tax provision at Bermuda statutory tax rate 283    
Amount      
Tax exempt income (27)    
Changes in valuation allowances 0    
Total income tax expense (benefit) 296 120 (363)
Bermuda      
Income Taxes [Line Items]      
Underwriting gain (loss) 452    
Net investment income 628    
Net realized capital gains (losses) (54)    
Net derivative gain (loss) 0    
Corporate expenses (73)    
Interest, fee and bond issue cost amortization expense 0    
Other income (expense) (40)    
INCOME (LOSS) BEFORE TAXES 913    
Amount      
Other 12    
Non-Bermuda      
Income Taxes [Line Items]      
Underwriting gain (loss) (241)    
Net investment income 1,497    
Net realized capital gains (losses) (89)    
Net derivative gain (loss) 0    
Corporate expenses (36)    
Interest, fee and bond issue cost amortization expense (151)    
Other income (expense) (6)    
INCOME (LOSS) BEFORE TAXES 974    
United States      
Income Taxes [Line Items]      
Underwriting gain (loss)   (891) 533
Net investment income   1,219 954
Net realized capital gains (losses)   34 (190)
Net derivative gain (loss)   0 0
Corporate expenses   (19) (18)
Interest, fee and bond issue cost amortization expense   (150) (134)
Other income (expense)   64 (13)
INCOME (LOSS) BEFORE TAXES   257 1,132
Expected tax provision at Bermuda statutory tax rate   54 238
Amount      
Tax exempt income   (1) (3)
Dividend received deduction   (3) (2)
Proration   1 1
Affiliated preferred stock dividends   7 7
Creditable foreign premium tax   (14) (14)
Share-based compensation tax benefits formerly in APIC   (1) (3)
BEAT Tax   66 0
Changes in valuation allowances   0 0
Statutory tax rate difference between United Kingdom and Bermuda 64 0 0
Insurance corporate-owned life insurance   (18) (13)
Other $ 4 9 (3)
Total income tax expense (benefit)   100 208
Non-U.S.      
Income Taxes [Line Items]      
Underwriting gain (loss)   536 686
Net investment income   734 479
Net realized capital gains (losses)   (15) (86)
Net derivative gain (loss)   0 1
Corporate expenses   (76) (55)
Interest, fee and bond issue cost amortization expense   1 0
Other income (expense)   57 (3)
INCOME (LOSS) BEFORE TAXES   1,237 1,022
Expected tax provision at Bermuda statutory tax rate   19 26
Amount      
Tax exempt income   0 0
Dividend received deduction   0 0
Proration   0 0
Affiliated preferred stock dividends   0 0
Creditable foreign premium tax   0 0
Share-based compensation tax benefits formerly in APIC   0 0
BEAT Tax   0 0
Changes in valuation allowances   0 (13)
Statutory tax rate difference between United Kingdom and Bermuda   0 (578)
Insurance corporate-owned life insurance   0 0
Other   1 (6)
Total income tax expense (benefit)   $ 20 $ (571)