v3.26.1
Accumulated Other Comprehensive Income Loss - Reclassifications from AOCI (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net realized gains (losses) $ 64 $ (19) $ 12 $ (68)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest 1,231 1,174 2,222 1,898
Income tax expense 251 236 438 376
Net income 1,298 995 2,154 1,625
Net Investment Income 800 658 1,534 1,310
Interest Expense 50 50 100 100
Reclassification out of Accumulated Other Comprehensive Income        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net income (26) (25) (41) (35)
Reclassification out of Accumulated Other Comprehensive Income | Net Unrealized Gain on Securities        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net realized gains (losses) (26) (26) (38) (36)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest (26) (26) (38) (36)
Income tax expense (5) (5) (8) (8)
Net income (21) (21) (30) (28)
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest 4 3 8 7
Income tax expense 1 0 2 1
Net income 3 3 6 6
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent | Interest rate swaps        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net Investment Income 0 (2) (1) (4)
Interest Expense 2 3 4 6
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent | Currency Swap [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net Investment Income 2 2 5 5
Reclassification out of Accumulated Other Comprehensive Income | Amortization of prior service credit        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Insurance operating costs and other expenses 2 1 3 3
Reclassification out of Accumulated Other Comprehensive Income | Amortization of actuarial loss        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Insurance operating costs and other expenses (12) (10) (24) (19)
Reclassification out of Accumulated Other Comprehensive Income | Pension and Other Postretirement Plan Adjustments        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest (10) (9) (21) (16)
Income tax expense (2) (2) (4) (3)
Net income $ (8) $ (7) $ (17) $ (13)