v3.26.1
Fair Value Disclosures - Assets And Liabilities Measured On A Recurring Basis (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities $ 3,956 $ 3,549
Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 3,956 3,549
Equity securities 563 522
Total assets 4,721 4,283
Total liabilities 105 41
Recurring basis | Foreign currency contracts - net    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Derivate financial instruments - assets/liabilities 163 204
Recurring basis | Total return swap contracts - net    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Derivate financial instruments - assets/liabilities 39 (1)
Recurring basis | Interest rate contracts - net    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Derivate financial instruments - assets/liabilities (103) (40)
Recurring basis | Commodity contracts - net    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Derivate financial instruments - assets/liabilities (2) 8
U.S. treasury bonds    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 10 10
U.S. treasury bonds | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 10 10
Other U.S. and non-U.S. government bonds    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 67 74
Other U.S. and non-U.S. government bonds | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 67 74
Corporate bonds and other debt securities    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 2,861 2,480
Corporate bonds and other debt securities | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 2,861 2,480
Asset-backed securities    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 291 273
Asset-backed securities | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 291 273
U.S. governmental agency | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 569 572
Residential    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 4 1
Residential | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 4 1
Commercial    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 154 139
Commercial | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 154 139
Large capitalization value | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Equity securities 317 283
Smaller company growth | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Equity securities 71 65
REIT | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Equity securities 175 174
Level 1 | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 10 10
Equity securities 388 348
Total assets 398 358
Total liabilities 0 0
Level 1 | Recurring basis | Foreign currency contracts - net    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Derivate financial instruments - assets/liabilities 0 0
Level 1 | Recurring basis | Total return swap contracts - net    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Derivate financial instruments - assets/liabilities 0 0
Level 1 | Recurring basis | Interest rate contracts - net    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Derivate financial instruments - assets/liabilities 0 0
Level 1 | Recurring basis | Commodity contracts - net    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Derivate financial instruments - assets/liabilities 0 0
Level 1 | U.S. treasury bonds | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 10 10
Level 1 | Other U.S. and non-U.S. government bonds | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Level 1 | Corporate bonds and other debt securities | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Level 1 | Asset-backed securities | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Level 1 | U.S. governmental agency | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Level 1 | Residential | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Level 1 | Commercial | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Level 1 | Large capitalization value | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Equity securities 317 283
Level 1 | Smaller company growth | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Equity securities 71 65
Level 1 | REIT | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Equity securities 0 0
Level 2 | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 3,946 3,539
Equity securities 0 0
Total assets 4,148 3,751
Total liabilities 105 41
Level 2 | Recurring basis | Foreign currency contracts - net    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Derivate financial instruments - assets/liabilities 163 204
Level 2 | Recurring basis | Total return swap contracts - net    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Derivate financial instruments - assets/liabilities 39 (1)
Level 2 | Recurring basis | Interest rate contracts - net    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Derivate financial instruments - assets/liabilities (103) (40)
Level 2 | Recurring basis | Commodity contracts - net    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Derivate financial instruments - assets/liabilities (2) 8
Level 2 | U.S. treasury bonds | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Level 2 | Other U.S. and non-U.S. government bonds | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 67 74
Level 2 | Corporate bonds and other debt securities | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 2,861 2,480
Level 2 | Asset-backed securities | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 291 273
Level 2 | U.S. governmental agency | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 569 572
Level 2 | Residential | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 4 1
Level 2 | Commercial | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 154 139
Level 2 | Large capitalization value | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Equity securities 0 0
Level 2 | Smaller company growth | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Equity securities 0 0
Level 2 | REIT | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Equity securities 0 0
Level 3 | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Equity securities 0 0
Total assets 0 0
Total liabilities 0 0
Level 3 | Recurring basis | Foreign currency contracts - net    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Derivate financial instruments - assets/liabilities 0 0
Level 3 | Recurring basis | Total return swap contracts - net    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Derivate financial instruments - assets/liabilities 0 0
Level 3 | Recurring basis | Interest rate contracts - net    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Derivate financial instruments - assets/liabilities 0 0
Level 3 | Recurring basis | Commodity contracts - net    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Derivate financial instruments - assets/liabilities 0 0
Level 3 | Nonrecurring basis | Financial Products    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Loans carried at fair value 68 63
Level 3 | U.S. treasury bonds | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Level 3 | Other U.S. and non-U.S. government bonds | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Level 3 | Corporate bonds and other debt securities | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Level 3 | Asset-backed securities | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Level 3 | U.S. governmental agency | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Level 3 | Residential | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Level 3 | Commercial | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Level 3 | Large capitalization value | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Equity securities 0 0
Level 3 | Smaller company growth | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Equity securities 0 0
Level 3 | REIT | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Equity securities 0 0
Measured at NAV | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Equity securities 175 174
Total assets 175 174
Total liabilities 0 0
Measured at NAV | Recurring basis | Foreign currency contracts - net    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Derivate financial instruments - assets/liabilities 0 0
Measured at NAV | Recurring basis | Total return swap contracts - net    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Derivate financial instruments - assets/liabilities 0 0
Measured at NAV | Recurring basis | Interest rate contracts - net    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Derivate financial instruments - assets/liabilities 0 0
Measured at NAV | Recurring basis | Commodity contracts - net    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Derivate financial instruments - assets/liabilities 0 0
Measured at NAV | U.S. treasury bonds | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Measured at NAV | Other U.S. and non-U.S. government bonds | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Measured at NAV | Corporate bonds and other debt securities | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Measured at NAV | Asset-backed securities | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Measured at NAV | U.S. governmental agency | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Measured at NAV | Residential | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Measured at NAV | Commercial | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Debt securities 0 0
Measured at NAV | Large capitalization value | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Equity securities 0 0
Measured at NAV | Smaller company growth | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Equity securities 0 0
Measured at NAV | REIT | Recurring basis    
Assets and liabilities measured on a recurring and non-recurring basis at fair value    
Equity securities $ 175 $ 174