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Other Liabilities (Tables)
 12 Months Ended
Dec. 31, 2025
Other Liabilities Disclosure [Abstract]  
Other liabilities
($ in millions)
At December 31:20252024
Income tax reserves $5,671 $6,865 
Deferred taxes781 815 
Excess Savings Plan1,545 1,445 
Disability benefits278 274 
Derivative liabilities259 463 
Workforce reductions424 445 
Environmental accruals207 204 
Other645 536 
Total$9,810 $11,048