v3.25.4
Retirement Benefits (Summary of the U.S. and Non-U.S. Plan Investments Measured At Fair Value on a Recurring Basis) (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 13,072 $ 12,575  
Quoted Prices in Active Markets for Identical Assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,095 874  
Significant Other Observable Inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4,507 6,833  
Significant Unobservable Inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,861 290 $ 303
NAV      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4,609 4,578  
Total investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 13,265 13,148  
Total investments | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,095 874  
Total investments | Significant Other Observable Inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4,585 7,282  
Total investments | Significant Unobservable Inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,976 414  
Total investments | NAV      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4,609 4,578  
Common/collective trusts      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,330 3,228  
Common/collective trusts | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 2  
Common/collective trusts | Significant Other Observable Inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Common/collective trusts | Significant Unobservable Inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Common/collective trusts | NAV      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,330 3,226  
Corporate obligations      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,458 2,675  
Corporate obligations | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Corporate obligations | Significant Other Observable Inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,458 2,675  
Corporate obligations | Significant Unobservable Inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Corporate stocks      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 140 375  
Corporate stocks | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 86 339  
Corporate stocks | Significant Other Observable Inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 53 35  
Corporate stocks | Significant Unobservable Inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 1 1
Private equity/partnerships      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,222 1,295  
Private equity/partnerships | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Private equity/partnerships | Significant Other Observable Inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Private equity/partnerships | Significant Unobservable Inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Private equity/partnerships | NAV      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,222 1,295  
Government securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,034 4,579  
Government securities | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 16 20  
Government securities | Significant Other Observable Inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,018 4,559  
Government securities | Significant Unobservable Inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Real estate      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 57 57  
Real estate | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Real estate | Significant Other Observable Inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Real estate | Significant Unobservable Inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Real estate | NAV      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 57 57  
Short-term investment funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 774 292  
Short-term investment funds | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 774 292  
Short-term investment funds | Significant Other Observable Inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Short-term investment funds | Significant Unobservable Inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Company common stock      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 186 212  
Company common stock | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 186 212  
Company common stock | Significant Other Observable Inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Company common stock | Significant Unobservable Inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Insurance group annuity contracts      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,722 164  
Insurance group annuity contracts | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Insurance group annuity contracts | Significant Other Observable Inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Insurance group annuity contracts | Significant Unobservable Inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,722 164 185
Other investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 342 271  
Other investments | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 33 9  
Other investments | Significant Other Observable Inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 56 13  
Other investments | Significant Unobservable Inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 253 249 251
Net derivative liabilities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets (193) (573)  
Net derivative liabilities | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Net derivative liabilities | Significant Other Observable Inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets (78) (449)  
Net derivative liabilities | Significant Unobservable Inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ (115) $ (124) $ (134)