v3.25.4
Retirement Benefits - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit obligation, period increase (decrease) $ 898 $ (930)
Percentage of global investments in plan assets 85.00%  
Defined Benefit Pension Plans    
Defined Benefit Plan Disclosure [Line Items]    
Total accumulated benefit obligation for our defined benefit pension plans $ 13,000 $ 12,200
Marketable equity securities    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets, target allocation 85.00%  
Developed markets    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets, target allocation 15.00%  
Private equity-like investments | Defined Benefit Pension Plans | Minimum    
Defined Benefit Plan Disclosure [Line Items]    
Fund lives 10 years  
Private equity-like investments | Defined Benefit Pension Plans | Maximum    
Defined Benefit Plan Disclosure [Line Items]    
Fund lives 15 years