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Long-term Debt - Additional Information (Detail) - USD ($)
Mar. 31, 2026
Dec. 31, 2025
Debt Instrument [Line Items]    
Long-term debt, fair value $ 9,300,000,000 $ 9,400,000,000
Committed credit facility agreement aggregated 5,000,000,000  
Borrowings outstanding under credit facility 0 0
Short-term borrowings and current portion of long-term debt 1,938,000,000 1,894,000,000
Commercial paper programs mature in February 2029    
Debt Instrument [Line Items]    
Committed credit facility agreement aggregated 2,000,000,000  
Commercial Paper Programs Maturing December 2030    
Debt Instrument [Line Items]    
Committed credit facility agreement aggregated 3,000,000,000  
Commercial paper borrowings    
Debt Instrument [Line Items]    
Long-term debt   $ 0
Short-term borrowings and current portion of long-term debt $ 800,000,000