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Borrowings and Lines of Credit (Narrative) (Details) - USD ($)
$ in Billions
9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Debt Instrument [Line Items]      
Commercial paper borrowings outstanding $ 0.0   $ 0.0
Average maturity of long-term debt 12 years    
Commercial Paper      
Debt Instrument [Line Items]      
New borrowings of short-term debt with maturities greater than 90 days $ 0.0 $ 0.0  
Repayments of short-term debt maturing in greater than 90 days 0.0 $ 0.0  
Revolving Credit Facility      
Debt Instrument [Line Items]      
Maximum borrowing capacity 5.0    
Borrowings outstanding 0.0    
Commercial Paper      
Debt Instrument [Line Items]      
Maximum borrowing capacity $ 5.0