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Property, Plant And Equipment (Narrative) (Details) - USD ($)
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Property, Plant and Equipment [Line Items]      
Property, plant and equipment $ 22,091,000,000   $ 19,318,000,000
Capital expenditures 2,421,000,000 $ 1,991,000,000  
Vendor financing payments 16,000,000    
Accounts payable and accrued liabilities associated with capital 809,000,000    
Other current liabilities associated with capital expenditures 13,000,000    
Other liabilities associated with capital expenditures 55,000,000    
Vendor financing payables associated with capital expenditures 0    
Capitalized interest 49,000,000    
Materials And Supplies [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment $ 324,000,000   $ 431,000,000