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Debt - Debt With Interest Rates And Maturities (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Debt Instrument [Line Items]    
Finance lease, liability, statement of financial position [Extensible Enumeration] Long-term debt Long-term debt
Finance leases $ 13 $ 17
Discounts, premiums, and debt issuance costs (902) (933)
Total debt 17,206 17,179
Less current maturities and short-term debt (555) (4)
Long-term debt $ 16,651 17,175
4.08% maturing to 2029    
Debt Instrument [Line Items]    
Long-term debt, weighted average interest rate 4.08%  
Notes and debentures $ 2,981 2,981
4.33% maturing 2030 to 2034    
Debt Instrument [Line Items]    
Long-term debt, weighted average interest rate 4.33%  
Notes and debentures $ 2,883 2,883
4.28% maturing 2037 to 2064    
Debt Instrument [Line Items]    
Long-term debt, weighted average interest rate 4.28%  
Notes and debentures $ 10,847 10,847
5.22% maturing 2097 to 2121    
Debt Instrument [Line Items]    
Long-term debt, weighted average interest rate 5.22%  
Notes and debentures $ 1,384 $ 1,384