v3.26.1
Debt - Schedule of Long-term Debt (Details) - USD ($)
$ in Millions
1 Months Ended
Nov. 30, 2025
Feb. 28, 2025
Jun. 30, 2026
Jun. 25, 2026
Dec. 31, 2025
Debt Instrument [Line Items]          
Obligations under finance leases due at various dates through 2054     $ 121   $ 129
Long-term debt and lease obligation, including current maturities     12,013   12,614
Unamortized debt issuance costs [1]     (96)   (106)
Current installments of long-term debt     (1,221)   (1,114)
Long-term debt, net of unamortized deferred financing costs     10,696   11,394
Senior unsecured notes due 2026, interest rate of 1.400%          
Debt Instrument [Line Items]          
Senior unsecured debt     $ 400   400
Debt Instrument, Interest Rate, Stated Percentage     1.40%    
Senior unsecured notes due 2026, interest rate of 5.277%(1)          
Debt Instrument [Line Items]          
Senior unsecured debt [2]     $ 0   526
Debt Instrument, Interest Rate, Stated Percentage     5.277% 4.777%  
Senior unsecured notes due 2027, interest rate of 2.125%          
Debt Instrument [Line Items]          
Senior unsecured debt     $ 569   587
Debt Instrument, Interest Rate, Stated Percentage     2.125%    
Senior unsecured notes due 2027, interest rate of 7.165%(1)          
Debt Instrument [Line Items]          
Senior unsecured debt [2]     $ 554   554
Debt Instrument, Interest Rate, Stated Percentage     7.165%    
Senior unsecured notes due 2028, interest rate of 0.625%          
Debt Instrument [Line Items]          
Senior unsecured debt     $ 570   587
Debt Instrument, Interest Rate, Stated Percentage     0.625%    
Senior unsecured notes due 2028, interest rate of 7.350%(1)          
Debt Instrument [Line Items]          
Senior unsecured debt [2]     $ 746   746
Debt Instrument, Interest Rate, Stated Percentage     7.35%    
Senior unsecured notes due 2029, interest rate of 6.337%(1)          
Debt Instrument [Line Items]          
Senior unsecured debt [2]     $ 570   588
Debt Instrument, Interest Rate, Stated Percentage     6.337%    
Senior unsecured notes due 2029, interest rate of 7.330%(1)          
Debt Instrument [Line Items]          
Senior unsecured debt [2]     $ 750   750
Debt Instrument, Interest Rate, Stated Percentage     7.33%    
Senior unsecured notes due 2030, interest rate of 6.500%          
Debt Instrument [Line Items]          
Senior unsecured debt     $ 700   700
Debt Instrument, Interest Rate, Stated Percentage     6.50%    
Senior unsecured notes due 2030, interest rate of 7.550%(1)          
Debt Instrument [Line Items]          
Senior unsecured debt [2]     $ 999   999
Debt Instrument, Interest Rate, Stated Percentage     7.55%    
Senior unsecured notes due 2031, interest rate of 7.000%          
Debt Instrument [Line Items]          
Senior unsecured debt     $ 600   600
Debt Instrument, Interest Rate, Stated Percentage     7.00%    
Senior unsecured notes due 2031, interest rate of 5.000%          
Debt Instrument [Line Items]          
Senior unsecured debt     $ 855   881
Debt Instrument, Interest Rate, Stated Percentage     5.00%    
Senior unsecured notes due 2032, interest rate of 7.379%(1)          
Debt Instrument [Line Items]          
Senior unsecured debt [2]     $ 1,000   1,000
Debt Instrument, Interest Rate, Stated Percentage     7.379%    
Senior unsecured notes due 2033, interest rate of 7.700%(1)          
Debt Instrument [Line Items]          
Senior unsecured debt [2]     $ 1,000   1,000
Debt Instrument, Interest Rate, Stated Percentage     7.70%    
Senior unsecured notes due 2033, interest rate of 6.750%          
Debt Instrument [Line Items]          
Senior unsecured debt     $ 1,100   1,100
Debt Instrument, Interest Rate, Stated Percentage     6.75%    
Senior unsecured notes due 2034, interest rate of 7.375%          
Debt Instrument [Line Items]          
Senior unsecured debt     $ 800   800
Debt Instrument, Interest Rate, Stated Percentage     7.375%    
Pollution control and industrial revenue bonds due at various dates through 2030(2)          
Debt Instrument [Line Items]          
Other long-term debt [3]     $ 85   85
Pollution control and industrial revenue bonds due at various dates through 2030(2) | Maximum          
Debt Instrument [Line Items]          
Debt Instrument, Interest Rate, Stated Percentage     4.30%    
Pollution control and industrial revenue bonds due at various dates through 2030(2) | Minimum          
Debt Instrument [Line Items]          
Debt Instrument, Interest Rate, Stated Percentage     4.10%    
Bank loans due at various dates through 2031(3)          
Debt Instrument [Line Items]          
Other long-term debt [4]     $ 594   $ 582
Long-term debt, weighted average interest rate, at point in time     2.40%   2.40%
Various senior notes | Maximum          
Debt Instrument [Line Items]          
Debt instrument, interest rate, increase (decrease) 0.50% 0.25%      
[1] Related to the Company's long-term debt, excluding obligations under finance leases.
[2] In February 2025, Moody's Ratings downgraded the Company's credit rating, which had the effect of increasing interest rates by 25 basis points on certain senior unsecured notes, effective on various dates beginning May 15, 2025 through January 19, 2026.
In November 2025, S&P Global Ratings and Moody's Ratings downgraded the Company's credit rating, which together had the effect of increasing interest rates for certain senior unsecured notes by an additional 50 basis points, effective on various dates beginning January 15, 2026 through May 15, 2026.
[3] Interest rates range from 4.1% to 4.3%.
[4] The weighted average interest rate was 2.4% and 2.4% as of June 30, 2026 and December 31, 2025, respectively.