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v3.25.1

Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Millions | 1 Months Ended |  |  |
--- | --- | --- | --- | ---
Nov. 30, 2024 | Mar. 31, 2025 | Mar. 14, 2025 | Dec. 31, 2024
Debt Instrument [Line Items] |  |  |  |  |
Obligations under finance leases due at various dates through 2054 |  |  | $ 140 |  | $ 145
Long-Term Debt and Lease Obligation, Including Current Maturities |  |  | 12,558 |  | 12,527
Unamortized debt issuance costs | [1] |  | (87) |  | (56)
Long-Term Debt and Lease Obligation, Current |  |  | (93) |  | (1,393)
Long-term debt, net of unamortized deferred financing costs |  |  | 12,378 |  | 11,078
Senior unsecured notes due 2025, interest rate of 1.250% |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Senior unsecured debt |  |  | $ 0 |  | 311
Debt Instrument, Interest Rate, Stated Percentage |  |  | 1.25% |  |
Senior unsecured notes due 2025, interest rate of 6.050% |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Senior unsecured debt |  |  | $ 0 |  | 1,000
Debt Instrument, Interest Rate, Stated Percentage |  |  | 6.05% |  |
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 4.777% |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Senior unsecured debt |  |  | $ 485 |  | 1,040
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.777% |  |
Senior unsecured notes due 2027, interest rate of 2.125% |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Senior unsecured debt |  |  | $ 540 |  | 518
Debt Instrument, Interest Rate, Stated Percentage |  |  | 2.125% |  |
Senior unsecured notes due 2027, interest rate of 6.415%(1) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Senior unsecured debt | [2] |  | $ 1,500 |  | 2,000
Debt Instrument, Interest Rate, Stated Percentage |  |  | 6.415% |  |
Debt Instrument, Interest Rate, Increase (Decrease) |  | 0.25% |  |  |
Senior unsecured term loan due 2027(2) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Senior unsecured debt | [3] |  | $ 480 |  | $ 880
Debt Instrument, Interest Rate, Stated Percentage |  |  | 6.175% |  | 6.047%
Senior unsecured notes due 2028, interest rate of 0.625% |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Senior unsecured debt |  |  | $ 541 |  | $ 519
Debt Instrument, Interest Rate, Stated Percentage |  |  | 0.625% |  |
Senior unsecured notes due 2028, interest rate of 6.600%(1) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Senior unsecured debt | [2] |  | $ 1,000 |  | 1,000
Debt Instrument, Interest Rate, Stated Percentage |  |  | 6.60% |  |
Debt Instrument, Interest Rate, Increase (Decrease) |  | 0.25% |  |  |
Senior unsecured notes due 2029, interest rate of 5.587%(1) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Senior unsecured debt | [2] |  | $ 541 |  | 519
Debt Instrument, Interest Rate, Stated Percentage |  |  | 5.587% |  |
Senior unsecured notes due 2029, interest rate of 6.580%(1) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Senior unsecured debt | [2] |  | $ 750 |  | 750
Debt Instrument, Interest Rate, Stated Percentage |  |  | 6.58% |  |
Debt Instrument, Interest Rate, Increase (Decrease) |  | 0.25% |  |  |
Senior unsecured notes due 2030, interest rate of 6.500% |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Senior unsecured debt |  |  | $ 700 |  | 0
Debt Instrument, Interest Rate, Stated Percentage |  |  | 6.50% | 6.50% |
Senior unsecured notes due 2030, interest rate of 6.800%(1) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Senior unsecured debt | [2] |  | $ 999 |  | 999
Debt Instrument, Interest Rate, Stated Percentage |  |  | 6.80% |  |
Debt Instrument, Interest Rate, Increase (Decrease) |  | 0.25% |  |  |
5.000% Senior Notes due 2031 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Senior unsecured debt |  |  | $ 811 |  | 0
Debt Instrument, Interest Rate, Stated Percentage |  |  | 5.00% | 5.00% |
Senior unsecured notes due 2032, interest rate of 6.629%(1) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Senior unsecured debt | [2] |  | $ 1,000 |  | 1,000
Debt Instrument, Interest Rate, Stated Percentage |  |  | 6.629% |  |
Debt Instrument, Interest Rate, Increase (Decrease) |  | 0.25% |  |  |
Senior unsecured notes due 2033, interest rate of 6.950%(1) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Senior unsecured debt | [2] |  | $ 1,000 |  | 1,000
Debt Instrument, Interest Rate, Stated Percentage |  |  | 6.95% |  |
Debt Instrument, Interest Rate, Increase (Decrease) |  | 0.25% |  |  |
Senior unsecured notes due 2033, interest rate of 6.750% |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Senior unsecured debt |  |  | $ 1,100 |  | 0
Debt Instrument, Interest Rate, Stated Percentage |  |  | 6.75% | 6.75% |
Pollution control and industrial revenue bonds due at various dates through 2030(3) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Other long-term debt | [4] |  | $ 125 |  | 126
Pollution control and industrial revenue bonds due at various dates through 2030(3) | Minimum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.10% |  |
Pollution control and industrial revenue bonds due at various dates through 2030(3) | Maximum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 5.00% |  |
Bank loans due at various dates through 2030(4) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Other long-term debt | [5] |  | $ 446 |  | $ 320
Long-term debt, weighted average interest rate, at point in time |  |  | 2.70% |  | 2.80%
[1] | Related to the Company's long-term debt, excluding obligations under finance leases.
[2] | In November 2024, S&P Global Ratings downgraded the Company's credit rating to BB+, which had the effect of increasing the interest rates by 25 basis points on certain senior unsecured notes, effective beginning at various dates through January 19, 2025.
[3] | The interest rate was 6.175% and 6.047% as of March 31, 2025 and December 31, 2024, respectively.
[4] | Interest rates range from 4.1% to 5.0%.
[5] | The weighted average interest rate was 2.7% and 2.8% as of March 31, 2025 and December 31, 2024, respectively.

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