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LONG-TERM DEBT - Schedule of Long-term Debt (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2025 | Dec. 31, 2024
Long-term Debt |  |
Long-term debt, gross | $ 22,119 | $ 24,391
Unamortized premium, net | 972 | 1,037
Debt issuance costs | (95) | (105)
Net book value of debt | 22,996 | 25,323
Long-term finance leases | 631 | 658
Current finance leases | 148 | 135
Total debt and finance leases | 23,775 | 26,116
Less: current finance leases | (148) | (135)
Less: current maturities of long-term debt | (285) | (1,003)
Long-term debt, net | 23,342 | 24,978
5.500% senior notes due 2025 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 0 | $ 465
Debt instrument interest rate stated percentage | 5.50% | 5.50%
5.875% senior notes due 2025 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 0 | $ 536
Debt instrument interest rate stated percentage | 5.875% | 5.875%
5.550% senior notes due 2026 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 0 | $ 870
Debt instrument interest rate stated percentage | 5.55% | 5.55%
3.400% senior notes due 2026 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 284 | $ 284
Debt instrument interest rate stated percentage | 3.40% | 3.40%
Two-year term loan due 2026 (6.036% and 6.249% as of June 30, 2025 and December 31, 2024, respectively) | Secured Debt |  |
Long-term Debt |  |
Long-term debt, gross | $ 2,300 | $ 2,700
Debt instrument interest rate stated percentage | 6.036% | 6.249%
Debt term | 2 years |
3.200% senior notes due 2026 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 182 | $ 182
Debt instrument interest rate stated percentage | 3.20% | 3.20%
7.500% debentures due 2026 | Debentures |  |
Long-term Debt |  |
Long-term debt, gross | $ 112 | $ 112
Debt instrument interest rate stated percentage | 7.50% | 7.50%
8.500% senior notes due 2027 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 489 | $ 489
Debt instrument interest rate stated percentage | 8.50% | 8.50%
3.000% senior notes due 2027 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 216 | $ 216
Debt instrument interest rate stated percentage | 3.00% | 3.00%
7.125% debentures due 2027 | Debentures |  |
Long-term Debt |  |
Long-term debt, gross | $ 150 | $ 150
Debt instrument interest rate stated percentage | 7.125% | 7.125%
7.000% debentures due 2027 | Debentures |  |
Long-term Debt |  |
Long-term debt, gross | $ 48 | $ 48
Debt instrument interest rate stated percentage | 7.00% | 7.00%
5.000% senior notes due 2027 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 600 | $ 600
Debt instrument interest rate stated percentage | 5.00% | 5.00%
6.625% debentures due 2028 | Debentures |  |
Long-term Debt |  |
Long-term debt, gross | $ 14 | $ 14
Debt instrument interest rate stated percentage | 6.625% | 6.625%
7.150% debentures due 2028 | Debentures |  |
Long-term Debt |  |
Long-term debt, gross | $ 232 | $ 232
Debt instrument interest rate stated percentage | 7.15% | 7.15%
7.200% senior debentures due 2028 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 82 | $ 82
Debt instrument interest rate stated percentage | 7.20% | 7.20%
6.375% senior notes due 2028 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 578 | $ 578
Debt instrument interest rate stated percentage | 6.375% | 6.375%
7.200% debentures due 2029 | Debentures |  |
Long-term Debt |  |
Long-term debt, gross | $ 135 | $ 135
Debt instrument interest rate stated percentage | 7.20% | 7.20%
7.950% debentures due 2029 | Debentures |  |
Long-term Debt |  |
Long-term debt, gross | $ 116 | $ 116
Debt instrument interest rate stated percentage | 7.95% | 7.95%
8.450% senior notes due 2029 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 116 | $ 116
Debt instrument interest rate stated percentage | 8.45% | 8.45%
3.500% senior notes due 2029 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 286 | $ 286
Debt instrument interest rate stated percentage | 3.50% | 3.50%
5.200% senior notes due 2029 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 1,200 | $ 1,200
Debt instrument interest rate stated percentage | 5.20% | 5.20%
Variable rate bonds due 2030 (3.950% and 5.710% as of June 30, 2025 and December 31, 2024, respectively) | Variable Rate Bonds |  |
Long-term Debt |  |
Long-term debt, gross | $ 68 | $ 68
Debt instrument, variable rate | 3.95% | 5.71%
8.875% senior notes due 2030 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 1,000 | $ 1,000
Debt instrument interest rate stated percentage | 8.875% | 8.875%
6.625% senior notes due 2030 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 1,449 | $ 1,449
Debt instrument interest rate stated percentage | 6.625% | 6.625%
6.125% senior notes due 2031 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 1,143 | $ 1,143
Debt instrument interest rate stated percentage | 6.125% | 6.125%
7.500% senior notes due 2031 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 900 | $ 900
Debt instrument interest rate stated percentage | 7.50% | 7.50%
7.875% senior notes due 2031 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 500 | $ 500
Debt instrument interest rate stated percentage | 7.875% | 7.875%
5.375% senior notes due 2032 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 1,000 | $ 1,000
Debt instrument interest rate stated percentage | 5.375% | 5.375%
5.550% senior notes due 2034 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 1,200 | $ 1,200
Debt instrument interest rate stated percentage | 5.55% | 5.55%
6.450% senior notes due 2036 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 1,727 | $ 1,727
Debt instrument interest rate stated percentage | 6.45% | 6.45%
Zero Coupon senior notes due 2036 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 673 | $ 673
0.000% loan due 2039 (CAD denominated) |  |
Long-term Debt |  |
Long-term debt, gross | $ 17 | $ 18
Debt instrument interest rate stated percentage | 0.00% | 0.00%
4.300% senior notes due 2039 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 247 | $ 247
Debt instrument interest rate stated percentage | 4.30% | 4.30%
7.950% senior notes due 2039 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 325 | $ 325
Debt instrument interest rate stated percentage | 7.95% | 7.95%
6.200% senior notes due 2040 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 737 | $ 737
Debt instrument interest rate stated percentage | 6.20% | 6.20%
4.500% senior notes due 2044 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 191 | $ 191
Debt instrument interest rate stated percentage | 4.50% | 4.50%
4.625% senior notes due 2045 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 296 | $ 296
Debt instrument interest rate stated percentage | 4.625% | 4.625%
6.600% senior notes due 2046 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 1,117 | $ 1,117
Debt instrument interest rate stated percentage | 6.60% | 6.60%
4.400% senior notes due 2046 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 424 | $ 424
Debt instrument interest rate stated percentage | 4.40% | 4.40%
4.100% senior notes due 2047 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 258 | $ 258
Debt instrument interest rate stated percentage | 4.10% | 4.10%
4.200% senior notes due 2048 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 304 | $ 304
Debt instrument interest rate stated percentage | 4.20% | 4.20%
4.400% senior notes due 2049 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 280 | $ 280
Debt instrument interest rate stated percentage | 4.40% | 4.40%
6.050% senior notes due 2054 | Senior Notes |  |
Long-term Debt |  |
Long-term debt, gross | $ 1,000 | $ 1,000
Debt instrument interest rate stated percentage | 6.05% | 6.05%
7.730% debentures due 2096 | Debentures |  |
Long-term Debt |  |
Long-term debt, gross | $ 58 | $ 58
Debt instrument interest rate stated percentage | 7.73% | 7.73%
7.500% debentures due 2096 | Debentures |  |
Long-term Debt |  |
Long-term debt, gross | $ 60 | $ 60
Debt instrument interest rate stated percentage | 7.50% | 7.50%
7.250% debentures due 2096 | Debentures |  |
Long-term Debt |  |
Long-term debt, gross | $ 5 | $ 5
Debt instrument interest rate stated percentage | 7.25% | 7.25%

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