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LONG-TERM DEBT - SCHEDULE (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 17,955 | $ 17,958
Unamortized premium, net |  | 1,152 | 1,261
Debt issuance costs |  | (106) | (73)
Net book value of debt |  | 19,001 | 19,146
Long-term finance leases |  | 591 | 546
Current finance leases |  | 146 | 143
Total debt and finance leases |  | 19,738 | 19,835
Less current maturities of finance leases |  | (146) | (143)
Less current maturities of long-term debt |  | (1,056) | (22)
Long-term debt, net | [1] | 18,536 | 19,670
Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Net book value of debt |  |  | 9,800
8.750% medium-term notes due 2023 | Medium-term notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 0 | 22
Debt instrument interest rate stated percentage |  | 8.75% |
2.900% senior notes due 2024 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 654 | $ 654
Debt instrument interest rate stated percentage |  | 2.90% | 2.90%
6.950% senior notes due 2024 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 291 | $ 291
Debt instrument interest rate stated percentage |  | 6.95% | 6.95%
3.450% senior notes due 2024 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 111 | $ 111
Debt instrument interest rate stated percentage |  | 3.45% | 3.45%
5.875% senior notes due 2025 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 606 | $ 606
Debt instrument interest rate stated percentage |  | 5.875% | 5.875%
3.500% senior notes due 2025 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 137 | $ 137
Debt instrument interest rate stated percentage |  | 3.50% | 3.50%
5.500% senior notes due 2025 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 465 | $ 465
Debt instrument interest rate stated percentage |  | 5.50% | 5.50%
5.550% senior notes due 2026 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 870 | $ 870
Debt instrument interest rate stated percentage |  | 5.55% | 5.55%
3.200% senior notes due 2026 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 182 | $ 182
Debt instrument interest rate stated percentage |  | 3.20% | 3.20%
3.400% senior notes due 2026 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 284 | $ 284
Debt instrument interest rate stated percentage |  | 3.40% | 3.40%
7.500% debentures due 2026 | Debentures |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 112 | $ 112
Debt instrument interest rate stated percentage |  | 7.50% |
8.500% senior notes due 2027 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 489 | $ 489
Debt instrument interest rate stated percentage |  | 8.50% | 8.50%
3.000% senior notes due 2027 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 216 | $ 216
Debt instrument interest rate stated percentage |  | 3.00% | 3.00%
7.125% debentures due 2027 | Debentures |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 150 | $ 150
Debt instrument interest rate stated percentage |  | 7.125% |
7.000% debentures due 2027 | Debentures |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 48 | 48
Debt instrument interest rate stated percentage |  | 7.00% |
6.625% debentures due 2028 | Debentures |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 14 | 14
Debt instrument interest rate stated percentage |  | 6.625% |
7.150% debentures due 2028 | Debentures |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 232 | $ 232
Debt instrument interest rate stated percentage |  | 7.15% | 7.15%
7.200% senior debentures due 2028 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 82 | $ 82
Debt instrument interest rate stated percentage |  | 7.20% |
6.375% senior notes due 2028 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 578 | $ 578
Debt instrument interest rate stated percentage |  | 6.375% | 6.375%
7.200% debentures due 2029 | Debentures |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 135 | $ 135
Debt instrument interest rate stated percentage |  | 7.20% |
7.950% debentures due 2029 | Debentures |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 116 | 116
Debt instrument interest rate stated percentage |  | 7.95% |
8.450% senior debentures due 2029 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 116 | 116
Debt instrument interest rate stated percentage |  | 8.45% |
3.500% senior notes due 2029 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 286 | $ 286
Debt instrument interest rate stated percentage |  | 3.50% | 3.50%
Variable rate bonds due 2030 | Variable rate bonds |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 68 | $ 68
Debt instrument, variable rate |  | 5.75% | 5.32%
8.875% senior notes due 2030 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 1,000 | $ 1,000
Debt instrument interest rate stated percentage |  | 8.875% |
6.625% senior notes due 2030 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
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 |  |  |
Debt Instrument [Line Items] |  |  |
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 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 900 | $ 900
Debt instrument interest rate stated percentage |  | 7.50% |
7.875% senior notes due 2031 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 500 | 500
Debt instrument interest rate stated percentage |  | 7.875% |
6.450% senior notes due 2036 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
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 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 673 | $ 673
0.000% loan due 2039 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 19 | 0
Debt instrument interest rate stated percentage |  | 0.00% |
4.300% senior notes due 2039 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 247 | $ 247
Debt instrument interest rate stated percentage |  | 4.30% | 4.30%
7.950%senior notes due 2039 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 325 | $ 325
Debt instrument interest rate stated percentage |  | 7.95% |
6.200% senior notes due 2040 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 737 | $ 737
Debt instrument interest rate stated percentage |  | 6.20% | 6.20%
4.500% senior notes due 2044 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 191 | $ 191
Debt instrument interest rate stated percentage |  | 4.50% | 4.50%
4.625% senior notes due 2045 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 296 | $ 296
Debt instrument interest rate stated percentage |  | 4.625% | 4.625%
6.600% senior notes due 2046 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 1,117 | $ 1,117
Debt instrument interest rate stated percentage |  | 6.60% |
4.400% senior notes due 2046 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 424 | $ 424
Debt instrument interest rate stated percentage |  | 4.40% | 4.40%
4.100% senior notes due 2047 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 258 | $ 258
Debt instrument interest rate stated percentage |  | 4.10% | 4.10%
4.200% senior notes due 2048 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 304 | $ 304
Debt instrument interest rate stated percentage |  | 4.20% | 4.20%
4.400% senior notes due 2049 | Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 280 | $ 280
Debt instrument interest rate stated percentage |  | 4.40% | 4.40%
7.730% debentures due 2096 | Debentures |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 58 | $ 58
Debt instrument interest rate stated percentage |  | 7.73% |
7.500% debentures due 2096 | Debentures |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 60 | 60
Debt instrument interest rate stated percentage |  | 7.50% |
7.250% debentures due 2096 | Debentures |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross |  | $ 5 | $ 5
Debt instrument interest rate stated percentage |  | 7.25% |
[1] | Included $591 million and $546 million of finance lease liabilities as of December 31, 2023 and 2022, respectively.

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