v3.25.2
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%