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DEBT - Schedule of Debt (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Jan. 31, 2026
Dec. 31, 2025
Debt Instrument [Line Items]      
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] Total long-term debt, net of current portion, Less current portion   Total long-term debt, net of current portion, Less current portion
Borrowings under credit facility $ 1,800   $ 0
Obligations under finance leases 2   3
Total debt 15,156   13,658
Less current portion 665   433
Total long-term debt, net of current portion 14,491   13,225
Net unamortized discount on senior and junior subordinated debt 1,280   1,320
Face value of debt $ 16,430   14,980
4.0% Senior Notes due 2026      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 4.00% 4.00%  
Carrying value of senior debt $ 0   347
3.70% Senior Notes due 2026      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 3.70%    
Carrying value of senior debt $ 86   85
2.90% Senior Notes due 2027      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 2.90%    
Carrying value of senior debt $ 578   573
3.375% Senior Notes due 2028      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 3.375%    
Carrying value of senior debt $ 490   487
3.70% Senior Notes due 2028      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 3.70%    
Carrying value of senior debt $ 492   489
4.20% Senior Notes due 2029      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 4.20%    
Carrying value of senior debt $ 491   489
7.875% Senior Debentures due 2030      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 7.875%    
Carrying value of senior debt $ 905   915
4.95% Senior Notes due 2031      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 4.95%    
Carrying value of senior debt $ 1,224   1,221
4.20% Senior Notes due 2032      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 4.20%    
Carrying value of senior debt $ 927   921
5.50% Senior Debentures due 2033      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 5.50%    
Carrying value of senior debt $ 418   417
4.85% Senior Debentures due 2034      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 4.85%    
Carrying value of senior debt $ 76   76
6.875% Senior Debentures due 2036      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 6.875%    
Carrying value of senior debt $ 1,117   1,119
6.75% Senior Debentures due 2037      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 6.75%    
Carrying value of senior debt $ 75   75
5.90% Senior Notes due 2040      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 5.90%    
Carrying value of senior debt $ 273   272
4.50% Senior Debentures due 2042      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 4.50%    
Carrying value of senior debt $ 34   34
4.85% Senior Notes due 2042      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 4.85%    
Carrying value of senior debt $ 404   400
4.375% Senior Debentures due 2043      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 4.375%    
Carrying value of senior debt $ 1,090   1,079
4.875% Senior Debentures due 2043      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 4.875%    
Carrying value of senior debt $ 14   14
5.85% Senior Debentures due 2043      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 5.85%    
Carrying value of senior debt $ 1,107   1,103
5.25% Senior Debentures due 2044      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 5.25%    
Carrying value of senior debt $ 277   275
4.90% Senior Notes due 2044      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 4.90%    
Carrying value of senior debt $ 435   432
4.60% Senior Notes due 2045      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 4.60%    
Carrying value of senior debt $ 456   452
4.95% Senior Notes due 2050      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 4.95%    
Carrying value of senior debt $ 768   763
6.25% Junior Subordinated Debentures due 2057      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 6.25%    
Junior subordinated debentures $ 628   628
6.375% Junior Subordinated Debentures due 2062      
Debt Instrument [Line Items]      
Stated interest rate (in percent) 6.375%    
Junior subordinated debentures $ 989   $ 989