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LONG-TERM DEBT - Schedule of Long-Term Debt (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Aug. 31, 2025 | Feb. 28, 2025 | Dec. 31, 2024
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Commercial paper | $ 618 |  |  | $ 1,582
Credit Facility | 0 |  |  | 0
Finance lease obligations | 117 |  |  | 124
Other | 23 |  |  | 55
Total debt | 15,999 |  |  | 14,447
Less current portion | (1,557) |  |  | (1,309)
Long-term debt, noncurrent | $ 14,442 |  |  | 13,138
Series P Notes, matured October 1, 2025 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 3.80% |  |  |
Effective interest rate | 4.00% |  |  |
Senior notes, face amount | $ 350 |  |  |
Senior notes | $ 350 |  |  | 349
Series R Notes, maturing June 15, 2026 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 3.10% |  |  |
Effective interest rate | 3.30% |  |  |
Senior notes, face amount | $ 750 |  |  |
Senior notes | $ 749 |  |  | 749
Series V Notes, matured March 15, 2025 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 3.80% |  |  |
Effective interest rate | 2.80% |  |  |
Senior notes, face amount | $ 318 |  |  |
Senior notes | $ 0 |  |  | 319
Series W Notes, maturing October 1, 2034 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 4.50% |  |  |
Effective interest rate | 4.10% |  |  |
Senior notes, face amount | $ 278 |  |  |
Senior notes | $ 287 |  |  | 287
Series X Notes, maturing April 15, 2028 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 4.00% |  |  |
Effective interest rate | 4.20% |  |  |
Senior notes, face amount | $ 450 |  |  |
Senior notes | $ 448 |  |  | 447
Series AA Notes, maturing December 1, 2028 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 4.70% |  |  |
Effective interest rate | 4.80% |  |  |
Senior notes, face amount | $ 300 |  |  |
Senior notes | $ 299 |  |  | 298
Series EE Notes, matured May 1, 2025 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 5.80% |  |  |
Effective interest rate | 6.00% |  |  |
Senior notes, face amount | $ 600 |  |  |
Senior notes | $ 0 |  |  | 599
Series FF Notes, maturing June 15, 2030 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 4.60% |  |  |
Effective interest rate | 4.80% |  |  |
Senior notes, face amount | $ 1,000 |  |  |
Senior notes | $ 992 |  |  | 991
Series GG Notes, maturing October 15, 2032 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 3.50% |  |  |
Effective interest rate | 3.70% |  |  |
Senior notes, face amount | $ 1,000 |  |  |
Senior notes | $ 990 |  |  | 989
Series HH Notes, maturing April 15, 2031 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 2.90% |  |  |
Effective interest rate | 3.00% |  |  |
Senior notes, face amount | $ 1,100 |  |  |
Senior notes | $ 1,093 |  |  | 1,093
Series II Notes, maturing October 15, 2033 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 2.80% |  |  |
Effective interest rate | 2.80% |  |  |
Senior notes, face amount | $ 700 |  |  |
Senior notes | $ 695 |  |  | 695
Series JJ Notes, maturing October 15, 2027 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 5.00% |  |  |
Effective interest rate | 5.40% |  |  |
Senior notes, face amount | $ 1,000 |  |  |
Senior notes | $ 993 |  |  | 990
Series KK Notes, maturing April 15, 2029 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 4.90% |  |  |
Effective interest rate | 5.30% |  |  |
Senior notes, face amount | $ 800 |  |  |
Senior notes | $ 790 |  |  | 788
Series LL Notes, maturing September 15, 2026 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 5.50% |  |  |
Effective interest rate | 5.90% |  |  |
Senior notes, face amount | $ 450 |  |  |
Senior notes | $ 448 |  |  | 447
Series MM Notes, maturing October 15, 2028 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 5.60% |  |  |
Effective interest rate | 5.90% |  |  |
Senior notes, face amount | $ 700 |  |  |
Senior notes | $ 694 |  |  | 693
Series NN Notes, maturing May 15, 2029 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 4.90% |  |  |
Effective interest rate | 5.30% |  |  |
Senior notes, face amount | $ 500 |  |  |
Senior notes | $ 493 |  |  | 491
Series OO Notes, maturing May 15, 2034 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 5.30% |  |  |
Effective interest rate | 5.60% |  |  |
Senior notes, face amount | $ 1,000 |  |  |
Senior notes | $ 981 |  |  | 980
Series PP Notes, maturing March 15, 2030 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 4.80% |  |  |
Effective interest rate | 5.00% |  |  |
Senior notes, face amount | $ 500 |  |  |
Senior notes | $ 495 |  |  | 495
Series QQ Notes, maturing March 15, 2035 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 5.40% |  |  |
Effective interest rate | 5.50% |  |  |
Senior notes, face amount | $ 1,000 |  |  |
Senior notes | $ 987 |  |  | 986
Series RR Notes, maturing April 15, 2032 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 5.10% |  |  |
Effective interest rate | 5.40% |  |  |
Senior notes, face amount | $ 500 |  |  |
Senior notes | $ 493 |  |  | 0
Series RR Notes, maturing April 15, 2032 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  |  | 5.10% |
Senior notes, face amount |  |  | $ 500 |
Series SS Notes, maturing April 15, 2037 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 5.50% |  |  |
Effective interest rate | 5.70% |  |  |
Senior notes, face amount | $ 1,500 |  |  |
Senior notes | $ 1,483 |  |  | 0
Series SS Notes, maturing April 15, 2037 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  |  | 5.50% |
Senior notes, face amount |  |  | $ 1,500 |
Series TT Notes, maturing July 15, 2027 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 4.20% |  |  |
Effective interest rate | 4.50% |  |  |
Senior notes, face amount | $ 400 |  |  |
Senior notes | $ 398 |  |  | 0
Series TT Notes, maturing July 15, 2027 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 4.20% |  |
Senior notes, face amount |  | $ 400 |  |
Series UU Notes, maturing October 15, 2031 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 4.50% |  |  |
Effective interest rate | 4.90% |  |  |
Senior notes, face amount | $ 500 |  |  |
Senior notes | $ 491 |  |  | 0
Series UU Notes, maturing October 15, 2031 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 4.50% |  |
Senior notes, face amount |  | $ 500 |  |
Series VV Notes, maturing October 15, 2035 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 5.30% |  |  |
Effective interest rate | 5.50% |  |  |
Senior notes, face amount | $ 600 |  |  |
Senior notes | $ 592 |  |  | $ 0
Series VV Notes, maturing October 15, 2035 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 5.25% |  |
Senior notes, face amount |  | $ 600 |  |

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