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Borrowings - Schedule of Borrowings (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Aug. 15, 2025 | Dec. 31, 2024
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Commercial paper | $ 1,247 |  | $ 2,119
Finance lease liabilities | 1,357 |  | 1,360
Total debt principal | 66,314 |  | 66,747
Debt premiums | 160 |  | 170
Debt discounts and deferred financing costs | (638) |  | (647)
Long-term debt and lease obligation | 65,836 |  | 66,270
Short-term debt (commercial paper) | (1,247) |  | (2,119)
Current portion of long-term debt | (4,081) |  | (3,624)
Long-term debt | $ 60,508 |  | $ 60,527
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] | Long-term debt, Current portion of long-term debt |  | Long-term debt, Current portion of long-term debt
Senior Notes | 4.1% senior notes due March 2025 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate |  |  | 4.10%
Long-term debt | $ 0 |  | $ 724
Senior Notes | 3.875% senior notes due July 2025 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate |  |  | 3.875%
Long-term debt | $ 0 |  | $ 2,828
Senior Notes | 5% senior notes due February 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.00% |  |
Long-term debt | $ 1,500 |  | 1,500
Senior Notes | 2.875% senior notes due June 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 2.875% |  |
Long-term debt | $ 1,750 |  | 1,750
Senior Notes | 3% senior notes due August 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 3.00% |  |
Long-term debt | $ 750 |  | 750
Senior Notes | 3.625% senior notes due April 2027 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 3.625% |  |
Long-term debt | $ 750 |  | 750
Senior Notes | 6.25% senior notes due June 2027 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 6.25% |  |
Long-term debt | $ 372 |  | 372
Senior Notes | 1.3% senior notes due August 2027 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 1.30% |  |
Long-term debt | $ 2,250 |  | 2,250
Senior Notes | 4.3% senior notes due March 2028 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 4.30% |  |
Long-term debt | $ 5,000 |  | 5,000
Senior Notes | 5% senior notes due January 2029 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.00% |  |
Long-term debt | $ 1,000 |  | 1,000
Senior Notes | 5.4% senior notes due June 2029 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.40% |  |
Long-term debt | $ 1,000 |  | 1,000
Senior Notes | 3.25% senior notes due August 2029 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 3.25% |  |
Long-term debt | $ 1,750 |  | 1,750
Senior Notes | 5.125% senior notes due February 2030 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.125% |  |
Long-term debt | $ 1,500 |  | 1,500
Senior Notes | 3.75% senior notes due April 2030 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 3.75% |  |
Long-term debt | $ 1,500 |  | 1,500
Senior Notes | 1.75% senior notes due August 2030 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 1.75% |  |
Long-term debt | $ 1,250 |  | 1,250
Senior Notes | 5.25% senior notes due January 2031 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.25% |  |
Long-term debt | $ 750 |  | 750
Senior Notes | 1.875% senior notes due February 2031 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 1.875% |  |
Long-term debt | $ 1,250 |  | 1,250
Senior Notes | 5.55% senior notes due June 2031 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.55% |  |
Long-term debt | $ 1,000 |  | 1,000
Senior Notes | 2.125% senior notes due September 2031 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 2.125% |  |
Long-term debt | $ 1,000 |  | 1,000
Senior Notes | 5% senior notes due September 2032 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.00% | 5.00% |
Long-term debt | $ 750 |  | 0
Senior Notes | 5.25% senior notes due February 2033 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.25% |  |
Long-term debt | $ 1,750 |  | 1,750
Senior Notes | 5.3% senior notes due June 2033 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.30% |  |
Long-term debt | $ 1,250 |  | 1,250
Senior Notes | 5.7% senior notes due June 2034 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.70% |  |
Long-term debt | $ 1,250 |  | 1,250
Senior Notes | 4.875% senior notes due July 2035 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 4.875% |  |
Long-term debt | $ 652 |  | 652
Senior Notes | 5.45% senior notes due September 2035 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.45% | 5.45% |
Long-term debt | $ 1,500 |  | 0
Senior Notes | 6.625% senior notes due June 2036 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 6.625% |  |
Long-term debt | $ 771 |  | 771
Senior Notes | 6.75% senior notes due December 2037 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 6.75% |  |
Long-term debt | $ 533 |  | 533
Senior Notes | 4.78% senior notes due March 2038 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 4.78% |  |
Long-term debt | $ 5,000 |  | 5,000
Senior Notes | 6.125% senior notes due September 2039 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 6.125% |  |
Long-term debt | $ 447 |  | 447
Senior Notes | 4.125% senior notes due April 2040 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 4.125% |  |
Long-term debt | $ 602 |  | 602
Senior Notes | 2.7% senior notes due August 2040 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 2.70% |  |
Long-term debt | $ 367 |  | 367
Senior Notes | 5.75% senior notes due May 2041 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.75% |  |
Long-term debt | $ 133 |  | 133
Senior Notes | 4.5% senior notes due May 2042 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 4.50% |  |
Long-term debt | $ 500 |  | 500
Senior Notes | 4.125% senior notes due November 2042 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 4.125% |  |
Long-term debt | $ 226 |  | 226
Senior Notes | 5.3% senior notes due December 2043 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.30% |  |
Long-term debt | $ 750 |  | 750
Senior Notes | 4.75% senior notes due March 2044 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 4.75% |  |
Long-term debt | $ 375 |  | 375
Senior Notes | 6% senior notes due June 2044 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 6.00% |  |
Long-term debt | $ 750 |  | 750
Senior Notes | 5.125% senior notes due July 2045 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.125% |  |
Long-term debt | $ 3,500 |  | 3,500
Senior Notes | 3.875% senior notes due August 2047 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 3.875% |  |
Long-term debt | $ 537 |  | 537
Senior Notes | 5.05% senior notes due March 2048 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.05% |  |
Long-term debt | $ 8,000 |  | 8,000
Senior Notes | 4.25% senior notes due April 2050 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 4.25% |  |
Long-term debt | $ 399 |  | 399
Senior Notes | 5.625% senior notes due February 2053 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.625% |  |
Long-term debt | $ 1,250 |  | 1,250
Senior Notes | 5.875% senior notes due June 2053 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.875% |  |
Long-term debt | $ 1,250 |  | 1,250
Senior Notes | 6.05% senior notes due June 2054 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 6.05% |  |
Long-term debt | $ 1,000 |  | 1,000
Senior Notes | 6.2% senior notes due September 2055 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 6.20% | 6.20% |
Long-term debt | $ 1,250 |  | 0
Senior Notes | 6% senior notes due June 2063 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 6.00% |  |
Long-term debt | $ 750 |  | 750
Senior Notes | 6.25% senior notes due September 2065 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 6.25% | 6.25% |
Long-term debt | $ 500 |  | 0
Other Debt Obligations |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt | $ 296 |  | 302
Junior Subordinated Debt | 6.75% series B junior subordinated notes due December 2054 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 6.75% |  |
Long-term debt | $ 750 |  | 750
Junior Subordinated Debt | 7% series A junior subordinated notes due March 2055 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 7.00% |  |
Long-term debt | $ 2,250 |  | $ 2,250

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