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Debt (Schedule of Outstanding Debt) (Details) - USD ($) | Jun. 30, 2024 | Feb. 29, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Mar. 31, 2023
--- | --- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |  |
Commercial paper | $ 749,000,000 |  | $ 0 |  |
Current portion of long-term debt | 518,000,000 |  | 1,619,000,000 |  |
Short-term debt | 1,267,000,000 |  | 1,619,000,000 |  |
Long-term debt | 12,796,000,000 |  | 13,463,000,000 |  |
Long-term debt, net | 12,278,000,000 |  | 11,844,000,000 |  |
Senior notes – 3.50% due 2024 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 0 |  | 600,000,000 |  |
Interest rate | 3.50% |  |  |  |
Senior notes – 3.875% due 2024 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 0 |  | 1,000,000,000 |  |
Interest rate | 3.875% |  |  |  |
Senior notes – 3.50% due 2025 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 500,000,000 |  | 499,000,000 |  |
Interest rate | 3.50% |  |  |  |
Senior notes – 1.349% due 2026 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 593,000,000 |  | 617,000,000 |  |
Interest rate | 1.349% |  |  |  |
Senior notes – 3.75% due 2026 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 599,000,000 |  | 599,000,000 |  |
Interest rate | 3.75% |  |  |  |
Senior notes – 4.375% due 2029 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 1,499,000,000 |  | 1,499,000,000 |  |
Interest rate | 4.375% |  |  |  |
Senior notes – 1.979% due 2030 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 578,000,000 |  | 601,000,000 |  |
Interest rate | 1.979% |  |  |  |
Senior notes – 2.25% due 2030 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 742,000,000 |  | 741,000,000 |  |
Interest rate | 2.25% |  |  |  |
Senior notes – 2.375% due 2031 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 397,000,000 |  | 397,000,000 |  |
Interest rate | 2.375% |  |  |  |
Senior notes – 5.750% due 2032 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 493,000,000 |  | 493,000,000 |  |
Interest rate | 5.75% |  |  |  |
Senior notes – 5.875% due 2033 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 298,000,000 |  | 298,000,000 |  |
Interest rate | 5.875% |  |  |  |
Senior notes – 5.400% due 2033 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 592,000,000 |  | 592,000,000 |  |
Interest rate | 5.40% |  |  | 5.40% |
Senior notes – 5.150% due 2034 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 495,000,000 |  | 0 |  |
Interest rate | 5.15% | 5.15% |  |  |
Senior notes – 4.75% due 2039 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 496,000,000 |  | 496,000,000 |  |
Interest rate | 4.75% |  |  |  |
Senior notes – 4.35% due 2047 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 494,000,000 |  | 494,000,000 |  |
Interest rate | 4.35% |  |  |  |
Senior notes – 4.20% due 2048 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 593,000,000 |  | 593,000,000 |  |
Interest rate | 4.20% |  |  |  |
Senior notes – 4.90% due 2049 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 1,239,000,000 |  | 1,239,000,000 |  |
Interest rate | 4.90% |  |  |  |
Senior notes – 2.90% due 2051 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 346,000,000 |  | 346,000,000 |  |
Interest rate | 2.90% |  |  |  |
Senior notes – 6.25% due 2052 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 491,000,000 |  | 491,000,000 |  |
Interest rate | 6.25% |  |  |  |
Senior notes – 5.450% due 2053 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 591,000,000 |  | 591,000,000 |  |
Interest rate | 5.45% |  |  |  | 5.45%
Senior notes – 5.700% due 2053 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 988,000,000 |  | 988,000,000 |  |
Interest rate | 5.70% |  |  |  |
Senior notes – $5.450% due 2054 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 493,000,000 |  | 0 |  |
Interest rate | 5.45% | 5.45% |  |  |
Mortgage – 5.70% due 2035 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 276,000,000 |  | 284,000,000 |  |
Interest rate | 5.70% |  |  |  |
Other |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 3,000,000 |  | $ 5,000,000 |  |

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