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Debt (Schedule Of Outstanding Debt) (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Debt Instrument [Line Items] |  |
Current portion of long-term debt | $ 17 | $ 517
Short-term debt | 17 | 517
Long-term debt | 10,950 | 11,313
Long-term debt, net | 10,933 | 10,796
Senior notes – 4.80% due 2021 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 0 | 500
Interest rate | 4.80% |
Senior notes – 2.75% due 2022 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 0 | 499
Interest rate | 2.75% |
Senior notes – 3.30% due 2023 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 349 | 349
Interest rate | 3.30% |
Senior notes – 4.05% due 2023 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 249 | 249
Interest rate | 4.05% |
Senior notes – 3.50% due 2024 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 599 | 598
Interest rate | 3.50% |
Senior notes – 3.875% due 2024 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 997 | 995
Interest rate | 3.875% |
Senior notes – 3.50% due 2025 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 498 | 498
Interest rate | 3.50% |
Senior notes – 1.349% due 2026 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 629 | 677
Interest rate | 1.349% |
Senior notes – 3.75% due 2026 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 598 | 597
Interest rate | 3.75% |
Senior notes – 4.375% due 2029 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 1,499 | 1,499
Interest rate | 4.375% |
Senior notes – 1.979% due 2030 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 614 | 664
Interest rate | 1.979% |
Senior notes – 2.25% due 2030 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 739 | 737
Interest rate | 2.25% |
Senior notes – 2.375% due 2031 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 397 | 0
Interest rate | 2.375% |
Senior notes – 5.875% due 2033 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 298 | 298
Interest rate | 5.875% |
Senior notes – 4.75% due 2039 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 495 | 495
Interest rate | 4.75% |
Senior notes – 4.35% due 2047 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 493 | 493
Interest rate | 4.35% |
Senior notes – 4.20% due 2048 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 593 | 592
Interest rate | 4.20% |
Senior notes – 4.90% due 2049 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 1,238 | 1,237
Interest rate | 4.90% |
Senior notes – 2.90% due 2051 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 346 | 0
Interest rate | 2.90% |
Mortgage – 5.70% due 2035 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 316 | 331
Interest rate | 5.70% |
Other |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 3 | $ 5

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