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Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Inventories | $ 3,494 | $ 2,980
Other noncurrent assets | 2,009 | $ 1,671
Revision of Prior Period, Reclassification, Adjustment |  |
Inventories | 302 |
Other noncurrent assets | $ (302) |
Employee Stock Option |  |
Vesting period | 10 years |
Restricted Stock Units (RSUs) |  |
Performance period | 3 years |
Performance Stock Units (PSUs) |  |
Vesting period | 3 years |
Minimum |  |
Finite-lived intangible asset, useful life | 4 years |
Maximum |  |
Finite-lived intangible asset, useful life | 40 years |
Building and Improvements | Minimum |  |
Property, plant and equipment useful life | 3 years |
Building and Improvements | Maximum |  |
Property, plant and equipment useful life | 30 years |
Machinery and Equipment | Minimum |  |
Property, plant and equipment useful life | 3 years |
Machinery and Equipment | Maximum |  |
Property, plant and equipment useful life | 15 years |

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