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Property, Plant, and Equipment (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Property, Plant and Equipment [Line Items] |  |
Gross property, plant and equipment | $ 19,940 | $ 22,026
Accumulated depreciation | 12,630 | 13,153
Net property, plant and equipment | 7,310 | 8,873
Impairment of Long-Lived Assets Held-for-use | 1,400 |
Land |  |
Property, Plant and Equipment [Line Items] |  |
Gross property, plant and equipment | 202 | 252
Building and Building Improvements [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Gross property, plant and equipment | $ 3,167 | $ 3,461
Building and Building Improvements [Member] | 1 - 10 years |  |
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract] |  |
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths) | 12.00% | 11.00%
Building and Building Improvements [Member] | 11 - 20 years |  |
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract] |  |
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths) | 41.00% | 42.00%
Building and Building Improvements [Member] | 21 - 30 years |  |
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract] |  |
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths) | 22.00% | 22.00%
Building and Building Improvements [Member] | 31 - 40 years |  |
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract] |  |
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths) | 25.00% | 25.00%
Machinery, equipment and other |  |
Property, Plant and Equipment [Line Items] |  |
Gross property, plant and equipment | $ 16,571 | $ 18,313
Machinery, equipment and other | 1 - 5 years |  |
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract] |  |
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths) | 43.00% | 34.00%
Machinery, equipment and other | 6 - 10 years |  |
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract] |  |
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths) | 47.00% | 56.00%
Machinery, equipment and other | 11 - 20 years |  |
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract] |  |
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths) | 10.00% | 10.00%
Minimum | Building and Building Improvements [Member] | 1 - 10 years |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant, and equipment useful lives | 1 year |
Minimum | Building and Building Improvements [Member] | 11 - 20 years |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant, and equipment useful lives | 11 years |
Minimum | Building and Building Improvements [Member] | 21 - 30 years |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant, and equipment useful lives | 21 years |
Minimum | Building and Building Improvements [Member] | 31 - 40 years |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant, and equipment useful lives | 31 years |
Minimum | Machinery, equipment and other | 1 - 5 years |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant, and equipment useful lives | 1 year |
Minimum | Machinery, equipment and other | 6 - 10 years |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant, and equipment useful lives | 6 years |
Minimum | Machinery, equipment and other | 11 - 20 years |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant, and equipment useful lives | 11 years |
Maximum | Building and Building Improvements [Member] | 1 - 10 years |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant, and equipment useful lives | 10 years |
Maximum | Building and Building Improvements [Member] | 11 - 20 years |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant, and equipment useful lives | 20 years |
Maximum | Building and Building Improvements [Member] | 21 - 30 years |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant, and equipment useful lives | 30 years |
Maximum | Building and Building Improvements [Member] | 31 - 40 years |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant, and equipment useful lives | 40 years |
Maximum | Machinery, equipment and other | 1 - 5 years |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant, and equipment useful lives | 5 years |
Maximum | Machinery, equipment and other | 6 - 10 years |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant, and equipment useful lives | 10 years |
Maximum | Machinery, equipment and other | 11 - 20 years |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant, and equipment useful lives | 20 years |

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