|**Property, Plant and Equipment (PP&E) (Tables)**                        | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                             
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|**Property, Plant and Equipment [Abstract]**                             |                                                                                                                                                                                                                                                                                                                                                                                             
|Schedule of Components of Property, Plant and Equipment                  | The following summarizes the components ofProperty, plant and equipment:Useful LivesAs of December 31,(MILLIONS)(Years)20212020Land-$423$443Buildings33-509,0018,998Machinery and equipment8-2012,25211,000Furniture, fixtures and other3-12.54,4574,484Construction in progress-3,8223,48129,95528,406Less: Accumulated depreciation15,07414,661Property, plant and equipment$14,882$13,745
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|The following summarizes the components ofProperty, plant and equipment:
|                                                                         |                                                                                                                                                                                                                                                                                                                                                                                             
|(MILLIONS)                                                               |                                                                                                                                                                                                                                                                                                                                                                                             
|Land                                                                     |                                                                                                                                                                                                                                                                                                                                                                                             
|Buildings                                                                |                                                                                                                                                                                                                                                                                                                                                                                             
|Machinery and equipment                                                  |                                                                                                                                                                                                                                                                                                                                                                                             
|Furniture, fixtures and other                                            |                                                                                                                                                                                                                                                                                                                                                                                             
|Construction in progress                                                 |                                                                                                                                                                                                                                                                                                                                                                                             
|                                                                         |                                                                                                                                                                                                                                                                                                                                                                                             
|Less: Accumulated depreciation                                           |                                                                                                                                                                                                                                                                                                                                                                                             
|Property, plant and equipment                                            |                                                                                                                                                                                                                                                                                                                                                                                             
|Long-lived Assets by Geographic Areas                                    | The following provides long-lived assets by geographic area:As of December 31,(MILLIONS)20212020Property, plant and equipmentUnited States$8,385$7,666Developed Europe5,0944,775Developed Rest of World347413Emerging Markets1,056890Property, plant and equipment$14,882$13,745                                                                                                            
|                                                                         |                                                                                                                                                                                                                                                                                                                                                                                             
|The following provides long-lived assets by geographic area:            
|                                                                         |                                                                                                                                                                                                                                                                                                                                                                                             
|(MILLIONS)                                                               |                                                                                                                                                                                                                                                                                                                                                                                             
|Property, plant and equipment                                            |                                                                                                                                                                                                                                                                                                                                                                                             
|United States                                                            |                                                                                                                                                                                                                                                                                                                                                                                             
|Developed Europe                                                         |                                                                                                                                                                                                                                                                                                                                                                                             
|Developed Rest of World                                                  |                                                                                                                                                                                                                                                                                                                                                                                             
|Emerging Markets                                                         |                                                                                                                                                                                                                                                                                                                                                                                             
|Property, plant and equipment                                            |                                                                                                                                                                                                                                                                                                                                                                                             

X- DefinitionTabular disclosure of long-lived assets, excluding financial instruments, long-term customer relationships of a financial institution, mortgage rights, deferred policy acquisition costs, and deferred tax assets, by geographic areas located in the entity's country of domicile and foreign countries in which the entity holds assets.
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duration X- DefinitionTabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.
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