|**Inventories (Tables)**                                   | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                    
|---------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
|**Inventory Disclosure [Abstract]**                        |                                                                                                                                                                                                                                                                                                                                                                                   
|Schedule of Components of Inventories, Current             | The following table provides the components ofInventories:(MILLIONS OF DOLLARS)July 3, 2016December 31, 2015Finished goods$2,734$2,714Work-in-process3,9313,932Raw materials and supplies950867Inventories$7,614$7,513Noncurrent inventories not included above(a)$594$594(a)Included inOther noncurrent assets. There are no recoverability issues associated with these amounts.
|                                                          
|                                                           |                                                                                                                                                                                                                                                                                                                                                                                   
|The following table provides the components ofInventories:
|(MILLIONS OF DOLLARS)                                      |                                                                                                                                                                                                                                                                                                                                                                                   
|Finished goods                                             |                                                                                                                                                                                                                                                                                                                                                                                   
|Work-in-process                                            |                                                                                                                                                                                                                                                                                                                                                                                   
|Raw materials and supplies                                 |                                                                                                                                                                                                                                                                                                                                                                                   
|Inventories                                                |                                                                                                                                                                                                                                                                                                                                                                                   
|Noncurrent inventories not included above(a)               |                                                                                                                                                                                                                                                                                                                                                                                   
|                                                           |                                                                                                                                                                                                                                                                                                                                                                                   
|(a)                                                        | Included inOther noncurrent assets. There are no recoverability issues associated with these amounts.                                                                                                                                                                                                                                                                             
|Schedule of Components of Inventories, Noncurrent          | The following table provides the components ofInventories:(MILLIONS OF DOLLARS)July 3, 2016December 31, 2015Finished goods$2,734$2,714Work-in-process3,9313,932Raw materials and supplies950867Inventories$7,614$7,513Noncurrent inventories not included above(a)$594$594(a)Included inOther noncurrent assets. There are no recoverability issues associated with these amounts.
|                                                          
|                                                           |                                                                                                                                                                                                                                                                                                                                                                                   
|The following table provides the components ofInventories:
|(MILLIONS OF DOLLARS)                                      |                                                                                                                                                                                                                                                                                                                                                                                   
|Finished goods                                             |                                                                                                                                                                                                                                                                                                                                                                                   
|Work-in-process                                            |                                                                                                                                                                                                                                                                                                                                                                                   
|Raw materials and supplies                                 |                                                                                                                                                                                                                                                                                                                                                                                   
|Inventories                                                |                                                                                                                                                                                                                                                                                                                                                                                   
|Noncurrent inventories not included above(a)               |                                                                                                                                                                                                                                                                                                                                                                                   
|                                                           |                                                                                                                                                                                                                                                                                                                                                                                   
|(a)                                                        | Included inOther noncurrent assets. There are no recoverability issues associated with these amounts.                                                                                                                                                                                                                                                                             

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