|**Restructuring Charges and Other Costs Associated with Acquisitions and Cost-Reduction/Productivity Initiatives - Asset Impairment Charges (Detail) (USD $)In Millions, unless otherwise specified**                                                                                                                                                                                                                                                                                                                                                                                                | 9 Months Ended                                                                                                                                                                                                                                                                                                                    
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
|**Impaired Long-Lived Assets Held and Used [Line Items]**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |                                                                                                                                                                                                                                                                                                                                   
|Assets held for sale(b)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | $ 84                                                                                                                                                                                                                                                                                                                              
|Assets held for sale, impairment                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     | 64                                                                                                                                                                                                                                                                                                                                
|Assets abandoned/demolished                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | 0                                                                                                                                                                                                                                                                                                                                 
|Assets abandoned/demolished, impairment                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | 51                                                                                                                                                                                                                                                                                                                                
|Long-lived assets                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | 84                                                                                                                                                                                                                                                                                                                                
|Long-lived assets, impairment                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | 115                                                                                                                                                                                                                                                                                                                               
|Fair Value, Inputs, Level 1 [Member]                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                   
|**Impaired Long-Lived Assets Held and Used [Line Items]**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |                                                                                                                                                                                                                                                                                                                                   
|Assets held for sale(b)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | 0                                                                                                                                                                                                                                                                                                                                 
|Assets abandoned/demolished                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | 0                                                                                                                                                                                                                                                                                                                                 
|Long-lived assets                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | 0                                                                                                                                                                                                                                                                                                                                 
|Fair Value, Inputs, Level 2 [Member]                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                   
|**Impaired Long-Lived Assets Held and Used [Line Items]**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |                                                                                                                                                                                                                                                                                                                                   
|Assets held for sale(b)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | 84                                                                                                                                                                                                                                                                                                                                
|Assets abandoned/demolished                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | 0                                                                                                                                                                                                                                                                                                                                 
|Long-lived assets                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | 84                                                                                                                                                                                                                                                                                                                                
|Fair Value, Inputs, Level 3 [Member]                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                   
|**Impaired Long-Lived Assets Held and Used [Line Items]**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |                                                                                                                                                                                                                                                                                                                                   
|Assets held for sale(b)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | 0                                                                                                                                                                                                                                                                                                                                 
|Assets abandoned/demolished                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | 0                                                                                                                                                                                                                                                                                                                                 
|Long-lived assets                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | $ 0                                                                                                                                                                                                                                                                                                                               
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|[1]
              The fair value amount is presented as of the date of impairment, as these assets are not measured at fair value on a recurring basis. See also Note 1C. Basis of Presentation and Significant Accounting Policies: Fair Value.[2]
              Reflects property, plant and equipment and other long-lived held-for-sale assets written down to their fair value, less costs to sell of $2 million (a net of $82 million), in the first nine months of 2013. Fair value was determined primarily using a market approach, with various inputs, such as recent sales transactions. | [1]                                                                                                                                                                                                                                                                                                                               
|[1]                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | The fair value amount is presented as of the date of impairment, as these assets are not measured at fair value on a recurring basis. See also Note 1C. Basis of Presentation and Significant Accounting Policies: Fair Value.                                                                                                    
|[2]                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | Reflects property, plant and equipment and other long-lived held-for-sale assets written down to their fair value, less costs to sell of $2 million (a net of $82 million), in the first nine months of 2013. Fair value was determined primarily using a market approach, with various inputs, such as recent sales transactions.

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