| **Restructuring Charges and Other Costs Associated with Acquisitions and Cost-Reduction/Productivity Initiatives - Restructuring Accruals (Detail) (USD $)In Millions, unless otherwise specified**                                                                       | 3 Months Ended |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------|
||
| **Restructuring Reserve [Roll Forward]**                                                                                                                                                                                                                                  |           |  |
| Balance, December 31, 2013(a)                                                                                                                                                                                                                                             | $ 1,779        | [1] |
| Provision                                                                                                                                                                                                                                                                 | 40             |  |
| Utilization and other(b)                                                                                                                                                                                                                                                  | (146)          | [2] |
| Balance, March 30, 2014(c)                                                                                                                                                                                                                                                | 1,673          | [3] |
| Employee Termination Costs [Member]                                                                                                                                                                                                                                       |           |  |
| **Restructuring Reserve [Roll Forward]**                                                                                                                                                                                                                                  |           |  |
| Balance, December 31, 2013(a)                                                                                                                                                                                                                                             | 1,685          | [1] |
| Provision                                                                                                                                                                                                                                                                 | 30             |  |
| Utilization and other(b)                                                                                                                                                                                                                                                  | (115)          | [2] |
| Balance, March 30, 2014(c)                                                                                                                                                                                                                                                | 1,600          | [3] |
| Asset Impairments [Member]                                                                                                                                                                                                                                                |           |  |
| **Restructuring Reserve [Roll Forward]**                                                                                                                                                                                                                                  |           |  |
| Balance, December 31, 2013(a)                                                                                                                                                                                                                                             | 0              | [1] |
| Provision                                                                                                                                                                                                                                                                 | 6              |  |
| Utilization and other(b)                                                                                                                                                                                                                                                  | (6)            | [2] |
| Balance, March 30, 2014(c)                                                                                                                                                                                                                                                | 0              | [3] |
| Exit Costs [Member]                                                                                                                                                                                                                                                       |           |  |
| **Restructuring Reserve [Roll Forward]**                                                                                                                                                                                                                                  |           |  |
| Balance, December 31, 2013(a)                                                                                                                                                                                                                                             | 94             | [1] |
| Provision                                                                                                                                                                                                                                                                 | 4              |  |
| Utilization and other(b)                                                                                                                                                                                                                                                  | (25)           | [2] |
| Balance, March 30, 2014(c)                                                                                                                                                                                                                                                | $ 73           | [3] |
|                                                                                                                                                                                                                                                                           |
| [1]Included in Other current liabilities ($1.0 billion) and Other noncurrent liabilities ($767 million).[2]Includes adjustments for foreign currency translation.[3]Included in Other current liabilities ($968 million) and Other noncurrent liabilities ($705 million). |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of any reversal and other adjustment made during the period to the amount of a previously accrued liability for a specified type of restructuring cost, excluding adjustments for costs incurred during the period, costs settled during the period, and foreign currency translation adjustments.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 40 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394291&loc=d3e17658-110867
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Net total Increase or Decrease in the accrual for restructuring costs during the reporting period.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4
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| X                                                                                                                                                                   |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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