| **Inventories (Detail) (USD $)In Millions, unless otherwise specified**                                                                          | Mar. 29, 2015                                            | Dec. 31, 2014 |
|--------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------|---------------|
| **Inventory Disclosure [Abstract]**                                                                                                              |                                                     |               |   |  |
| Finished goods                                                                                                                                   | $ 1,898us-gaap_InventoryFinishedGoodsNetOfReserves       |               | $ 1,905us-gaap_InventoryFinishedGoodsNetOfReserves |  |
| Work-in-process                                                                                                                                  | 3,414us-gaap_InventoryWorkInProcessNetOfReserves         |               | 3,248us-gaap_InventoryWorkInProcessNetOfReserves |  |
| Raw materials and supplies                                                                                                                       | 475us-gaap_InventoryRawMaterialsAndSuppliesNetOfReserves |               | 510us-gaap_InventoryRawMaterialsAndSuppliesNetOfReserves |  |
| Inventories                                                                                                                                      | 5,786us-gaap_InventoryNet                                | [1]           | 5,663us-gaap_InventoryNet | [1] |
| Noncurrent inventories not included above                                                                                                        | $ 467us-gaap_InventoryNoncurrent                         | [2]           | $ 425us-gaap_InventoryNoncurrent | [2] |
|                                                                                                                                                  |
| [1]Amounts may not add due to rounding.[2]Included in Other noncurrent assets. There are no recoverability issues associated with these amounts. |

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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Inventories not expected to be converted to cash, sold or exchanged within the normal operating cycle.
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Aggregated amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed. This amount is net of valuation reserves and adjustments.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.
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