Quarterly report pursuant to Section 13 or 15(d)

Inventories (Detail)

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Inventories (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 28, 2015
Dec. 27, 2014
Inventory, Net, Items Net of Reserve Alternative [Abstract]    
Raw materials $ 528us-gaap_InventoryRawMaterialsNetOfReserves $ 462us-gaap_InventoryRawMaterialsNetOfReserves
Work in process 2,190us-gaap_InventoryWorkInProcessNetOfReserves 2,375us-gaap_InventoryWorkInProcessNetOfReserves
Finished goods 1,700us-gaap_InventoryFinishedGoodsNetOfReserves 1,436us-gaap_InventoryFinishedGoodsNetOfReserves
Total inventories $ 4,418us-gaap_InventoryNet $ 4,273us-gaap_InventoryNet