Operating Segments and Geographic Information, Long-Lived Assets (Detail) - USD ($) $ in Millions	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Schedule Of Long-Lived Assets [Line Items]
Property, plant and equipment, net	$ 31,858	$ 33,238	$ 31,428
United States [Member]
Schedule Of Long-Lived Assets [Line Items]
Property, plant and equipment, net	22,611	24,020	23,624
Ireland [Member]
Schedule Of Long-Lived Assets [Line Items]
Property, plant and equipment, net	5,789	5,433	2,986
Israel [Member]
Schedule Of Long-Lived Assets [Line Items]
Property, plant and equipment, net	1,661	1,957	2,667
Other countries [Member]
Schedule Of Long-Lived Assets [Line Items]
Property, plant and equipment, net	1,797	1,828	2,151
Outside the U.S. [Member]
Schedule Of Long-Lived Assets [Line Items]
Property, plant and equipment, net	$ 9,200	$ 9,200	$ 7,800