Segment Information and Geographic Data - Net Sales (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 24, 2016	Jun. 25, 2016	Mar. 26, 2016	Dec. 26, 2015	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 27, 2014	Sep. 24, 2016	Sep. 26, 2015	Sep. 27, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 46,852	$ 42,358	$ 50,557	$ 75,872	$ 51,501	$ 49,605	$ 58,010	$ 74,599	$ 215,639	$ 233,715	$ 182,795
U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									75,667	81,732	68,909
CHINA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									46,349	56,547	30,638
Other countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									$ 93,623	$ 95,436	$ 83,248