CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 24, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 59,531	$ 48,351	$ 45,687
Other comprehensive income/(loss):
Change in foreign currency translation, net of tax effects of $(1), $(77) and $8, respectively	(525)	224	75
Change in unrealized gains/losses on derivative instruments:
Change in fair value of derivatives, net of tax benefit/(expense) of $(149), $(478) and $(7), respectively	523	1,315	7
Adjustment for net (gains)/losses realized and included in net income, net of tax expense/(benefit) of $(104), $475 and $131, respectively	382	(1,477)	(741)
Total change in unrealized gains/losses on derivative instruments, net of tax	905	(162)	(734)
Change in unrealized gains/losses on marketable securities:
Change in fair value of marketable securities, net of tax benefit/(expense) of $1,156, $425 and $(863), respectively	(3,407)	(782)	1,582
Adjustment for net (gains)/losses realized and included in net income, net of tax expense/(benefit) of $21, $35 and $(31), respectively	1	(64)	56
Total change in unrealized gains/losses on marketable securities, net of tax	(3,406)	(846)	1,638
Total other comprehensive income/(loss)	(3,026)	(784)	979
Total comprehensive income	$ 56,505	$ 47,567	$ 46,666