CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2016	Dec. 26, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 17,891	$ 18,361
Other comprehensive income/(loss):
Change in foreign currency translation, net of tax effects of $76 and $19, respectively	(375)	(102)
Change in unrealized gains/losses on derivative instruments:
Change in fair value of derivatives, net of tax benefit/(expense) of $(228) and $(38), respectively	1,468	287
Adjustment for net (gains)/losses realized and included in net income, net of tax expense/(benefit) of $(211) and $66, respectively	306	(445)
Total change in unrealized gains/losses on derivative instruments, net of tax	1,774	(158)
Change in unrealized gains/losses on marketable securities:
Change in fair value of marketable securities, net of tax benefit/(expense) of $989 and $508, respectively	(1,808)	(922)
Adjustment for net (gains)/losses realized and included in net income, net of tax expense/(benefit) of $(11) and $(26), respectively	20	47
Total change in unrealized gains/losses on marketable securities, net of tax	(1,788)	(875)
Total other comprehensive income/(loss)	(389)	(1,135)
Total comprehensive income	$ 17,502	$ 17,226