CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 11,519	$ 8,717	$ 45,406	$ 37,637
Other comprehensive income/(loss):
Change in foreign currency translation, net of tax effects of $(3), $(35), $4 and $(3), respectively	(590)	120	(287)	(41)
Change in unrealized gains/losses on derivative instruments:
Change in fair value of derivatives, net of tax benefit/(expense) of $70, $(16), $(60) and $(269), respectively	109	(166)	170	1,002
Adjustment for net (gains)/losses realized and included in net income, net of tax expense/(benefit) of $(254), $176, $(198) and $276, respectively	978	(409)	873	(1,135)
Total change in unrealized gains/losses on derivative instruments, net of tax	1,087	(575)	1,043	(133)
Change in unrealized gains/losses on marketable securities:
Change in fair value of marketable securities, net of tax benefit/(expense) of $154, $(197), $1,159 and $536, respectively	(568)	364	(3,417)	(980)
Adjustment for net (gains)/losses realized and included in net income, net of tax expense/(benefit) of $(7), $16, $27 and $12, respectively	24	(32)	(22)	(25)
Total change in unrealized gains/losses on marketable securities, net of tax	(544)	332	(3,439)	(1,005)
Total other comprehensive income/(loss)	(47)	(123)	(2,683)	(1,179)
Total comprehensive income	$ 11,472	$ 8,594	$ 42,723	$ 36,458