CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Mar. 30, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 11,561	$ 13,822	$ 31,526	$ 33,887
Other comprehensive income/(loss):
Change in foreign currency translation, net of tax	174	263	96	303
Change in unrealized gains/losses on derivative instruments, net of tax:
Change in fair value of derivatives	(50)	(27)	(384)	61
Adjustment for net (gains)/losses realized and included in net income	(105)	(207)	(63)	(105)
Total change in unrealized gains/losses on derivative instruments	(155)	(234)	(447)	(44)
Change in unrealized gains/losses on marketable securities, net of tax:
Change in fair value of marketable securities	2,042	(2,003)	2,152	(2,849)
Adjustment for net (gains)/losses realized and included in net income	28	29	65	(46)
Total change in unrealized gains/losses on marketable securities	2,070	(1,974)	2,217	(2,895)
Total other comprehensive income/(loss)	2,089	(1,945)	1,866	(2,636)
Total comprehensive income	$ 13,650	$ 11,877	$ 33,392	$ 31,251