CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 11,249	$ 11,561	$ 33,485	$ 31,526
Other comprehensive income/(loss):
Change in foreign currency translation, net of tax	(566)	174	(364)	96
Change in unrealized gains/losses on derivative instruments, net of tax:
Change in fair value of derivatives	(143)		(32)
Change in fair value of derivatives		(50)		(384)
Adjustment for net (gains)/losses realized and included in net income	634		236
Adjustment for net (gains)/losses realized and included in net income		(105)		(63)
Total change in unrealized gains/losses on derivative instruments	491		204
Total change in unrealized gains/losses on derivative instruments		(155)		(447)
Change in unrealized gains/losses on marketable debt securities, net of tax:
Change in fair value of marketable debt securities	(2,325)	2,042	(2,200)	2,152
Adjustment for net (gains)/losses realized and included in net income	29	28	19	65
Total change in unrealized gains/losses on marketable debt securities	(2,296)	2,070	(2,181)	2,217
Total other comprehensive income/(loss)	(2,371)	2,089	(2,341)	1,866
Total comprehensive income	$ 8,878	$ 13,650	$ 31,144	$ 33,392