CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Millions	Total	Common Stock and Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income/(Loss)
Beginning balances (in shares) at Sep. 26, 2015		5,578,753
Beginning balances at Sep. 26, 2015	$ 119,355	$ 27,416	$ 92,284	$ (345)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	45,687	0	45,687	0
Other comprehensive income/(loss)	979	0	0	979
Dividends and dividend equivalents declared	(12,188)	$ 0	(12,188)	0
Repurchase of common stock (in shares)		(279,609)
Repurchase of common stock	(29,000)	$ 0	(29,000)	0
Share-based compensation	4,262	$ 4,262	0	0
Common stock issued, net of shares withheld for employee taxes (in shares)		37,022
Common stock issued, net of shares withheld for employee taxes	(1,225)	$ (806)	(419)	0
Tax benefit from equity awards, including transfer pricing adjustments	379	$ 379	0	0
Ending balances (in shares) at Sep. 24, 2016		5,336,166
Ending balances at Sep. 24, 2016	128,249	$ 31,251	96,364	634
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	48,351	0	48,351	0
Other comprehensive income/(loss)	(784)	0	0	(784)
Dividends and dividend equivalents declared	(12,803)	$ 0	(12,803)	0
Repurchase of common stock (in shares)		(246,496)
Repurchase of common stock	(33,001)	$ 0	(33,001)	0
Share-based compensation	4,909	$ 4,909	0	0
Common stock issued, net of shares withheld for employee taxes (in shares)		36,531
Common stock issued, net of shares withheld for employee taxes	(1,494)	$ (913)	(581)	0
Tax benefit from equity awards, including transfer pricing adjustments	$ 620	$ 620	0	0
Ending balances (in shares) at Sep. 30, 2017	5,126,201	5,126,201
Ending balances at Sep. 30, 2017	$ 134,047	$ 35,867	98,330	(150)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of change in accounting principle	0	0	278	(278)
Net income	59,531	0	59,531	0
Other comprehensive income/(loss)	(3,026)	0	0	(3,026)
Dividends and dividend equivalents declared	$ (13,735)	$ 0	(13,735)	0
Repurchase of common stock (in shares)	(405,500)	(405,549)
Repurchase of common stock	$ (73,056)	$ 0	(73,056)	0
Share-based compensation	5,443	$ 5,443	0	0
Common stock issued, net of shares withheld for employee taxes (in shares)		34,334
Common stock issued, net of shares withheld for employee taxes	$ (2,057)	$ (1,109)	(948)	0
Ending balances (in shares) at Sep. 29, 2018	4,754,986	4,754,986
Ending balances at Sep. 29, 2018	$ 107,147	$ 40,201	$ 70,400	$ (3,454)