Benefit Plans - Additional Information (Details) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 01, 2017 USD ($) shares	Jun. 25, 2016 USD ($)	Jul. 01, 2017 USD ($) shares	Jun. 25, 2016 USD ($)
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Shares reserved for future issuance under stock plans (in shares) | shares	328,100,000		328,100,000
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Income tax benefit related to share-based compensation expense	$ 380	$ 321	$ 1,300	$ 1,100
Total unrecognized compensation cost on RSUs, restricted stock and stock options	9,000		$ 9,000
Total unrecognized compensation cost on RSUs, restricted stock and stock options, weighted-average recognition period			2 years 7 months
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs granted, vesting period			4 years
Number of shares of common stock issued per RSU upon vesting			1
Reduction in number of shares available for grant per share issued with respect to RSUs granted (in shares) | shares			2
Increase in number of shares available for grant per RSU canceled or withheld for tax withholding			2
Fair value of vested RSUs as of vesting date	$ 2,800	$ 2,000	$ 5,400	$ 4,500