Equity-Based Compensation - Impact of Stock Options/Rights and Restricted Stock Units on Income and Cash Flows (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 27, 2014		Sep. 28, 2013		Sep. 29, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock option/rights compensation expense	$ 102	[1]	$ 101	[1]	$ 115	[1]
RSU compensation expense	312		311		310
Total equity-based compensation expense	414	[2]	412	[2]	425	[2]
Tax impact	(139)		(139)		(145)
Reduction in net income	275		273		280
Equity-based compensation expense capitalized during the period	49		58		56
Tax benefit reported in cash flow from financing activities	$ 255		$ 204		$ 122

[1] Includes stock appreciation rights.

[2] Equity-based compensation expense is net of capitalized equity-based compensation and excludes amortization of previously capitalized equity-based compensation costs. Amortization of previously capitalized equity-based compensation totaled $68 million, $65 million and $59 million in fiscal years 2014, 2013 and 2012, respectively.