Compensation Expense Related to Stock Options, Stock Appreciation Rights and Restricted Stock Units (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Mar. 28, 2015		Mar. 29, 2014		Mar. 28, 2015		Mar. 29, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options/rights	$ 27	[1]	$ 26	[1]	$ 52	[1]	$ 51	[1]
RSUs	83		86		162		160
Total equity-based compensation expense	110	[2]	112	[2]	214	[2]	211	[2]
Equity-based compensation expense capitalized during the period	$ 14		$ 15		$ 29		$ 29

[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. During the quarter and six months ended March 28, 2015, amortization of previously capitalized equity-based compensation totaled $9 million and $18 million, respectively. During the quarter and six months ended March 29, 2014, amortization of previously capitalized equity-based compensation totaled $14 million and $27 million, respectively.