Compensation Expense Related to Stock Options, Stock Appreciation Rights and Restricted Stock Units (RSUs) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Mar. 30, 2013		Mar. 31, 2012		Mar. 30, 2013		Mar. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options/rights	$ 28	[1]	$ 29	[1]	$ 53	[1]	$ 60	[1]
RSUs	84		84		160		157
Equity Based Compensation	112	[2]	113	[2]	213	[2]	217	[2]
Equity-based compensation expense capitalized during the period	$ 15		$ 15		$ 29		$ 28

[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 30, 2013, amortization of previously capitalized equity-based compensation totaled $13 million and $37 million, respectively. During the quarter and six months ended March 31, 2012, amortization of previously capitalized equity-based compensation totaled $16 million and $24 million, respectively.