Divestitures (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended			3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended				12 Months Ended		12 Months Ended
	Sep. 27, 2013	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011	Jun. 28, 2013 North America Guarding Business	Sep. 28, 2012 FEMSA	Dec. 24, 2010 Atkore	Sep. 27, 2013 Atkore	Sep. 28, 2012 Atkore	Sep. 30, 2011 Atkore	Dec. 22, 2010 Atkore	Sep. 30, 2011 Electrical and Metal Products	Sep. 28, 2012 NA Installation & Services North America Guarding Business	Sep. 27, 2013 2012 Separation Agreement	Sep. 27, 2013 2007 Separation Agreement	Sep. 28, 2012 2007 Separation Agreement	Sep. 30, 2011 2007 Separation Agreement
Divestitures
Loss (gain) on write-down	$ 13
Proceeds from divestiture of businesses					25
Cash divested on sale					2
Total assets to be divested included in prepaid expenses and other current assets													35
Total liabilities to be divested included in accrued and other current liabilities													8
Increase (decrease) to shareholders' equity due to spin-off														1	0	0	13
Net cash proceeds on sale of discontinued operations						1
Pre-tax income (loss) on sale of discontinued operations		0	4	170		(3)
Preferred stock sold as percentage of outstanding capital stock											51.00%
Divestiture of businesses, net of cash divested		17	(5)	709			713
Net gains (loss) on divestiture		(20)	(14)	224			259
Cumulative translation gain on divestiture							33
Working capital adjustment that reduced the gain on disposal										11
Ownership percentage								42.00%
Equity Method Investments								44	92
Company's share in net income (loss) of equity investments		(48)	(26)	(12)				(48)	(26)	(12)
Income tax expense associated with pre-2007 Separation tax liabilities		0	21	0
Reimbursement pursuant to tax sharing agreement			8
Gain (loss) on divestiture less settlement of working capital adjustments												$ 248