Basis of Presentation and Summary of Significant Accounting Policies (Details)	3 Months Ended
	Dec. 28, 2012 segment week	Sep. 28, 2012 week	Sep. 30, 2011 week
Basis of Presentation
Number of reporting segments	3
Number of weeks in fiscal year	52	52	53
ADT
Basis of Presentation
Number of common shares received under spin-off transaction	0.50
Pentair
Basis of Presentation
Number of common shares received under spin-off transaction	0.24