Acquisitions (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 27, 2014	Jun. 28, 2013	Jun. 27, 2014	Jun. 28, 2013
Business Acquisition [Line Items]
Acquisition of businesses, net of cash acquired			$ 63	$ 75
Cash balance acquired in the acquisition of a business				3
Acquisition and integration costs	1	1	2	2
NA Installation & Services and ROW Installation & Services segments
Business Acquisition [Line Items]
Acquisition of businesses, net of cash acquired				75
NA Installation & Services
Business Acquisition [Line Items]
Acquisition of businesses, net of cash acquired		37
Westfire, Inc. | NA Installation & Services and ROW Installation & Services segments
Business Acquisition [Line Items]
Consideration transferred	9		67
Acquisition of businesses, net of cash acquired			54
Cash balance acquired in the acquisition of a business			1
Contingent consideration, liability	$ 2		$ 2