Goodwill and Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended
	Jun. 27, 2014	Sep. 27, 2013	Sep. 28, 2012
Changes in the carrying amount of goodwill, by segment ($ in millions):
Goodwill balance at beginning of period	$ 4,162	$ 4,034
Impairments	(1,761)	(1,761)	(1,761)
Acquisitions/Purchase accounting adjustments	28	156
Transfers		0
Currency translation	22	(28)
Goodwill balance at end of period	4,212	4,162
Gross Goodwill
Changes in the carrying amount of goodwill, by segment ($ in millions):
Goodwill balance at beginning of period			5,795
Goodwill balance at end of period	5,973	5,923	5,795
NA Installation & Services
Changes in the carrying amount of goodwill, by segment ($ in millions):
Goodwill balance at beginning of period	1,978	2,001
Impairments	(126)	(126)	(126)
Acquisitions/Purchase accounting adjustments	9	24
Transfers		(39)
Currency translation	(6)	(8)
Goodwill balance at end of period	1,981	1,978
NA Installation & Services | Gross Goodwill
Changes in the carrying amount of goodwill, by segment ($ in millions):
Goodwill balance at beginning of period			2,127
Goodwill balance at end of period	2,107	2,104	2,127
ROW Installation & Services
Changes in the carrying amount of goodwill, by segment ($ in millions):
Goodwill balance at beginning of period	927	904
Impairments	(1,068)	(1,068)	(1,068)
Acquisitions/Purchase accounting adjustments	17	42
Transfers		0
Currency translation	28	(19)
Goodwill balance at end of period	972	927
ROW Installation & Services | Gross Goodwill
Changes in the carrying amount of goodwill, by segment ($ in millions):
Goodwill balance at beginning of period			1,972
Goodwill balance at end of period	2,040	1,995	1,972
Global Products
Changes in the carrying amount of goodwill, by segment ($ in millions):
Goodwill balance at beginning of period	1,257	1,129
Impairments	(567)	(567)	(567)
Acquisitions/Purchase accounting adjustments	2	90
Transfers		39
Currency translation	0	(1)
Goodwill balance at end of period	1,259	1,257
Global Products | Gross Goodwill
Changes in the carrying amount of goodwill, by segment ($ in millions):
Goodwill balance at beginning of period			1,696
Goodwill balance at end of period	$ 1,826	$ 1,824	$ 1,696