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Property, Plant and Equipment (Tables)
9 Months Ended
Jun. 28, 2013
Property, Plant and Equipment [Abstract]  
Schedule of property, plant and equipment
Property, plant and equipment consisted of the following ($ in millions):
 
As of
 
June 28,
2013

 
September 28,
2012

Land
$
42

 
$
44

Buildings
384

 
358

Subscriber systems
2,994

 
3,063

Machinery and equipment
1,201

 
1,158

Construction in progress
80

 
102

Accumulated depreciation
(3,061
)
 
(3,055
)
Property, Plant and Equipment, net
$
1,640

 
$
1,670