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Property, Plant and Equipment (Tables)
12 Months Ended
Sep. 30, 2018
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, plant and equipment consisted of the following (in millions):
 
September 30,
 
2018
 
2017
 
 
 
 
Buildings and improvements
$
2,537

 
$
2,445

Subscriber systems
573

 
571

Machinery and equipment
6,049

 
5,572

Construction in progress
1,324

 
1,252

Land
363

 
373

Total property, plant and equipment
10,846

 
10,213

Less: accumulated depreciation
(4,675
)
 
(4,092
)
Property, plant and equipment - net
$
6,171

 
$
6,121