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Net Property
 9 Months Ended
Jun. 30, 2022
Property, Plant and Equipment [Abstract]  
Net Property Net Property
Net property is summarized as follows (in millions):
June 30,
2022		September 30,
2021
Property at cost:
Land and land improvements$41 $41 
Buildings228 231 
Machinery and equipment1,029 1,051 
Company-owned tooling165 164 
Construction in progress66 63 
Total1,529 1,550 
Less: accumulated depreciation(1,028)(1,033)
Net property$501 $517