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Other Assets (Tables)
 9 Months Ended
Jun. 30, 2020
Other Assets, Noncurrent [Abstract]  
Summary of Other Assets
Other assets are summarized as follows (in millions):
June 30,
2020		September 30,
2019
Investments in non-consolidated joint ventures $105  $110  
Deferred income tax assets, net139  122  
Prepaid pension costs170  149  
Other257  225  
Other assets$671  $606