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Commitments And Contingencies (Tables)
 9 Months Ended
Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Product Warranty Liability
In millions
 
Balance as of October 1, 2014
$
13

Reductions for payments and costs to satisfy claims
(9
)
Accruals for warranties issued during the period
6

Balance as of June 30, 2015
$
10