Inventories, Net (Tables)
 6 Months Ended
Mar. 31, 2016
Inventory Disclosure [Abstract]  
Schedule of Inventories
Inventories, net are summarized as follows:
(in millions)
March 31,
2016
 
September 30,
2015
Finished goods
$
248

 
$
216

Work in process
257

 
250

Raw materials, parts and supplies
387

 
353

Less progress payments
(10
)
 
(7
)
Total
882

 
812

Pre-production engineering costs
1,086

 
1,012

Inventories, net
$
1,968

 
$
1,824
Schedule of Pre-Production Engineering Expected Amortization
Anticipated annual amortization expense for pre-production engineering costs is as follows:
(in millions)
2016
 
2017
 
2018
 
2019
 
2020
 
Thereafter
Anticipated amortization expense for pre-production engineering costs (1)
$
53

 
$
77

 
$
114

 
$
135

 
$
144

 
$
559

 [1]
[1] On October 29, 2015, Bombardier announced the cancellation of the Learjet 85 program. Pre-production engineering costs associated with the Learjet 85 program have been excluded from anticipated amortization expense, as these costs are expected to be recovered through consideration received from Bombardier pursuant to contractual guarantees and not amortized against future hardware deliveries.