Inventories, Net (Tables)

3 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories, net are summarized as follows:

(in millions)	December 31, 2017			September 30, 2017
Finished goods	$	271		$	259
Work in process	364			347
Raw materials, parts and supplies	741			677
Less progress payments	(7		)	(7		)
Total	1,369			1,276
Pre-production engineering costs	1,188			1,175
Inventories, net	$	2,557		$	2,451

Anticipated Annual Amortization Expense for Pre-Production Engineering Costs

Anticipated annual amortization expense for pre-production engineering costs is as follows:

(in millions)	2018		2019		2020		2021		2022		Thereafter
Anticipated amortization expense for pre-production engineering costs	$	90	$	132	$	149	$	147	$	139	$	550