Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
Sep. 30, 2016	Sep. 30, 2015
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 167.0	$ 184.2
Currency translation adjustment	13.1	(17.2)
Goodwill, ending balance	180.1	167.0
Materials
Goodwill [Roll Forward]
Goodwill, beginning balance	150.6	166.0
Currency translation adjustment	12.0	(15.4)
Goodwill, ending balance	162.6	150.6
Delivery Systems and Services
Goodwill [Roll Forward]
Goodwill, beginning balance	16.4	18.2
Currency translation adjustment	1.1	(1.8)
Goodwill, ending balance	$ 17.5	$ 16.4

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975

Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant