Goodwill and Intangible Assets - Goodwill Impairment Test (Details)	9 Months Ended
Jun. 30, 2017 item
Goodwill and Intangible Assets Disclosure [Abstract]
Number of reporting units	5
Number of reporting units for which qualitative assessment was conducted	3
Number of reporting units for which quantitative assessment was conducted	2

Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Reporting Unit
-URI http://asc.fasb.org/extlink&oid=6523643

Name:	us-gaap_NumberOfReportingUnits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration