Goodwill and Other Intangible Assets - Additional Information (Details)	3 Months Ended	6 Months Ended
Mar. 31, 2019 segment	Mar. 31, 2019 segment
Goodwill [Line Items]
Number of reportable segments	3	3
Minimum
Goodwill [Line Items]
Weighted average cost of capital	14.50%	14.50%
Maximum
Goodwill [Line Items]
Weighted average cost of capital	17.50%	17.50%

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

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