Share-Based Compensation - Schedule of stock-based awards granted (Details)	6 Months Ended
Mar. 31, 2020 shares
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted in period	454,929
Time-based stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards granted in period	315,555
Performance-based stock awards (maximum that can be earned)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards granted in period	423,651

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Net number of share options (or share units) granted during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Details

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- Details

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