Consolidating Condensed Financial Information of Guarantor Subsidiaries - Additional Information (Detail) |
12 Months Ended |
|---|---|
Sep. 30, 2017 | |
| Guarantor Subsidiaries | |
| Condensed Financial Statements, Captions [Line Items] | |
| Collective ownership percentage on guarantor subsidiaries | 100.00% |
| X | ||||||||||
- 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. No definition available.
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| X | ||||||||||
- Definition Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions. No definition available.
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| X | ||||||||||
- Details
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