Derivative Instruments and Hedging Activities - (Details)	9 Months Ended
Jun. 30, 2018 USD ($) instrument	Jul. 31, 2017 USD ($) derivative
Derivative Instruments
Number of derivative instruments held \| instrument	0
Foreign exchange contracts
Derivative Instruments
Notional Amount	$ 50,200,000
Foreign exchange contracts \| Maximum
Derivative Instruments
Derivative instruments, expiration date	Sep. 30, 2018
Variable-rate tranche \| Interest rate caps \| Sally Holdings, LLC
Derivative Instruments
Notional Amount		$ 550,000,000
Derivative instruments, expiration date	Jun. 30, 2023
Designated Cash Flow Hedges
Number of interest rate caps \| derivative		2

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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- References

No definition available.

+ Details

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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

Date the derivative contract matures, in CCYY-MM-DD format.

+ References

No definition available.

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- Definition

The number of derivative instruments of a particular group held by the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959

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- Definition

Number of interest rate derivative instruments held by the entity at the reporting date.

+ References

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