Aggregate salary commitment under all employment agreements assuming no agreements are renewed.

No definition available.

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- Definition

Aggregate value of severance payments and excess of market value of stock-based awards.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the aggregate value of severance payments and excess of market value of stock-based awards expensed and accrued during the period.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the amount accrued for awards.

+ References

No definition available.

+ Details

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Namespace Prefix:	hw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the amount of aggregate termination benefits.

+ References

No definition available.

+ Details

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Namespace Prefix:	hw_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the amount of termination benefits expensed and accrued during the period.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the measurement period in days where the SARs vest if the stock price exceeds a minimum percentage of the stock price on the grant date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
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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

Compensation arrangements original term of employment agreements, maximum.

+ References

No definition available.

+ Details

Name:	hw_CompensationArrangementsTermOfEmploymentAgreementsMaximum
Namespace Prefix:	hw_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Employee agreement terms.

+ References

No definition available.

+ Details

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Namespace Prefix:	hw_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the expense recorded for performance unit awards granted during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	hw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the stock price as of the grant date.

+ References

No definition available.

+ Details

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Namespace Prefix:	hw_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the grants approved by the committee to Employees for cash settled stock appreciation rights.

+ References

No definition available.

+ Details

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Namespace Prefix:	hw_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the grants approved by the committee to Employees for cash settled stock appreciation rights that remain outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	hw_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of CEO salary.

+ References

No definition available.

+ Details

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Namespace Prefix:	hw_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of performance unit awards vested.

+ References

No definition available.

+ Details

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Namespace Prefix:	hw_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents potential further adjustment period subsequent to year of grant or performance period.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Carrying value as of the balance sheet date of obligations incurred and payable for incentive compensation awarded to employees and directors or earned by them based on the terms of one or more relevant arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.15(5))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.15(a))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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- Details

Name:	us-gaap_RestructuringCostAndReserveAxis=hw_ExecutiveChangeInControlAgreementsMember
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- Details

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Commitments and Contingencies (Details 3) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	2 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Employment Agreements
Commitments and Contingencies
Compensation arrangements original term of employment agreements, maximum			3 years
Employee agreement terms			1 year
Percentage of CEO salary			72.50%
Aggregate salary commitment for salaries and other obligations under all employment agreements assuming no agreements are renewed			$ 3.3
Aggregate termination benefits			10.3
Termination benefits expensed and accrued			4.0
Executive Change in Control Agreements
Commitments and Contingencies
Aggregate value of severance payments and excess of market value of stock-based awards			25.6
Aggregate value of severance payments and excess of market value of stock-based awards expensed and accrued			$ 10.8
Cash Performance Unit Awards 2013 Grants
Commitments and Contingencies
Percentage of performance units vested			50.00%	50.00%
Average stock price period	60 days	60 days
Amount recorded for performance unit award grants					$ 4.7
Cash Performance Unit Awards 2014 and 2015 Grants
Commitments and Contingencies
Amount recorded for performance unit award grants			$ 8.6	$ 5.1
Performance awards which remain accrued and unpaid			$ 15.7
Potential further adjustment period			2 years
Stock Appreciation Rights (SARs)
Commitments and Contingencies
Compensation expense			$ 3.1	$ 4.6	$ 4.6
Stock Appreciation Rights (SARs), 2011 Awards
Commitments and Contingencies
Grants approved by committee to employees for cash settled stock appreciation rights (in shares)							0.4
Grants approved by committee to employees for cash settled stock appreciation rights that remain outstanding (in shares)			0.0
Stock Appreciation Rights (SARS), 2012 Awards
Commitments and Contingencies
Grants approved by committee to employees for cash settled stock appreciation rights (in shares)						1.0
Grants approved by committee to employees for cash settled stock appreciation rights that remain outstanding (in shares)			0.1
Amount accrued for awards			$ 1.6
Grant-date stock price (in dollars per share)			$ 1.85