The amount of accrued medical and workers compensation claims.

No definition available.

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- Definition

The aggregate annual amount at which stop-loss coverage begins on workers compensation claims.

+ References

No definition available.

+ Details

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

- Definition

The total expense for all benefit plans combined including all general and discretionary bonuses but excluding standard health and life insurance programs and ESPP expense.

+ References

No definition available.

+ Details

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

- Details

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

- Definition

Represents the amount expenses incurred of deferred compensation plan for non-employee directors.

+ References

No definition available.

+ Details

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

- Definition

Employee Stock Purchase Plan amount of shares available for future issuance.

+ References

No definition available.

+ Details

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

- Definition

Vesting period for 401(k) matching contributions.

+ References

No definition available.

+ Details

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

- Definition

Represents the number of operative employee benefit plans maintained by the entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	hw_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of incentive compensation plans (ICP) maintained by the entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	hw_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of cash compensation that employees can have deducted from their pay for purchase of stock through the Employee Stock Purchase Plan.

+ References

No definition available.

+ Details

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

- Definition

Percentage of employee base compensation up to which they are allowed to make tax-deferred contributions into the DCP.

+ References

No definition available.

+ Details

Name:	hw_PercentageOfTaxDeferredContributions
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of employee incentive compensation up to which they are allowed to make tax-deferred contributions into the DCP.

+ References

No definition available.

+ Details

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

- Definition

The amount per individual per year in excess of which stop-loss coverage begins on self-insured medical insurance plans.

+ References

No definition available.

+ Details

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

- Definition

The amount per occurrence over which stop-loss coverage begins on workers compensation claims.

+ References

No definition available.

+ Details

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

- Definition

Aggregate number of common shares reserved for future issuance.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 65

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Purchase price of common stock expressed as a percentage of its fair market value.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Commitments and Contingencies (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2012 item	Sep. 30, 2011	Sep. 30, 2010
Commitments and Contingencies
Number of employee benefit plans	5
Benefit plan expenses, net	$ 31.3	$ 5.7	$ 11.5
Percentage of compensation as tax-deferred contributions	50.00%
Vesting period for matching contributions	3 years
Percentage of tax deferred contributions of incentive compensation	100.00%
Percentage of tax-deferred contributions of base compensation	50.00%
Number of ICP plans	2
Expenses incurred under DDCP	0.5
Employee Share Purchase Plan
Commitments and Contingencies
Shares held in reserve for issuance	4.3
ESPP shares available for future issuance	2.5
Percentage of cost per share of the fair market value at the end of each quarterly offering period	85.00%
Maximum \| Employee Share Purchase Plan
Commitments and Contingencies
Percentage of cash compensation	10.00%
Minimum \| Employee Share Purchase Plan
Commitments and Contingencies
Percentage of cash compensation	1.00%
Self Insurance
Commitments and Contingencies
Stop-loss coverage per individual per year	0.2
Stop-loss coverage per occurrence	0.25
Annual aggregate stop-loss coverage	6.3
Accrued medical and workers compensation claims	$ 5.9