Restructuring Program - Rollforward of Restructuring Accrual (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Beginning liability			$ 84,419us-gaap_RestructuringReserve	$ 58,425us-gaap_RestructuringReserve
Expense	25,014us-gaap_RestructuringCosts	4,934us-gaap_RestructuringCosts	31,940us-gaap_RestructuringCosts	28,969us-gaap_RestructuringCosts
Accumulated depreciation offset			(2,785)	(3,455)
Payments			(29,512)us-gaap_PaymentsForRestructuring	(25,772)us-gaap_PaymentsForRestructuring
Foreign currency translation			(8,336)	2,672
Closing liability	75,726us-gaap_RestructuringReserve	60,839us-gaap_RestructuringReserve	75,726us-gaap_RestructuringReserve	60,839us-gaap_RestructuringReserve
Severance Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning liability			54,157	23,563
Expense			27,911	18,353
Accumulated depreciation offset			0	0
Payments			(11,516)	(16,079)
Foreign currency translation			(6,388)	1,174
Closing liability	64,164	27,011	64,164	27,011
Third Party Contractor Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning liability			0	1,014
Expense			36	4,286
Accumulated depreciation offset			0	0
Payments			0	(4,828)
Foreign currency translation			0	50
Closing liability	36	522	36	522
Facility Closure and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning liability			30,262	33,848
Expense			1,208	2,875
Accumulated depreciation offset			0	0
Payments			(17,996)	(4,865)
Foreign currency translation			(1,948)	1,448
Closing liability	11,526	33,306	11,526	33,306
Asset Impairments [Member]
Restructuring Cost and Reserve [Line Items]
Beginning liability			0	0
Expense			2,785	3,455
Accumulated depreciation offset			(2,785)	(3,455)
Payments			0	0
Foreign currency translation			0	0
Closing liability	$ 0	$ 0	$ 0	$ 0

Restructuring, accumulated depreciation offset.

No definition available.

Name:	har_RestructuringAccumulatedDepreciationOffset
Namespace Prefix:	har_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

+ Details

Name:	us-gaap_PaymentsForRestructuring
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_RestructuringCostAndReserveLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

+ Details

Name:	us-gaap_RestructuringCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 5.P.4(b))

-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 3, 4

+ Details

Name:	us-gaap_RestructuringReserve
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of foreign currency translation adjustment increasing or decreasing the accrual for a specified type of restructuring cost.

+ References

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 3, 4

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 5.P.4(b)(2))

-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)(2)

-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

+ Details

Name:	us-gaap_RestructuringReserveTranslationAdjustment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_RestructuringCostAndReserveAxis=us-gaap_AssetImpairmentForRegulatoryActionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RestructuringCostAndReserveAxis=us-gaap_ContractTerminationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RestructuringCostAndReserveAxis=us-gaap_EmployeeSeveranceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RestructuringCostAndReserveAxis=us-gaap_FacilityClosingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: