Commitments and Contingencies - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014	Jan. 14, 2008
Commitments And Contingencies Disclosure [Abstract]
Adverse effect on earnings per share resulting from changing sales forecasts				$ 1.00
Gains relating to contingency	$ 2.1		$ 6.1
Costs relating to delayed delivery of product		$ 30.5

Adverse effect on earnings per share resulting from changing sales forecasts.

No definition available.

Name:	har_AdverseEffectOnEarningsPerShareResultingFromChangingSalesForecasts
Namespace Prefix:	har_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant