Earnings Per Share - Schedule of Calculation of Basic and Diluted Earnings per Share of Common Stock Outstanding (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended												12 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]
Net income	$ 73,642	$ 70,249	$ 116,164	$ 82,934	$ 43,113	$ 73,385	$ 71,629	$ 46,452	$ 5,490	$ 34,873	$ 47,489	$ 54,555	$ 342,989	$ 234,579	$ 142,407
Net income (loss) attributable to noncontrolling interest	465	(46)	(71)	(39)	(113)	0	0	0					309	(113)	0
Net income attributable to Harman International Industries, Incorporated	$ 73,177	$ 70,295	$ 116,235	$ 82,973	$ 43,226	$ 73,385	$ 71,629	$ 46,452					$ 342,680	$ 234,692	$ 142,407
Weighted average shares outstanding													70,147	69,073	68,990
Employee stock options													723	816	746
Total weighted average shares outstanding													70,870	69,889	69,736
Earnings per share, Basic	$ 1.02	$ 1.00	$ 1.67	$ 1.20	$ 0.63	$ 1.06	$ 1.04	$ 0.67	$ 0.08	$ 0.50	$ 0.69	$ 0.79	$ 4.89	$ 3.40	$ 2.06
Earnings per share, Diluted	$ 1.01	$ 0.99	$ 1.65	$ 1.18	$ 0.62	$ 1.05	$ 1.03	$ 0.66	$ 0.08	$ 0.50	$ 0.68	$ 0.79	$ 4.84	$ 3.36	$ 2.04