Quarterly Summary of Operations - Schedule of Quarterly Summary of Operations (Detail) - USD ($) $ / shares in Units, $ 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
Quarterly Financial Data [Abstract]
Net sales	$ 1,678,633	$ 1,464,193	$ 1,583,549	$ 1,428,922	$ 1,444,419	$ 1,404,235	$ 1,328,024	$ 1,171,805	$ 1,182,235	$ 1,061,772	$ 1,055,642	$ 998,193	$ 6,155,297	$ 5,348,483	$ 4,297,842
Gross profit	491,176	418,130	493,166	414,632	390,795	364,773	379,450	321,649	284,885	269,195	271,793	278,247	1,817,104	1,456,667	1,104,120
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 (loss) income 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
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
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