Earnings Per Share - Schedule of Calculation of Basic and Diluted Earnings per Share of Common Stock Outstanding (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share Basic And Diluted [Line Items]
Net income	$ 116,164	$ 71,629	$ 199,098	$ 118,081
Net loss attributable to noncontrolling interest	(71)	0	(110)	0
Net income attributable to Harman International Industries, Incorporated	116,235	71,629	199,208	118,081
Weighted average shares outstanding	69,432	68,715	69,367	69,131
Weighted average shares outstanding	69,432	68,715	69,367	69,131
Total weighted average shares outstanding	69,432	68,715	69,367	69,131
Total weighted average shares outstanding	70,258	69,578	70,202	69,947
Earnings per share	$ 1.67	$ 1.04	$ 2.87	$ 1.71
Earnings per share	$ 1.65	$ 1.03	$ 2.84	$ 1.69
Basic [Member]
Earnings Per Share Basic And Diluted [Line Items]
Net income	116,164	71,629	199,098	118,081
Net loss attributable to noncontrolling interest	(71)	0	(110)	0
Net income attributable to Harman International Industries, Incorporated	116,235	71,629	199,208	118,081
Weighted average shares outstanding	69,432	68,715	69,367	69,131
Weighted average shares outstanding	69,432	68,715	69,367	69,131
Employee stock options	0	0	0	0
Employee stock options	0	0	0	0
Total weighted average shares outstanding	69,432	68,715	69,367	69,131
Earnings per share	$ 1.67	$ 1.04	$ 2.87	$ 1.71
Diluted [Member]
Earnings Per Share Basic And Diluted [Line Items]
Net income	116,164	71,629	199,098	118,081
Net loss attributable to noncontrolling interest	(71)	0	(110)	0
Net income attributable to Harman International Industries, Incorporated	$ 116,235	$ 71,629	$ 199,208	$ 118,081
Weighted average shares outstanding	69,432	68,715	69,367	69,131
Weighted average shares outstanding	69,432	68,715	69,367	69,131
Employee stock options	826	863	835	816
Employee stock options	826	863	835	816
Total weighted average shares outstanding	69,432	68,715	69,367	69,131
Total weighted average shares outstanding	70,258	69,578	70,202	69,947
Earnings per share	$ 1.65	$ 1.03	$ 2.84	$ 1.69