Business Segment Data - Schedule of Reports for Net Sales and Operating Income (Loss) by Each Reporting Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Net sales	$ 1,628,082	$ 1,464,193	$ 5,031,127	$ 4,476,664
Operating income (loss)	135,353	91,507	425,973	356,047
Connected Car [Member]
Segment Reporting Information [Line Items]
Net sales	766,757		2,259,209
Lifestyle Audio [Member]
Segment Reporting Information [Line Items]
Net sales	472,234		1,558,408
Professional Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	231,551		726,159
Connected Services [Member]
Segment Reporting Information [Line Items]
Net sales	157,540		487,312
Other [Member]
Segment Reporting Information [Line Items]
Net sales			39
Operating Segments [Member] | Connected Car [Member]
Segment Reporting Information [Line Items]
Net sales	766,757	730,216	2,259,209	2,152,793
Operating income (loss)	95,617	73,661	267,102	223,007
Operating Segments [Member] | Lifestyle Audio [Member]
Segment Reporting Information [Line Items]
Net sales	472,781	424,482	1,560,210	1,349,922
Operating income (loss)	60,574	44,626	191,283	148,475
Operating Segments [Member] | Professional Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	232,016	242,329	727,993	764,124
Operating income (loss)	2,667	16,043	52,304	75,128
Operating Segments [Member] | Connected Services [Member]
Segment Reporting Information [Line Items]
Net sales	166,015	67,166	509,441	208,370
Operating income (loss)	11,799	6,303	21,857	26,912
Operating Segments [Member] | Other [Member]
Segment Reporting Information [Line Items]
Net sales			39	1,455
Operating income (loss)	(35,304)	$ (49,126)	(106,573)	$ (117,475)
Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	(9,487)		(25,765)
Eliminations [Member] | Lifestyle Audio [Member]
Segment Reporting Information [Line Items]
Net sales	(547)		(1,802)
Eliminations [Member] | Professional Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	(465)		(1,834)
Eliminations [Member] | Connected Services [Member]
Segment Reporting Information [Line Items]
Net sales	$ (8,475)		$ (22,129)