Business Segment Data - Schedule of Reports for Net Sales and Operating Income (Loss) by Each Reporting Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Net sales	$ 1,630,888	$ 1,428,922
Operating income (loss)	131,467	115,783
Connected Car [Member]
Segment Reporting Information [Line Items]
Net sales	755,483
Operating income (loss)	87,219	72,647
Lifestyle Audio [Member]
Segment Reporting Information [Line Items]
Net sales	461,752
Operating income (loss)	47,693	49,073
Professional Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	246,333
Operating income (loss)	25,685	23,265
Connected Services [Member]
Segment Reporting Information [Line Items]
Net sales	167,281
Operating income (loss)	5,191	5,599
Other [Member]
Segment Reporting Information [Line Items]
Net sales	39
Operating income (loss)	(34,321)	(34,801)
Operating Segments [Member] | Connected Car [Member]
Segment Reporting Information [Line Items]
Net sales	755,483	700,116
Operating Segments [Member] | Lifestyle Audio [Member]
Segment Reporting Information [Line Items]
Net sales	462,282	406,476
Operating Segments [Member] | Professional Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	247,106	254,437
Operating Segments [Member] | Connected Services [Member]
Segment Reporting Information [Line Items]
Net sales	173,701	67,649
Operating Segments [Member] | Other [Member]
Segment Reporting Information [Line Items]
Net sales	39	244
Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	(7,723)	$ 0
Eliminations [Member] | Connected Car [Member]
Segment Reporting Information [Line Items]
Net sales	0
Eliminations [Member] | Lifestyle Audio [Member]
Segment Reporting Information [Line Items]
Net sales	(530)
Eliminations [Member] | Professional Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	(773)
Eliminations [Member] | Connected Services [Member]
Segment Reporting Information [Line Items]
Net sales	(6,420)
Eliminations [Member] | Other [Member]
Segment Reporting Information [Line Items]
Net sales	$ 0