CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jan. 01, 2016	Jan. 02, 2015	Jan. 01, 2016	Jan. 02, 2015
Income Statement [Abstract]
Revenue	$ 2,986	$ 3,696	$ 5,911	$ 7,481
Cost of revenue	2,245	2,669	4,482	5,403
Product development	304	341	632	683
Marketing and administrative	160	218	341	434
Amortization of intangibles	31	32	65	62
Restructuring and other, net	17	3	76	10
Gain on arbitration award, net		(620)		(620)
Total operating expenses	2,757	2,643	5,596	5,972
Income from operations	229	1,053	315	1,509
Interest income	1	1	2	3
Interest expense	(48)	(50)	(95)	(104)
Other, net	(2)	122	(11)	109
Other (expense) income, net	(49)	73	(104)	8
Income before income taxes	180	1,126	211	1,517
Provision for income taxes	(15)	(193)	(13)	(203)
Net income attributable to Seagate Technology plc	$ 165	$ 933	$ 198	$ 1,314
Net income per share:
Basic (in dollars per share)	$ 0.55	$ 2.84	$ 0.66	$ 4.02
Diluted (in dollars per share)	$ 0.55	$ 2.78	$ 0.65	$ 3.91
Number of shares used in per share calculations:
Basic (in shares)	299	328	301	327
Diluted (in shares)	301	336	304	336
Cash dividends declared per ordinary share	$ 0.63	$ 0.54	$ 1.17	$ 0.97