CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Total		Total [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]
Starting Balance (in shares) at Jun. 27, 2014				327
Total Seagate Technology plc Shareholders' Equity, Starting Balance at Jun. 27, 2014			$ 2,832	$ 0	$ 5,511	$ (2)	$ (2,677)
Increase (Decrease) in Stockholders' Equity
Net income	$ 1,742		1,742				1,742
Other comprehensive loss	(28)		(28)			(28)
Issuance of ordinary shares under employee stock plans			98		98
Issuance of ordinary shares under employee stock plans (in shares)				7
Repurchases of shares	$ (1,087)		(1,087)				(1,087)
Repurchases of shares (in shares)	(19)			(19)
Dividends to shareholders			(664)				(664)
Share-based compensation			137		137
Purchase of additional subsidiary shares from noncontrolling interest			(12)		(12)	0
Ending Balance (in shares) at Jul. 03, 2015				315
Total Seagate Technology plc Shareholders' Equity, Ending Balance at Jul. 03, 2015			3,018	$ 0	5,734	(30)	(2,686)
Increase (Decrease) in Stockholders' Equity
Net income	$ 248		248				248
Other comprehensive loss	$ 5		5			5
Issuance of ordinary shares under employee stock plans			79		79
Issuance of ordinary shares under employee stock plans (in shares)				8
Repurchases of shares			(1,090)				(1,090)
Repurchases of shares (in shares)	(24)	[1]		(23)
Adjustments Related to Tax Withholding for Share-based Compensation	$ (56)		(56)				(56)
Shares Paid for Tax Withholding for Share Based Compensation	(1)			(1)
Dividends to shareholders			(727)				(727)
Share-based compensation			120		120
Purchase of additional subsidiary shares from noncontrolling interest			(4)		(4)	0
Ending Balance (in shares) at Jul. 01, 2016				299
Total Seagate Technology plc Shareholders' Equity, Ending Balance at Jul. 01, 2016	$ 1,593		1,593	$ 0	5,929	(25)	(4,311)
Increase (Decrease) in Stockholders' Equity
Net income	772		772				772
Other comprehensive loss	$ 8		8			8
Issuance of ordinary shares under employee stock plans			86		86
Issuance of ordinary shares under employee stock plans (in shares)				6
Repurchases of shares			(460)				(460)
Repurchases of shares (in shares)	(13)	[1]		(12)
Adjustments Related to Tax Withholding for Share-based Compensation	$ (27)		(27)				(27)
Shares Paid for Tax Withholding for Share Based Compensation	(1)			(1)
Dividends to shareholders			(745)				(745)
Share-based compensation			137		137
Ending Balance (in shares) at Jun. 30, 2017				292
Total Seagate Technology plc Shareholders' Equity, Ending Balance at Jun. 30, 2017	$ 1,364		$ 1,364	$ 0	$ 6,152	$ (17)	$ (4,771)

[1] For fiscal years 2017 and 2016, including net share settlement of $27 million and $56 million, for 1 million and 1 million shares in connection with tax withholding related to vesting of restricted stock units, respectively.