CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - 6 months ended Jan. 01, 2016 - USD ($) shares in Millions, $ in Millions	Total	Ordinary Shares [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]	Parent [Member]
Total Equity, Beginning balance at Jul. 03, 2015	$ 3,018
Starting Balance (in shares) at Jul. 03, 2015		315
Total Seagate Technology plc Shareholders' Equity, Starting Balance at Jul. 03, 2015		$ 0	$ 5,734	$ (30)	$ (2,686)	$ 3,018
Increase (Decrease) in Stockholders' Equity
Net income	198				198	198
Other comprehensive income (loss)	(2)			(2)		(2)
Issuance of ordinary shares under employee stock plans			41			41
Issuance of ordinary shares under employee stock plans (in shares)		5
Repurchases of ordinary shares	$ (1,144)				(1,090)	(1,090)
Repurchases of ordinary shares (in shares)	(24)	(23)
Adjustments Related to Tax Withholding for Share-based Compensation	$ (54)
Shares Paid for Tax Withholding for Share Based Compensation	(1)
Dividends to shareholders					(351)	(351)
Share-based compensation			65			65
Others			(4)
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests				0		4
Total Equity, Ending balance at Jan. 01, 2016	$ 1,821
Ending Balance (in shares) at Jan. 01, 2016		296
Total Seagate Technology plc Shareholders' Equity, Ending Balance at Jan. 01, 2016		$ 0	$ 5,836	$ (32)	$ (3,983)	$ 1,821