Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Dec. 29, 2017	Dec. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (823)	$ 235	$ (142)	$ (131)
Other comprehensive income (loss), before tax:
Actuarial pension gain	0	1	0	6
Foreign currency translation adjustment	6	(186)	2	(169)
Net unrealized gain (loss) on derivative contracts	10	(136)	14	(140)
Net unrealized loss on available-for-sale securities	0	0	(1)	0
Total other comprehensive income (loss), before tax	16	(321)	15	(303)
Income tax benefit (expense) related to items of other comprehensive income (loss), before tax	(3)	9	(3)	3
Other comprehensive income (loss), net of tax	13	(312)	12	(300)
Total comprehensive loss	$ (810)	$ (77)	$ (130)	$ (431)