CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jul. 01, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 718	$ 553	$ 324
Other comprehensive income (loss):
Foreign currency translation gain (loss), net of income taxes	15	(34)	(69)
Net unrealized gain on hedging derivatives, net of income taxes	1	1	1
Net unrecognized gain (loss) on postretirement obligations, net of income taxes	93	200	(411)
Other comprehensive income (loss), net of income taxes	109	167	(479)
Total comprehensive income (loss)	$ 827	$ 720	$ (155)