Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jun. 29, 2018	Mar. 30, 2018	Dec. 29, 2017	Sep. 29, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 30, 2016	Sep. 30, 2016	Jun. 29, 2018	Jun. 30, 2017	Jul. 01, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 756	$ 61	$ (823)	$ 681	$ 280	$ 248	$ 235	$ (366)	$ 675	$ 397	$ 242
Other comprehensive income (loss), before tax:
Actuarial pension gain (loss)									(2)	39	(73)
Foreign currency translation adjustment									18	(115)	74
Net unrealized gain (loss) on derivative contracts									7	(75)	99
Total other comprehensive income (loss), before tax									23	(151)	100
Income tax benefit (expense) related to items of other comprehensive income (loss), before tax									(4)	(10)	23
Other comprehensive income (loss), net of tax									19	(161)	123
Total comprehensive income									$ 694	$ 236	$ 365