Separate Financial Information of Guarantor Subsidiaries Comprehensive Income (Loss) (Details) - 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
Condensed Statement of Income Captions [Line Items]
Net income (loss)	$ 756	$ 61	$ (823)	$ 681	$ 280	$ 248	$ 235	$ (366)	$ 675	$ 397	$ 242
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
Parent
Condensed Statement of Income Captions [Line Items]
Net income (loss)									675	397	242
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
Guarantor Subsidiaries
Condensed Statement of Income Captions [Line Items]
Net income (loss)									1,552	1,047	317
Actuarial pension gain (loss)									(2)	39	(73)
Foreign currency translation adjustment									15	(113)	74
Net unrealized gain (loss) on derivative contracts									(10)	(75)	99
Total other comprehensive income (loss), before tax									3	(149)	100
Income tax benefit (expense) related to items of other comprehensive income (loss), before tax									1	(10)	23
Other comprehensive income (loss), net of tax									4	(159)	123
Total comprehensive income									1,556	888	440
Non-Guarantor Subsidiaries
Condensed Statement of Income Captions [Line Items]
Net income (loss)									2,246	261	396
Actuarial pension gain (loss)									(2)	39	(73)
Foreign currency translation adjustment									15	(136)	74
Net unrealized gain (loss) on derivative contracts									(6)	(73)	93
Total other comprehensive income (loss), before tax									7	(170)	94
Income tax benefit (expense) related to items of other comprehensive income (loss), before tax									(1)	(8)	23
Other comprehensive income (loss), net of tax									6	(178)	117
Total comprehensive income									2,252	83	513
Eliminations
Condensed Statement of Income Captions [Line Items]
Net income (loss)									(3,798)	(1,308)	(713)
Actuarial pension gain (loss)									4	(78)	146
Foreign currency translation adjustment									(30)	249	(148)
Net unrealized gain (loss) on derivative contracts									16	148	(192)
Total other comprehensive income (loss), before tax									(10)	319	(194)
Income tax benefit (expense) related to items of other comprehensive income (loss), before tax									0	18	(46)
Other comprehensive income (loss), net of tax									(10)	337	(240)
Total comprehensive income									$ (3,808)	$ (971)	$ (953)