Separate Financial Information of Guarantor Subsidiaries - Statement of Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Dec. 28, 2018	Sep. 28, 2018	Dec. 29, 2017	Sep. 29, 2017	Dec. 28, 2018	Dec. 29, 2017
Condensed Statement of Income Captions [Line Items]
Net income (loss)	$ (487)	$ 511	$ (823)	$ 681	$ 24	$ (142)
Actuarial pension gain	1		0		1	0
Foreign currency translation adjustment	31		6		(6)	2
Net unrealized gain on derivative contracts and available-for-sale securities	7		10		6	13
Total other comprehensive income, before tax	39		16		1	15
Income tax benefit (expense) related to items of other comprehensive income, before tax	2		(3)		3	(3)
Other comprehensive income, net of tax	41		13		4	12
Total comprehensive income (loss)	(446)		(810)		28	(130)
Parent
Condensed Statement of Income Captions [Line Items]
Net income (loss)	(487)		(823)		24	(142)
Actuarial pension gain	1				1	0
Foreign currency translation adjustment	31		6		(6)	2
Net unrealized gain on derivative contracts and available-for-sale securities	7		10		6	13
Total other comprehensive income, before tax	39		16		1	15
Income tax benefit (expense) related to items of other comprehensive income, before tax	3		(3)		4	(3)
Other comprehensive income, net of tax	42		13		5	12
Total comprehensive income (loss)	(445)		(810)		29	(130)
Guarantor Subsidiaries
Condensed Statement of Income Captions [Line Items]
Net income (loss)	(422)		(762)		43	43
Actuarial pension gain	1				1	0
Foreign currency translation adjustment	32		5		(2)	1
Net unrealized gain on derivative contracts and available-for-sale securities	30		3		22	5
Total other comprehensive income, before tax	63		8		21	6
Income tax benefit (expense) related to items of other comprehensive income, before tax	(2)		0		(2)	0
Other comprehensive income, net of tax	61		8		19	6
Total comprehensive income (loss)	(361)		(754)		62	49
Non-Guarantor Subsidiaries
Condensed Statement of Income Captions [Line Items]
Net income (loss)	(133)		595		212	1,170
Actuarial pension gain	1				1	0
Foreign currency translation adjustment	32		5		(2)	1
Net unrealized gain on derivative contracts and available-for-sale securities	30		3		20	5
Total other comprehensive income, before tax	63		8		19	6
Income tax benefit (expense) related to items of other comprehensive income, before tax	(2)		1		(1)	(1)
Other comprehensive income, net of tax	61		9		18	5
Total comprehensive income (loss)	(72)		604		230	1,175
Eliminations
Condensed Statement of Income Captions [Line Items]
Net income (loss)	555		167		(255)	(1,213)
Actuarial pension gain	(2)				(2)	0
Foreign currency translation adjustment	(64)		(10)		4	(2)
Net unrealized gain on derivative contracts and available-for-sale securities	(60)		(6)		(42)	(10)
Total other comprehensive income, before tax	(126)		(16)		(40)	(12)
Income tax benefit (expense) related to items of other comprehensive income, before tax	3		(1)		2	1
Other comprehensive income, net of tax	(123)		(17)		(38)	(11)
Total comprehensive income (loss)	$ 432		$ 150		$ (293)	$ (1,224)