Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	6 Months Ended		12 Months Ended
	Oct. 04, 2019	Sep. 28, 2018	Mar. 29, 2019	Aug. 06, 2019
Class of Stock [Line Items]
Repurchases of common stock	$ 559	$ 0
Remaining authorized repurchase amount				$ 1,600
Common Stock
Class of Stock [Line Items]
Stock repurchased and settled during the period (in shares)	25
Repurchases of common stock	$ 541
Stock repurchased average price per share (in dollars per share)	$ 21.85
Repurchases of common stock (in shares)			1
Remaining authorized repurchase amount	$ 1,600