Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended		9 Months Ended
	Jan. 31, 2109	Jan. 31, 2019	Dec. 28, 2018	Dec. 29, 2017	Dec. 28, 2018	Dec. 29, 2017
Class of Stock [Line Items]
Dividends declared per common share (in dollars per share)			$ 0.075	$ 0.075	$ 0.225	$ 0.225
Remaining authorized repurchase amount			$ 800		$ 800
Subsequent Event
Class of Stock [Line Items]
Remaining authorized repurchase amount		$ 1,300
Stock repurchase authorization increase amount		$ 500
Subsequent Event | Common Stock
Class of Stock [Line Items]
Dividends declared per common share (in dollars per share)	$ 0.075