Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended				6 Months Ended	9 Months Ended
	Jan. 31, 2018	Dec. 29, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 30, 2016	Jun. 30, 2017	Dec. 29, 2017	Dec. 30, 2016
Class of Stock [Line Items]
Dividends declared per common share (in usd per share)		$ 0.075			$ 0.075		$ 0.225	$ 0.225
Stock Repurchase Program
Class of Stock [Line Items]
Remaining authorized repurchase amount		$ 800					$ 800
Common Stock | Accelerated Stock Repurchase Agreement
Class of Stock [Line Items]
Accelerated stock repurchase program, authorized amount				$ 500
Accelerated stock repurchase program, upfront payment				$ 500
Stock repurchased and retired, shares			2.2	14.2		16.4
Accelerated stock repurchase program, average price paid per share						$ 30.51
Subsequent Event | Common Stock
Class of Stock [Line Items]
Dividends declared per common share (in usd per share)	$ 0.075