Stockholders' Equity (Schedule of Stock Repurchases) (Details) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended	9 Months Ended
	Jan. 01, 2016 USD ($) $ / shares shares	Jan. 01, 2016 USD ($) $ / shares shares
Equity [Abstract]
Total number of shares repurchased | shares	5.7	17.0
Dollar amount of shares repurchased	$ 118	$ 368
Average price paid per share (in usd per share) | $ / shares	$ 20.68	$ 21.69
Remaining authorization at end of period	$ 1,790	$ 1,790