Acquisition (Schedule of Pro Forma Information) (Details) - Blue Coat, Inc. - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 30, 2016	Jan. 01, 2016	Dec. 30, 2016	Jan. 01, 2016
Business Acquisition [Line Items]
Net revenues	$ 1,041	$ 1,074	$ 3,127	$ 3,152
Net income (loss)	$ 55	$ 57	$ (64)	$ 57