Segment Information (Narrative) (Details)	3 Months Ended		6 Months Ended
	Sep. 29, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 29, 2017 USD ($) segment	Sep. 30, 2016 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment			2
Segment Reporting Information [Line Items]
Net revenues	$ 1,240,000,000	$ 979,000,000	$ 2,415,000,000	$ 1,863,000,000
Intersegment Eliminations
Segment Reporting Information [Line Items]
Net revenues	$ 0	$ 0	$ 0	$ 0