Divestitures and Assets and Liabilities Held For Sale (Income (Loss) From Discontinued Operations) (Details) - Information Management - Discontinued Operations, Disposed of by Sale - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 29, 2017	Sep. 30, 2016	Sep. 29, 2017	Sep. 30, 2016
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Net revenues	$ 18	$ 51	$ 37	$ 123
Cost of revenues	(14)	(6)	(16)	(9)
Operating expenses	0	0	(2)	(24)
Gain (loss) on sale of Veritas	(4)	0	(1)	38
Other expense, net	0	(2)	0	0
Income from discontinued operations before income taxes	0	43	18	128
Income tax expense (benefit)	(4)	118	37	134
Income (loss) from discontinued operations, net of income taxes	$ 4	$ (75)	$ (19)	$ (6)