Goodwill and Other Intangible Assets (Goodwill) (Details) $ in Millions	6 Months Ended
	Oct. 02, 2015 USD ($)
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill, gross	$ 4,433
Accumulated impairment losses	(2,762)
Balance as of April 3, 2015, net	1,671
Additions	185
Deductions	(7)
Foreign currency translation	(7)
Goodwill, gross	4,604
Accumulated impairment losses	(2,762)
Balance as of October 2, 2015, net	1,842
GBS
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill, gross	1,340
Accumulated impairment losses	(701)
Balance as of April 3, 2015, net	639
Additions	105
Deductions	0
Foreign currency translation	(7)
Goodwill, gross	1,438
Accumulated impairment losses	(701)
Balance as of October 2, 2015, net	737
GIS
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill, gross	2,260
Accumulated impairment losses	(2,061)
Balance as of April 3, 2015, net	199
Additions	80
Deductions	0
Foreign currency translation	0
Goodwill, gross	2,340
Accumulated impairment losses	(2,061)
Balance as of October 2, 2015, net	279
NPS
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill, gross	833
Accumulated impairment losses	0
Balance as of April 3, 2015, net	833
Additions	0
Deductions	(7)
Foreign currency translation	0
Goodwill, gross	826
Accumulated impairment losses	0
Balance as of October 2, 2015, net	$ 826