Goodwill and Other Intangible Assets (Goodwill) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Oct. 03, 2014
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill Gross	$ 4,431
Accumulated impairment losses	(2,764)
Balance as of March 28, 2014, net	1,667
Additions	31
Foreign currency translation	(14)
Goodwill Gross	4,448
Accumulated impairment losses	(2,764)
Balance as of October 3, 2014, net	1,684
GBS
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill Gross	1,370
Accumulated impairment losses	(690)
Balance as of March 28, 2014, net	680
Additions	0
Foreign currency translation	(13)
Goodwill Gross	1,357
Accumulated impairment losses	(690)
Balance as of October 3, 2014, net	667
GIS
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill Gross	2,273
Accumulated impairment losses	(2,074)
Balance as of March 28, 2014, net	199
Additions	0
Foreign currency translation	(1)
Goodwill Gross	2,272
Accumulated impairment losses	(2,074)
Balance as of October 3, 2014, net	198
NPS
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill Gross	788
Accumulated impairment losses	0
Balance as of March 28, 2014, net	788
Additions	31
Foreign currency translation	0
Goodwill Gross	819
Accumulated impairment losses	0
Balance as of October 3, 2014, net	$ 819