Goodwill and Other Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Sep. 28, 2012	Mar. 30, 2012
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill Gross	$ 4,516
Goodwill Accumulated impairment loss	(2,764)
Goodwill Acquired during period and contingent consideration paid	25
Foreign Currency Translation	(9)
Goodwill, Other reclassifications	0
Goodwill Gross	4,532
Goodwill Impaired Accumulated Impairment loss	(2,764)
Goodwill	1,768	1,752
Goodwill, Other reclassifications	0
NPS [Member]
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill Gross	768
Goodwill Accumulated impairment loss	0
Goodwill Acquired during period and contingent consideration paid	25
Foreign Currency Translation	0
Goodwill, Other reclassifications	0
Goodwill Gross	793
Goodwill Impaired Accumulated Impairment loss	0
Goodwill	793	768
Goodwill, Other reclassifications	0
MSS [Member]
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill Gross	2,221
Goodwill Accumulated impairment loss	(2,074)
Goodwill Acquired during period and contingent consideration paid	0
Foreign Currency Translation	(6)
Goodwill, Other reclassifications	(11)
Goodwill Gross	2,204
Goodwill Impaired Accumulated Impairment loss	(2,074)
Goodwill	130	147
Goodwill, Other reclassifications	(11)
BSS [Member]
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill Gross	1,527
Goodwill Accumulated impairment loss	(690)
Goodwill Acquired during period and contingent consideration paid	0
Foreign Currency Translation	(3)
Goodwill, Other reclassifications	11
Goodwill Gross	1,535
Goodwill Impaired Accumulated Impairment loss	(690)
Goodwill	845	837
Goodwill, Other reclassifications	$ 11