Goodwill And Intangible Assets (Schedule Of Changes In The Carrying Amount Of Goodwill) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Oct. 03, 2014
Goodwill [Roll Forward]
Net balance as of March 28, 2014	$ 5,858	[1]
Additions	11	[2]
Adjustments	(9)	[3]
Net balance as of October 3, 2014	5,860
Consumer Security
Goodwill [Roll Forward]
Net balance as of March 28, 2014	1,233
Additions	0	[2]
Adjustments	(1)	[3]
Net balance as of October 3, 2014	1,232
Enterprise Security
Goodwill [Roll Forward]
Net balance as of March 28, 2014	1,918
Additions	11	[2]
Adjustments	(6)	[3]
Net balance as of October 3, 2014	1,923
Information Management
Goodwill [Roll Forward]
Net balance as of March 28, 2014	2,707
Additions	0	[2]
Adjustments	(2)	[3]
Net balance as of October 3, 2014	$ 2,705

[1] Derived from audited financial statements.

[2] Additions due to an acquired business.

[3] Adjustments made to goodwill reflect foreign currency exchange rate fluctuations.