Goodwill And Intangible Assets (Schedule Of Changes In The Carrying Amount Of Goodwill) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Jan. 02, 2015
Goodwill [Roll Forward]
Net balance as of March 28, 2014	$ 5,858	[1]
Additions	11	[2]
Adjustments	(15)	[3]
Net balance as of January 2, 2015	5,854
Consumer Security
Goodwill [Roll Forward]
Net balance as of March 28, 2014	1,233
Additions	0	[2]
Adjustments	(3)	[3]
Net balance as of January 2, 2015	1,230
Enterprise Security
Goodwill [Roll Forward]
Net balance as of March 28, 2014	1,918
Additions	11	[2]
Adjustments	(8)	[3]
Net balance as of January 2, 2015	1,921
Information Management
Goodwill [Roll Forward]
Net balance as of March 28, 2014	2,707
Additions	0	[2]
Adjustments	(4)	[3]
Net balance as of January 2, 2015	$ 2,703

[1] Derived from audited financial statements.

[2] Additions due to an acquired business.

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