Goodwill And Intangible Assets (Schedule Of Goodwill Allocated By Operating Segment) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Dec. 30, 2011
Goodwill [Line Items]
Balance as of April 1, 2011	$ 5,494	[1]
Goodwill impairment	(19)	[2]
Goodwill acquired through business combinations	268	[3]
Goodwill adjustments	(18)	[4]
Balance as of December 30, 2011	5,725
Consumer [Member]
Goodwill [Line Items]
Balance as of April 1, 2011	363
Goodwill adjustments	(13)	[4]
Balance as of December 30, 2011	350
Security And Compliance [Member]
Goodwill [Line Items]
Balance as of April 1, 2011	2,464
Goodwill adjustments	(5)	[4]
Balance as of December 30, 2011	2,459
Storage And Server Management [Member]
Goodwill [Line Items]
Balance as of April 1, 2011	2,648
Goodwill acquired through business combinations	268	[3]
Balance as of December 30, 2011	2,916
Services [Member]
Goodwill [Line Items]
Balance as of April 1, 2011	19
Goodwill impairment	$ (19)	[2]

[1] Derived from audited consolidated financial statements.

[2] Due to the adoption of new authoritative accounting guidance at the beginning of our fiscal year (see Note 1), we were required to perform a goodwill Step 2 impairment test for our Services reporting unit. As a result, we recognized an impairment loss of $19 million which reduced the carrying value of goodwill allocated to the Services reporting segment to zero. The valuation technique used to estimate the implied fair value of the Services reporting unit goodwill relies on Level 3 inputs, including estimated future cash flows or profit streams. This impairment was recorded to beginning Accumulated deficit as a cumulative-effect adjustment upon adoption.

[3] Goodwill acquired through business combinations is related to the acquisition of Clearwell. See Note 3 for further information.

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