Royalties And Licenses (Schedule Of Royalty-Related Liabilities) (Details) (USD $) In Millions	Sep. 30, 2011	Mar. 31, 2011
Royalty Related Liabilities [Line Items]
Royalty-related liabilities	$ 228	$ 197
Accrued And Other Current Liabilities [Member]
Royalty Related Liabilities [Line Items]
Royalty-related liabilities	157	136
Other Liabilities [Member]
Royalty Related Liabilities [Line Items]
Royalty-related liabilities	$ 71	$ 61

Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

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-Article 9

-Section 03

-Paragraph 15

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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