Royalties And Licenses (Schedule Of Royalty-Related Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Mar. 31, 2012
Royalty Related Liabilities
Royalty-related liabilities	$ 196	$ 173
Accrued royalties
Royalty Related Liabilities
Royalty-related liabilities	123	98
Other accrued expenses
Royalty Related Liabilities
Royalty-related liabilities	23	23
Other liabilities
Royalty Related Liabilities
Royalty-related liabilities	$ 50	$ 52

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

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

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

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

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