Related Party Balances And Transactions	12 Months Ended
Related Party Balances And Transactions	Mar. 31, 2012
Related Party Balances And Transactions [Abstract]
Related Party Balances And Transactions	21. Related Party Balances and Transactions Notes receivable outstanding from certain of our current and former officers totaled $15 million at March 31, 2012 and 2011. These notes related to purchases of common stock under our various employee stock purchase plans. The notes bear interest at rates ranging from 4.7% to 7.1% and were due at various dates through February 2004. Interest income on these notes is recognized only to the extent that cash is received. These notes, which are included in other capital in the consolidated balance sheets, were issued for amounts equal to the market value of the stock on the date of the purchase and are at full recourse to the borrower. At March 31, 2012, the value of the underlying stock collateral was $15 million. The collectability of these notes is evaluated on an ongoing basis. At March 31, 2012 and 2011, we provided a reserve of nil and approximately $1 million for the outstanding notes. We incurred $10 million in 2012 and $11 million in 2011 and 2010 of annual rental expense paid to an equity-held investment.

The entire disclosure for related party transactions, including the nature of the relationship(s), a description of the transactions, the amount of the transactions, the effects of any change in the method of establishing the terms of the transaction from the previous period, stated interest rate, expiration date, terms and manner of settlement per the agreement with the related party, and amounts due to or from related parties. If the entity and one or more other entities are under common ownership or management control and this control affects the operating results or financial position, disclosure includes the nature of the control relationship even if there are no transactions between the entities. Disclosure may also include the aggregate amount of current and deferred tax expense for each statement of earnings presented where the entity is a member of a group that files a consolidated tax return, the amount of any tax related balances due to or from affiliates as of the date of each statement of financial position presented, the principal provisions of the method by which the consolidated amount of current and deferred tax expense is allocated to the members of the group and the nature and effect of any changes in that method. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

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