XML 34 R61.htm IDEA: XBRL DOCUMENT v2.4.0.6
Financing Arrangement (Carrying Values Of Liability And Equity Components Of Notes) (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2012
Mar. 31, 2012
Debt Instruments [Abstract]    
Principal amount of Notes $ 633 $ 633
Unamortized discount of the liability component (84) (94)
Net carrying amount of Notes 549 539 [1]
Equity component, net $ 105 $ 105
[1] Derived from audited consolidated financial statements.