XML 47 R46.htm IDEA: XBRL DOCUMENT v2.4.0.8
Financial Instruments (Carrying Value And Fair Value Of Convertible Senior Notes) (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2013
Mar. 31, 2013
Financial Instruments    
Convertible Senior Notes, Carrying Value $ 564 $ 559 [1]
0.75% Convertible Senior Notes Due 2016
   
Financial Instruments    
Convertible Senior Notes, Fair Value $ 659 $ 614
[1] Derived from audited consolidated financial statements.