XML 32 R42.htm IDEA: XBRL DOCUMENT v2.4.0.6
Financial Instruments (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Mar. 31, 2012
Assets  
Valuation Technique, Foreign currency exchange derivatives A
Liabilities  
Valuation Technique, Foreign currency exchange derivatives A
Recurring [Member]
 
Assets  
Foreign currency forward contracts 8.1
Total 1,011.1
Liabilities  
Foreign currency forward contracts 0.6
Total 0.6
Money-market funds [Member]
 
Assets  
Valuation Technique, Cash equivalents A
Money-market funds [Member] | Recurring [Member]
 
Assets  
Cash equivalents 769.3
U.S. Treasury securities [Member]
 
Assets  
Valuation Technique, Short-term and long-term investments A
U.S. Treasury securities [Member] | Recurring [Member]
 
Assets  
Cash equivalents 49.9
Short-term and long-term investments 92.2
Valuation Technique, Cash equivalents A
Certificates of deposit [Member]
 
Assets  
Valuation Technique, Cash equivalents A
Certificates of deposit [Member] | Recurring [Member]
 
Assets  
Cash equivalents 45.1
Auction Rate Securities [Member]
 
Assets  
Valuation Technique, Short-term and long-term investments B
Auction Rate Securities [Member] | Recurring [Member]
 
Assets  
Short-term and long-term investments 26.9
Mutual funds [Member]
 
Assets  
Valuation Technique, Short-term and long-term investments A
Mutual funds [Member] | Recurring [Member]
 
Assets  
Short-term and long-term investments 19.6
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Recurring [Member]
 
Assets  
Foreign currency forward contracts   
Total 976.1
Liabilities  
Foreign currency forward contracts   
Total   
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Money-market funds [Member] | Recurring [Member]
 
Assets  
Cash equivalents 769.3
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. Treasury securities [Member] | Recurring [Member]
 
Assets  
Cash equivalents 49.9
Short-term and long-term investments 92.2
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Certificates of deposit [Member] | Recurring [Member]
 
Assets  
Cash equivalents 45.1
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Auction Rate Securities [Member] | Recurring [Member]
 
Assets  
Short-term and long-term investments   
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Mutual funds [Member] | Recurring [Member]
 
Assets  
Short-term and long-term investments 19.6
Significant Other Observable Inputs (Level 2) [Member] | Recurring [Member]
 
Assets  
Foreign currency forward contracts 8.1
Total 8.1
Liabilities  
Foreign currency forward contracts 0.6
Total 0.6
Significant Other Observable Inputs (Level 2) [Member] | Money-market funds [Member] | Recurring [Member]
 
Assets  
Cash equivalents   
Significant Other Observable Inputs (Level 2) [Member] | U.S. Treasury securities [Member] | Recurring [Member]
 
Assets  
Cash equivalents   
Short-term and long-term investments   
Significant Other Observable Inputs (Level 2) [Member] | Certificates of deposit [Member] | Recurring [Member]
 
Assets  
Cash equivalents   
Significant Other Observable Inputs (Level 2) [Member] | Auction Rate Securities [Member] | Recurring [Member]
 
Assets  
Short-term and long-term investments   
Significant Other Observable Inputs (Level 2) [Member] | Mutual funds [Member] | Recurring [Member]
 
Assets  
Short-term and long-term investments   
Significant Unobservable Inputs (Level 3) [Member] | Recurring [Member]
 
Assets  
Foreign currency forward contracts   
Total 26.9
Liabilities  
Foreign currency forward contracts   
Total   
Significant Unobservable Inputs (Level 3) [Member] | Money-market funds [Member] | Recurring [Member]
 
Assets  
Cash equivalents   
Significant Unobservable Inputs (Level 3) [Member] | U.S. Treasury securities [Member] | Recurring [Member]
 
Assets  
Cash equivalents   
Short-term and long-term investments   
Significant Unobservable Inputs (Level 3) [Member] | Certificates of deposit [Member] | Recurring [Member]
 
Assets  
Cash equivalents   
Significant Unobservable Inputs (Level 3) [Member] | Auction Rate Securities [Member] | Recurring [Member]
 
Assets  
Short-term and long-term investments 26.9
Significant Unobservable Inputs (Level 3) [Member] | Mutual funds [Member] | Recurring [Member]
 
Assets  
Short-term and long-term investments