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DEBT Debt Retirement (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended
Jul. 28, 2013
Senior Unsecured Convertible Notes, Four Percent, Due June 2013 [Member]
  
Debt Instrument [Line Items]  
Repayments of Long-term Debt $ 400.0
Stock Issued During Period, Shares, Conversion of Convertible Securities 3,894,476
Stock Repurchased and Retired During Period, Shares 3,894,510
Net Shares Retired, Settlement of Convertible Notes 34
Senior Unsecured Notes, Seven Point Seven Five Percent, Due May 2013 [Member]
  
Debt Instrument [Line Items]  
Repayments of Long-term Debt $ 55.0