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COMMON STOCK REPURCHASES (Details) (USD $)
9 Months Ended 1 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2011
Open Market Repurchases [Member]
Dec. 31, 2010
Open Market Repurchases [Member]
May 31, 2011
May 2011 Accelerated Share Repurchase, Total [Member]
Dec. 31, 2011
May 2011 Accelerated Share Repurchase, Total [Member]
Aug. 31, 2011
August 2011 Accelerated Share Repurchase [Member]
Aug. 19, 2011
August 2011 Accelerated Share Repurchase [Member]
Dec. 31, 2011
May 2011 Accelerated Share Repurchase, Collared [Member]
Dec. 31, 2011
May 2011 Accelerated Share Repurchase, Uncollared [Member]
Equity, Class of Treasury Stock [Line Items]                    
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased 785,081                  
Treasury Stock, Shares, Acquired     2,907,936 2,317,900   2,831,519 1,136,364   1,398,925 1,432,594
Treasury Stock, Value, Acquired, Cost Method     $ 94,100,000 $ 70,200,000         $ 50,000,000 $ 50,000,000
Treasury Stock Acquired, Average Cost Per Share     $ 32.37 $ 30.29         $ 35.74 $ 34.90
Employees Taxes Withheld And Paid For Restricted Stock And Restricted Stock Units 2,457,000 74,000                
Accelerated Share Repurchase Initial Payment         100,000,000   50,000,000      
Closing stock price               $ 30.80    
ASR, Value Allocated to Treasury Stock             35,000,000      
ASR, Value Allocated to Equity Forward Contract             15,000,000      
Accelerated Share Repurchase Percentage Of Shares To Be Repurchased               70.00%    
Treasury Stock, Shares, Retired 5,000,000 4,000,000                
Treasury Stock, Retired, Cost Method, Amount $ 177,100,000 $ 102,400,000