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