COMMON STOCK REPURCHASES (Details) (USD $)	3 Months Ended						3 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	May 23, 2011	May 09, 2011	May 03, 2011 Range [Domain]	Mar. 01, 2011 Range [Domain]	Jun. 30, 2011 Minimum [Member]
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Shares, Acquired	270,000
Stock Repurchase Program, Number of Shares Authorized to be Repurchased						1,000,000
Treasury Stock, Value, Acquired, Cost Method	$ 9,500,000
Treasury Stock Acquired, Average Cost Per Share	$ 35.34
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	390,900
Employees' Taxes Withheld And Paid For Restricted Stock And Restricted Stock Units	705,000	0
Stock Repurchase Program, Number of Shares Authorized to be Repurchased, May 2011					7,000,000
Accelerated Share Repurchase Initial Payment	100,000,000
Number of Shares Received, Accelerated Share Repurchase Program Total	2,183,014
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased Under May 3, 2011 Authorization	4,816,986
Accelerated Share Repurchase Initial Payment, Collared	50,000,000
Initial Shares Received, Accelerated Share Repurchase, Collared	867,690
Closing stock price			$ 35.16	$ 37.56
Minimum Number of Shares, Accelerated Share Repurchase, Collared							1,228,555
Maximum Number of Shares, Accelerated Share Repurchase, Collared	1,501,567
Treasury Stock, Value, Collared ASR	45,300,000
Equity forward contract, Collared ASR	4,700,000
Additional Shares Delivered, Accelerated Share Repurchase, Collared	360,865
Accelerated Share Repurchase Initial Payment, Uncollared	50,000,000
Initial Shares Received, Accelerated Share Repurchase, Uncollared	954,459
Uncollared Accelerated Share Repurchase Percentage Of Shares To Be Repurchased	72.00%
Treasury Stock, Value, Uncollared ASR	35,800,000
Equity forward contract, Uncollared ASR	$ 14,200,000