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SHAREHOLDER'S EQUITY, STOCK REPURCHASE (DETAILS) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		1 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Feb. 29, 2012 February 2012 Stock Repurchase Program [Member]	Mar. 31, 2012 February 2012 Stock Repurchase Program [Member]	Mar. 31, 2011 February 2012 Stock Repurchase Program [Member]	Jun. 30, 2011 June 2011 Stock Repurchase Program [Member]	Mar. 31, 2012 June 2011 Stock Repurchase Program [Member]	Mar. 31, 2011 June 2011 Stock Repurchase Program [Member]	Jun. 30, 2010 June 2010 Stock Repurchase Program [Member]	Mar. 31, 2012 June 2010 Stock Repurchase Program [Member]	Mar. 31, 2011 June 2010 Stock Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Authorized amount under share repurchase program			$ 50			$ 50			$ 50
Share repurchase activity (in shares)	249,340	434,000		203,000	0		46,340	0		0	434,000
Share repurchase activity	$ 8.8	$ 26.3		$ 7.1	$ 0		$ 1.7	$ 0		$ 0	$ 26.3
Common stock held in treasury retired	4,829,834

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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