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COMPREHENSIVE INCOME (DETAILS) (USD $) In Millions	3 Months Ended		6 Months Ended
COMPREHENSIVE INCOME (DETAILS) (USD $) In Millions	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Other Comprehensive Income Loss Net Of Tax Period Increase Decrease Abstract
Total Comprehensive Income (Loss)	$ 7.4	$ 36.9	$ 27.0	$ 72.9
Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Arising During Period Net Of Tax	$ 21.4		$ 21.4

The cost of benefit improvement resulting from a plan amendment that occurred during the period, after tax. The cost has not been recognized in net periodic benefit cost pursuant to FAS 87 and 106. A plan amendment includes provisions that grant increased benefits based on services rendered in prior periods.

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