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INCOME TAXES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Tax Disclosure [Abstract]
Effective Tax Rate (as a percent)	37.20%	34.50%	36.80%	33.70%
Federal statutory tax rate (as a percent)	35.00%	35.00%	35.00%	35.00%
Decrease in the provision for income taxes resulting from the entity's 2013 rate case settlement agreement			$ (21.5)

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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