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CASH AND CASH EQUIVALENTS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Significant noncash transactions
Construction costs funded through accounts payable	$ 92.3	$ 59.8
Equity issued for employee stock ownership plan	1.7	2.7
Equity issued for stock-based compensation plans	0	16.0
Equity issued for reinvested dividends	$ 0	$ 3.0

Value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of stock value of such awards forfeited. Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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