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CASH AND CASH EQUIVALENTS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Supplemental disclosure of statements of cash flows
Cash paid for interest	$ 4.8	$ 8.9
Cash received for income taxes	(1.0)	(33.2)
Decrease in cash received for income taxes	32.2
Significant noncash transactions
Construction costs funded through accounts payable	59.8	50.2
Equity issued for stock-based compensation plans	18.7
Equity issued for reinvested dividends	3.0
Risk management asset related to sale of Beaver Falls and Syracuse	$ 6.8

The fair value of assets acquired in noncash investing or financing activities.

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- Definition

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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- Definition

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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