FAIR VALUE (Details 5) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Dec. 31, 2012
Carrying value and estimated fair value of financial instruments
Impact on earnings of unrealized gains and losses on Level 3 derivatives	$ 0
Long-term debt	2,223.2	2,245.2
Preferred stock of subsidiary	51.1	51.1
Carrying Amount
Carrying value and estimated fair value of financial instruments
Long-term debt	2,223.2	2,245.2
Preferred stock of subsidiary	51.1	51.1
Total, Fair value
Carrying value and estimated fair value of financial instruments
Long-term debt	2,376.2	2,425.8
Preferred stock of subsidiary	$ 61.7	$ 52.7

The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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- Definition

Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity.

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