PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Fair Values of Pension Plan Assets) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	$ 200.5	$ 192.2	$ 186.0
Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	838.7	744.1	734.3
Equity Securities [Member] \| U S Large Cap [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	231.1	191.1
Equity Securities [Member] \| U S Small Mid Cap [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	39.2	29.2
Equity Securities [Member] \| International [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	114.5	90.0
Fixed Income Investments [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	247.5	231.1
Hedge Funds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	85.6	100.7	105.8
Hedge Funds [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	85.6	100.7
Private Equity Funds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	29.3	30.1	25.0
Private Equity Funds [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	29.3	38.7
Structured Finance [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	56.2	44.9	39.7
Structured Finance [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	56.2	44.9
Real Estate [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	29.4	16.5	15.5
Real Estate [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	29.4	16.5
Cash [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	5.9	1.9
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	599.8	551.9
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] \| Equity Securities [Member] \| U S Large Cap [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	231.1	191.1
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] \| Equity Securities [Member] \| U S Small Mid Cap [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	39.2	29.2
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] \| Equity Securities [Member] \| International [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	114.5	90.0
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] \| Fixed Income Investments [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	209.1	231.1
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] \| Hedge Funds [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] \| Private Equity Funds [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	8.6
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] \| Structured Finance [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] \| Real Estate [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] \| Cash [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	5.9	1.9
Significant Other Observable Inputs (Level 2) [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	38.4	0
Significant Other Observable Inputs (Level 2) [Member] \| Equity Securities [Member] \| U S Large Cap [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Equity Securities [Member] \| U S Small Mid Cap [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Equity Securities [Member] \| International [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Fixed Income Investments [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	38.4	0
Significant Other Observable Inputs (Level 2) [Member] \| Hedge Funds [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Private Equity Funds [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Structured Finance [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Real Estate [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Cash [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	200.5	192.2
Significant Unobservable Inputs (Level 3) [Member] \| Equity Securities [Member] \| U S Large Cap [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Equity Securities [Member] \| U S Small Mid Cap [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Equity Securities [Member] \| International [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Fixed Income Investments [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Hedge Funds [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	85.6	100.7
Significant Unobservable Inputs (Level 3) [Member] \| Private Equity Funds [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	29.3	30.1
Significant Unobservable Inputs (Level 3) [Member] \| Structured Finance [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	56.2	44.9
Significant Unobservable Inputs (Level 3) [Member] \| Real Estate [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	29.4	16.5
Significant Unobservable Inputs (Level 3) [Member] \| Cash [Member] \| Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	$ 0	$ 0

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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