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STOCK-BASED COMPENSATION (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended | 0 Months Ended | 9 Months Ended
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Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 Restricted Stock Awards | Sep. 30, 2013 Restricted Stock Units | Sep. 30, 2013 Performance Share Awards item | Sep. 30, 2013 Performance Share Awards Greater than | Sep. 30, 2013 Performance Share Awards Less than or equal to | Sep. 30, 2013 Performance shares based on performance conditions | Sep. 30, 2013 Performance Share Awards Based on Internal Performance Metrics -3 Year Graded Vesting | Sep. 30, 2013 Performance Share Awards Based on Internal Metrics-Three Performance Metrics item | Feb. 21, 2013 Performance shares based on market conditions | Sep. 30, 2013 Performance shares based on market conditions item
Stock-Based Compensation arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense | $ 12.2 | $ 10.4 | $ 41.0 | $ 23.4 |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  | 5,700 |  | 804,500 |  |  | 549,520 | 169,980 | 379,540 |  | 254,980
Granted and fully vested (in shares) |  |  |  |  |  | 49,042 |  |  |  |  |  |  |  |
Granted (in dollars per share) |  |  |  |  | $ 35.56 | $ 27.19 |  |  |  | $ 26.62 |  |  | $ 23.06 |
Annual forfeiture rate assumption (as a percent) |  |  |  |  | 6.00% |  |  | 0.00% | 6.00% |  |  |  |  |
Number of types of performance awards granted to employees |  |  |  |  |  |  | 3 |  |  |  |  |  |  |
Right to receive shares as percentage of award |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |
Number of years over which performance criteria is to be met |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |
Minimum operating cash flow for the year preceding the performance period |  |  |  |  |  |  |  |  |  |  | $ 100 |  |  |
Number of criteria considered for awarding performance shares |  |  |  |  |  |  |  |  |  |  |  | 3 |  |
Vesting rights |  |  |  |  |  |  |  |  |  |  | 25% of the shares vest on each the first and second anniversary dates following the date of grant and 50% of the shares vest on the third anniversary following the date of the grant | An employee will earn one-third of the award granted for each internal performance metric that the Company meets at the end of the performance period. |  |
Number of other companies in the Company's peer group |  |  |  |  |  |  |  |  |  |  |  |  |  | 15
Assumptions: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value per Share, low end of range (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 22.17
Value per Share, high end of range (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 36.98
Stock price volatility (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  | 43.80% |
Risk free rate of return (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  | 0.40% |
Expected dividend yield (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  | 0.20% | 0.10%
Stock Price Volatility, low end of range (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 26.20%
Stock Price Volatility, high end of range (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 42.80%
Risk free rate of return, low end of range (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.00%
Risk free rate of return, high end of range (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.40%

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References No definition available. + Details
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- Definition The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References No definition available. + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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