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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) (Investments in employee retirement plans, USD $)
In Millions, unless otherwise specified |
Dec. 31, 2013
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Dec. 31, 2012
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|---|---|---|
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Investments in employee retirement plans
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| Changes in fair value of level 3 investment | ||
| Level 3 investment | $ 94.5 | $ 12.2 |