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COMMITMENTS AND CONTINGENCIES (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Future minimum operating leases [Abstract] |  |  |
2014 | $ 52.8 |  |
2015 | 44.7 |  |
2016 | 39.0 |  |
2017 | 31.1 |  |
2018 | 25.0 |  |
Thereafter | 44.4 |  |
Total operating leases | 237.0 |  |
Future minimum purchase commitments [Abstract] |  |  |
2014 | 79.5 |  |
2015 | 20.9 |  |
2016 | 2.9 |  |
2017 | 0 |  |
2018 | 0 |  |
Thereafter | 0 |  |
Total purchase commitments | 103.3 |  |
Total rent expense charged to operations | 64.2 | 60.5 | 53.8
Length of brine and pipeline purchase agreement with PetroLogistics (in years) | 20 |  |
Fixed annual payment over the life of the contract for the use of the pipeline | 2.0 |  |
Amount of the minimum usage requirement for brine over the first five-year period of the contract | 8.4 |  |
Amount of buy out provision exercisable by Company after first five-year period | 12.0 |  |
Legal action liabilities | 19.3 | 15.2 |
Customer contract settlement | 11.0 |  |
Recovery of legacy legal costs | $ 13.9 |  |

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