COMMITMENTS AND CONTINGENCIES (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Future minimum operating leases [Abstract]
2013	$ 54.7
2014	46.6
2015	40.3
2016	32.5
2017	28.0
Thereafter	66.8
Total operating leases	268.9
Future minimum purchase commitments [Abstract]
2013	77.1
2014	19.1
2015	16.7
2016	0.4
2017	0
Thereafter	0
Total purchase commitments	113.3
Total rent expense charged to operations	60.5	53.8	51.2
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	$ 15.2	$ 16.4