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OTHER ASSETS, NET (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Other assets, net of accumulated amortization    
Advances for long-term purchase contracts, net $ 16.8 $ 19.4
Advances to and investment in joint ventures 20.2 6.1
Deferred financing costs, net 30.7 16.3
Long-term assets held for sale 11.1 13.8
Other 8.0 8.0
Total other assets, net $ 86.8 $ 63.6