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Assets Held for Sale (Details) (USD $)
In Millions
9 Months Ended0 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Oct. 16, 2011
Agreement To Sell Ownership Interests in Crystal Holding L.L.C. [Member]
Sep. 30, 2011
Crystal Holding L.L.C. [Member]
Sep. 30, 2010
Crystal Holding L.L.C. [Member]
Subsequent Event [Line Items]     
Subsequent event, amount  $ 550  
Assets held for sale:     
Current assets   9.5 
Property, plant and equipment, net   374.8[1] 
Intangible assets, net   41.2 
Goodwill   14.8 
Other assets   14.8[2] 
Total assets held for sale (presented as a component of our current assets)   455.1 
Liabilities related to assets held for sale:     
Current liabilities   14.7 
Long-term debt   57.2 
Other long-term liabilities   0.3 
Total liabilities related to assets held for sale (presented as a component of our current liabilities)   72.2 
Depreciation and amortization expense$ 739.2$ 709.1 $ 19.6$ 23.1
[1]Includes $31.7 million of surplus material unrelated to Crystal.
[2]Represents pipeline linefill held for sale unrelated to Crystal.