Annual report pursuant to Section 13 and 15(d)

Goodwill And Other Intangible Assets And Liabilities (Schedule Of Earnings To Be Recognized On Below Market Sales Contract) (Details)

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Goodwill And Other Intangible Assets And Liabilities (Schedule Of Earnings To Be Recognized On Below Market Sales Contract) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Goodwill And Other Intangible Assets And Liabilities [Abstract]  
Below-market sales contracts revenue for 2012 $ 48.8
Below-market sales contracts revenue for 2013 45.3
Below-market sales contracts revenue for 2014 23.0
Below-market sales contracts revenue for 2015 23.0
Below-market sales contracts revenue for 2016 23.1
Below-market sales contracts revenue for 2012 to 2016 $ 163.2