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	3 Months Ended
	Mar. 31, 2012
Goodwill And Other Intangible Assets And Liabilities [Abstract]
Below-market sales contracts revenue for 2012 (remaining nine months)	$ 44.1
Below-market sales contracts revenue for 2013	46.0
Below-market sales contracts revenue for 2014	23.1
Below-market sales contracts revenue for 2015	23.0
Below-market sales contracts revenue for 2016	23.0
Total	$ 159.2