Goodwill And Other Intangible Assets And Liabilities (Schedule Of Earnings To Be Recognized On Below Market Sales Contract) (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Below-market sales contracts revenue for 2012 (remaining three months)	$ 14.7
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
Below-market sales contracts revenue for 2017	0
Total	$ 129.8