Goodwill And Other Intangible Assets And Liabilities (Estimated Amortization Expense Relating To Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Goodwill And Other Intangible Assets And Liabilities [Abstract]
Estimated amortization expense for 2012	$ 18.0
Estimated amortization expense for 2013	17.9
Estimated amortization expense for 2014	17.9
Estimated amortization expense for 2015	6.0
Estimated amortization expense for 2016	6.0
Estimated amortization expense for 2012 to 2016	$ 65.8