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Long-Term Debt (Annual Maturities Relating To Long-Term Debt) (Details) (USD $)
In Millions
Sep. 30, 2011
Dec. 31, 2010
Long-term Debt, Unclassified [Abstract]  
Remainder 2011$ 49.3 
2012356.7 
2013476.6 
201474.7 
201562.8 
Thereafter216.9 
Total$ 1,237.0$ 888.8