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Consolidated Balance Sheet (Parentheticals) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Assets [Abstract]    
Allowance for Doubtful Accounts $ 197.6 $ 149.2
Liabilities and Equity [Abstract]    
Common Stock, Shares, Outstanding (in shares) 97.8 102.4