v2.3.0.15
Supplemental Financial Information (Accounts Receivable, Net) (Details) (USD $)
In Millions
Sep. 30, 2011
Dec. 31, 2010
Supplemental Information For Property, Casualty Insurance Underwriters [Line Items]  
Accounts receivable$ 666.9$ 217.7
Allowance for doubtful accounts(12.0)(3.1)
Accounts receivable, net654.9214.6
Trade [Member]
  
Supplemental Information For Property, Casualty Insurance Underwriters [Line Items]  
Accounts receivable624.2209.9
Other [Member]
  
Supplemental Information For Property, Casualty Insurance Underwriters [Line Items]  
Accounts receivable$ 42.7$ 7.8