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Basis of Interim Financial Statements (Tables)
 6 Months Ended
Jun. 30, 2011
Basis of Interim Financial Statements [Abstract]  
Accrued Expenses
                 
    June 30,     December 31,  
    2011     2010  
    (Dollars in millions)  
Deferred revenue
  $ 355.5     $ 274.9  
Wages, vacations, pensions and other employment costs
    285.5       313.2  
Warranties
    98.7       90.0  
Postretirement benefits other than pensions
    28.2       29.7  
Accrued taxes
    40.6       31.1  
Foreign currency hedges
    8.4       22.5  
Other
    284.3       280.4  
 
           
Total
  $ 1,101.2     $ 1,041.8