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External Debt and Financing Arrangements - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Debt Instrument [Line Items]      
Revolving credit facility, maximum borrowing capacity $ 650    
Term loan 350    
Revolving credit facility, extended expiration date 2018-07    
Term loan, extended expiration date 2018-07    
Term loan, outstanding borrowings 475.0   350.0
Notes payable to banks 9.7   6.0
Uncommitted bank lines of credit, which provide for unsecured borrowings for working capital $ 22.7   $ 22.7
Weighted-average interest rates on borrowings 9.80% 12.10%  
LIBOR | Minimum
     
Debt Instrument [Line Items]      
Interest rate over LIBOR 1.00%    
LIBOR | Maximum
     
Debt Instrument [Line Items]      
Interest rate over LIBOR 2.00%