Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments and Hedging Activities - Additional Information (Detail)

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Derivative Financial Instruments and Hedging Activities - Additional Information (Detail) (USD $)
 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2011
Jun. 30, 2011
Maximum
Jun. 30, 2011
Maximum
Jun. 30, 2012
Interest Rate Swap Derivative Contracts In 2011
Jun. 30, 2012
Interest Rate Swap Derivative Contracts In 2003
Derivative Instruments and Hedging Activities Disclosure [Line Items]                
Notional amount of foreign currency derivatives $ 1,600,000,000 $ 1,600,000,000 $ 1,500,000,000 $ 1,500,000,000        
Higher derivative maturity range by months   20 months            
Miscellaneous Income (Expense) for derivatives designated as hedging instruments 1,100,000 1,900,000     1,000,000 1,000,000    
Accumulated OCI including net pretax deferred gains for foreign exchange contracts   32,900,000            
Remaining pretax deferred net loss in Accumulated OCI $ 41,400,000 $ 41,400,000            
Long-term debt, maturity date             Dec. 31, 2021 Dec. 31, 2033