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Derivative Financial Instruments - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 23, 2012
Mar. 31, 2012
Mar. 31, 2011
Derivative Instruments and Hedging Activities Disclosure [Line Items]      
Notional amount of interest-rate contracts   $ 3,251.9  
Notional maturities for interest-rate contracts 2012   514.2  
Notional maturities for interest-rate contracts 2013   715.6  
Notional maturities for interest-rate contracts 2014   1,117.6  
Notional maturities for interest-rate contracts 2015   394.0  
Notional maturities for interest-rate contracts 2016   39.6  
Notional maturities for interest-rate contracts thereafter   470.9  
Notional amount of outstanding foreign-exchange contracts   212.3  
Maximum length of future cash flow hedges 6.2 years    
Recognized gain (loss) on the ineffective portion   0.2 0.4
Accumulated net loss on derivative contracts included in accumulated other comprehensive loss expected to be reclassified to interest expense or cost of sales in the following 12 months   $ 38.0  
Foreign Exchange Contract
     
Derivative Instruments and Hedging Activities Disclosure [Line Items]      
Foreign-exchange contracts maturity period   Within one year