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Retirement and Other Employee Benefits (Amounts of AOCI Expected to be Amortized as a Component of Net Period Cost) (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 30, 2011
CENTRAL AMERICA [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
2012 Amortization of net losses (gains) $ 0
UNITED STATES Pension Plans [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
2012 Amortization of net losses (gains) 0.3
Pension Plans, Defined Benefit [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
2012 Amortization of net losses (gains) (0.1)
Post-retirement Plans [Member] | CENTRAL AMERICA [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
2012 Amortization of net losses (gains) $ 1.1