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Retirement and Other Employee Benefits (Narrative) (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 28, 2012
Dec. 30, 2011
Dec. 31, 2010
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Increase in amount recognized in accumulated other comprehensive income due to change in the method of calculating the discount rate and rate of increase in compensation levels $ 4.8 $ 4.5  
Expected contributions, 2013 0.7    
Expected contributions, 2014 0.7    
Expected contributions, 2015 0.7    
Expected contributions, 2016 0.7    
Expected contributions, 2017 and thereafter 0.7    
Actual return on plan assets, percentage 10.00% (5.00%)  
Defined contribution plan expense 1.1 1.0 0.9
Financial Institutions [Member]
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Portfolio of stocks invested, industry concentration 23.00%    
Oil and Gas Company [Member]
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Portfolio of stocks invested, industry concentration 16.00%    
Basic Materials [Member]
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Portfolio of stocks invested, industry concentration 13.00%    
Consumer Goods [Member]
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Portfolio of stocks invested, industry concentration 12.00%    
Industrial [Member]
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Portfolio of stocks invested, industry concentration 11.00%    
Other Industries [Member]
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Portfolio of stocks invested, industry concentration 25.00%    
United Kingdom Companies [Member]
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Plan assets target allocation percentage, equity securities 40.00%    
U.S. and European Companies Equities [Member]
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Plan assets target allocation percentage, equity securities 28.00%    
Other International Companies [Member]
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Plan assets target allocation percentage, equity securities 12.00%    
Fixed Income Securities [Member]
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Plan assets target allocation percentage, equity securities 20.00%    
Fixed Income Securities [Member]
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Investment maturity period 15 years    
UNITED STATES Pension Plans [Member]
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Increase in amount recognized in accumulated other comprehensive income due to change in the method of calculating the discount rate and rate of increase in compensation levels (1.0) (2.8)  
2012 Amortization of net losses (gains) (0.4)    
Net periodic pension costs 0.1 0.1 0.1
Expected contributions, 2012 0    
Expected future benefit payments, thereafter 5.4    
Pension Plans [Member]
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Increase in amount recognized in accumulated other comprehensive income due to change in the method of calculating the discount rate and rate of increase in compensation levels (4.1) (1.0)  
Expected contributions, 2012 2.2    
UNITED KINGDOM [Member] | Pension Plans [Member]
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Increase in amount recognized in accumulated other comprehensive income due to change in the method of calculating the discount rate and rate of increase in compensation levels (3.3) 0.7  
Net periodic pension costs (0.1) 0.2 0.7
Impact in benefit obligation 6.3    
Expected future benefit payments, thereafter 12.6    
CENTRAL AMERICA [Member]
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Increase in amount recognized in accumulated other comprehensive income due to change in the method of calculating the discount rate and rate of increase in compensation levels 0.6 0.6 0.9
Accrued benefits 7.1 7.2  
2012 Amortization of net losses (gains) 0    
Expected contributions, 2012 0.7    
Expected future benefit payments, thereafter 3.6    
CENTRAL AMERICA [Member] | Pension Plans [Member]
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Net periodic pension costs $ 0.3 $ 0.3 $ 0.3
Maximum [Member]
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Plan assets target allocation percentage, equity securities (minimum) 50.00%    
Plan assets target allocation percentage, equity securities (maximum) 70.00%    
Minimum [Member]
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Plan assets target allocation percentage, equity securities (minimum) 30.00%    
Plan assets target allocation percentage, equity securities (maximum) 50.00%