Retirement and Other Employee Benefits (Reconciliation of Benefit Obligations, Plan Assets and Funded Status for Defined Benefit Pension Plans and Post-Retirement Plans) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012		Dec. 30, 2011		Dec. 31, 2010
Change in Plan Assets:
Beginning fair value	$ 12.2
Ending fair value	13.6		12.2
Amounts recognized in Accumulated other comprehensive income (loss):
Net (losses) gains occuring during the year	4.8		4.5
CENTRAL AMERICA [Member]
Amounts recognized in Accumulated other comprehensive income (loss):
Net (losses) gains occuring during the year	0.6		0.6		0.9
UNITED KINGDOM [Member]
Change in Plan Assets:
Ending fair value	45.6		39.3
UNITED STATES Pension Plans [Member]
Change in Benefit Obligation:
Beginning benefit obligation	18.3	[1]	17.2	[1]
Service cost	0	[1]	0	[1]	0
Interest cost	0.8	[1]	0.9	[1]	0.9
Actuarial loss (gain)	1.4	[1]	1.6	[1]
Benefits paid	(1.4)	[1]	(1.4)	[1]
Exchange rate changes	0	[1],[2]	0	[1],[2]
Ending benefit obligation	19.1	[1]	18.3	[1]	17.2	[1]
Change in Plan Assets:
Beginning fair value	12.2	[1]	12.1	[1]
Actual return on plan assets	1.4	[1]	(0.2)	[1]
Company contributions	1.3	[1]	1.7	[1]
Benefits paid	(1.4)	[1]	(1.4)	[1]
Exchange rate changes	0	[1],[2]	0	[1],[2]
Ending fair value	13.5	[1]	12.2	[1]	12.1	[1]
Amounts recognized in the Consolidated Balance Sheets:
Accounts payable and accrued expenses (current liability)	0	[1]	0	[1]
Retirement benefits liability (noncurrent liability)	5.6	[1]	6.1	[1]
Net amount recognized in the Consolidated Balance Sheets	5.6	[1]	6.1	[1]
Amounts recognized in Accumulated other comprehensive income (loss):
Net actuarial (loss) gain	(9.7)	[1]	(9.0)	[1]
Net amount recognized in Accumulated other comprehensive income (loss)	(9.7)	[1]	(9.0)	[1]	(6.4)
Net (losses) gains occuring during the year	(1.0)		(2.8)
Pension Plans [Member]
Amounts recognized in Accumulated other comprehensive income (loss):
Net (losses) gains occuring during the year	(4.1)		(1.0)
Pension Plans [Member] | UNITED KINGDOM [Member]
Change in Benefit Obligation:
Beginning benefit obligation	52.0	[1]	56.4	[1]
Service cost	0	[1]	0	[1]	0
Interest cost	2.4	[1]	3.0	[1]	3.1
Actuarial loss (gain)	4.9	[1]	(5.4)	[1]
Benefits paid	(1.8)	[1]	(1.8)	[1]
Exchange rate changes	2.2	[1],[2]	(0.2)	[1],[2]
Ending benefit obligation	59.7	[1]	52.0	[1]	56.4	[1]
Change in Plan Assets:
Beginning fair value	39.3	[1]	40.4	[1]
Actual return on plan assets	4.1	[1]	(1.9)	[1]
Company contributions	2.4	[1]	2.7	[1]
Benefits paid	(1.8)	[1]	(1.8)	[1]
Exchange rate changes	1.6	[1],[2]	(0.1)	[1],[2]
Ending fair value	45.6	[1]	39.3	[1]	40.4	[1]
Amounts recognized in the Consolidated Balance Sheets:
Accounts payable and accrued expenses (current liability)	0	[1]	0	[1]
Retirement benefits liability (noncurrent liability)	14.0	[1]	12.7	[1]
Net amount recognized in the Consolidated Balance Sheets	14.0	[1]	12.7	[1]
Amounts recognized in Accumulated other comprehensive income (loss):
Net actuarial (loss) gain	2.8	[1]	5.9	[1]
Net amount recognized in Accumulated other comprehensive income (loss)	2.8	[1]	5.9	[1]	5.2
Net (losses) gains occuring during the year	(3.3)		0.7
Post-retirement Plans [Member] | CENTRAL AMERICA [Member]
Change in Benefit Obligation:
Beginning benefit obligation	41.4		36.8
Service cost	4.2		3.6		3.3
Interest cost	3.0		3.0		3.6
Actuarial loss (gain)	7.8		0.7
Benefits paid	(4.0)		(3.3)
Exchange rate changes	(0.4)	[2]	0.6	[2]
Ending benefit obligation	52.0		41.4		36.8
Change in Plan Assets:
Beginning fair value	0		0
Actual return on plan assets	0		0
Company contributions	4.0		3.3
Benefits paid	(4.0)		(3.3)
Exchange rate changes	0	[2]	0	[2]
Ending fair value	0		0		0
Amounts recognized in the Consolidated Balance Sheets:
Accounts payable and accrued expenses (current liability)	5.7		4.9
Retirement benefits liability (noncurrent liability)	46.3		36.5
Net amount recognized in the Consolidated Balance Sheets	52.0		41.4
Amounts recognized in Accumulated other comprehensive income (loss):
Net actuarial (loss) gain	(20.4)		(13.8)
Net amount recognized in Accumulated other comprehensive income (loss)	(20.4)		(13.8)		(14.2)
Net (losses) gains occuring during the year	$ (6.9)		$ (0.8)

[1] The accumulated benefit obligation is the same as the projected benefit obligation.

[2] The exchange rate difference included in the reconciliation of the change in benefit obligation and the change in plan assets above results from the weakening of the U.S. dollar relative to the British pound for the U.K. plan and the strengthening of the U.S. dollar versus Central American currencies such as the Costa Rican colon and Guatemalan quetzal for the Central American plans as of December 28, 2012 and December 30, 2011 when compared to the previous year.