Retirement and Other Employee Benefits - Net Periodic Pension Cost of Defined Benefit Pension and Post-Retirement Benefit Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Jan. 01, 2016		Dec. 26, 2014		Dec. 27, 2013
US Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0.0	[1]	$ 0.0	[1]	$ 0.0
Interest cost	0.7	[1]	0.7	[1]	0.7
Expected return on assets	(1.0)		(0.9)		(1.0)
Net amortization	0.4		0.3		0.4
Net periodic cost (income)	0.1		0.1		0.1
Pension Plans | Central America
Defined Benefit Plan Disclosure [Line Items]
Net periodic cost (income)	0.1		0.3		0.3
Pension Plans | United Kingdom
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.0	[1]	0.0	[1]	0.0
Interest cost	2.2	[1]	2.7	[1]	2.3
Expected return on assets	(2.9)		(3.5)		(2.4)
Net amortization	0.0		(0.1)		0.0
Net periodic cost (income)	(0.7)		(0.9)		(0.1)
Post-retirement Plans | Central America
Defined Benefit Plan Disclosure [Line Items]
Service cost	5.8		5.2		5.5
Interest cost	3.7		3.6		3.3
Expected return on assets	0.0		0.0		0.0
Net amortization	1.1		0.9		1.6
Net periodic cost (income)	$ 10.6		$ 9.7		$ 10.4

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