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
	Dec. 30, 2016		Jan. 01, 2016		Dec. 26, 2014
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)		(1.0)		(0.9)
Net amortization	0.3		0.4		0.3
Net periodic cost (income)	0.0		0.1		0.1
Pension Plans | Central America
Defined Benefit Plan Disclosure [Line Items]
Net periodic cost (income)	0.1		0.1		0.3
Pension Plans | United Kingdom
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.0	[1]	0.0	[1]	0.0
Interest cost	1.9	[1]	2.2	[1]	2.7
Expected return on assets	(2.6)		(2.9)		(3.5)
Net amortization	0.0		0.0		(0.1)
Net periodic cost (income)	(0.7)		(0.7)		(0.9)
Post-retirement Plans | Central America
Defined Benefit Plan Disclosure [Line Items]
Service cost	5.2		5.8		5.2
Interest cost	3.8		3.7		3.6
Expected return on assets	0.0		0.0		0.0
Net amortization	0.8		1.1		0.9
Net periodic cost (income)	$ 9.8		$ 10.6		$ 9.7

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