Retirement and Other Employee Benefits - Narrative (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2018	Dec. 29, 2017	Dec. 30, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net gains occurring during the year	$ 5.1	$ 5.7
Retirement benefits	$ 91.3	96.2
Financial Institutions
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Portfolio of stocks invested, industry concentration	38.00%
Consumer Goods
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Portfolio of stocks invested, industry concentration	10.00%
Industrial
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Portfolio of stocks invested, industry concentration	10.00%
Other Industries
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Portfolio of stocks invested, industry concentration	27.00%
Technology
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Portfolio of stocks invested, industry concentration	15.00%
Equity Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets target allocation percentage, equity securities	23.00%
Other international companies
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets target allocation percentage, equity securities	9.00%
Fixed income securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets target allocation percentage, equity securities	19.00%
Cash
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets target allocation percentage, equity securities	49.00%
Non-United States
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Retirement benefits	$ 16.8	17.7
Pension plans | United States
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected contributions in next fiscal year	0.2
Plan amendment due to GMP equalization	0.0	0.0
Net gains occurring during the year	1.1	(0.3)
Net periodic pension costs	(0.1)	0.0	$ 0.0
Expected future benefit payments, thereafter	5.2
Pension plans | United States | Change in Assumptions for Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Increase (decrease) in benefit obligation	(0.2)
Pension plans | United Kingdom
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected contributions in next fiscal year	1.8
Plan amendment due to GMP equalization	1.4	(0.3)
Net gains occurring during the year	5.7	(1.0)
Net periodic pension costs	(1.4)	(0.9)	(0.7)
Expected future benefit payments, thereafter	$ 11.7
Pension plans | United Kingdom | United Kingdom companies
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets target allocation percentage, equity securities	9.00%
Pension plans | United Kingdom | Other international companies
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets target allocation percentage, equity securities	29.00%
Pension plans | United Kingdom | Growth securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets target allocation percentage, equity securities	33.00%
Pension plans | United Kingdom | Liability-driven investments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets target allocation percentage, equity securities	16.00%
Pension plans | United Kingdom | United Kingdom corporate bonds
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets target allocation percentage, equity securities	12.00%
Pension plans | Non-United States
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net gains occurring during the year	$ 1.4	1.7
Post-retirement plans | United States
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan expense	1.1	1.2	1.1
Post-retirement plans | Central America
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan amendment due to GMP equalization	0.0	0.0
Net gains occurring during the year	(6.6)	0.5
Net periodic pension costs	10.7	10.8	9.8
Expected future benefit payments, thereafter	32.3
Post-retirement plans | Kenya
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accrued benefits	7.3	6.1
Net gains occurring during the year	(2.0)	(1.3)
Net periodic pension costs	1.2	1.2	1.1
Expected future benefit payments, next five years	4.4
Expected future benefit payments, thereafter	4.8
Post-retirement plans | Non-United States | Former Executives
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Retirement benefits	2.1	2.7
Supplemental unemployment benefits | Central America
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accrued benefits	4.2	5.0
Net gains occurring during the year	0.7	0.6
Net periodic pension costs	0.1	0.1	$ 0.1
Expected future benefit payments, next five years	3.1
Expected future benefit payments, thereafter	$ 1.6
Minimum | Equity Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan asset target allocation percentage	50.00%
Minimum | Fixed income securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan asset target allocation percentage	30.00%
Maximum | Equity Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan asset target allocation percentage	70.00%
Maximum | Fixed income securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan asset target allocation percentage	50.00%
Operating income | Accounting Standards Update 2017-07
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Effect of new accounting principle	$ (3.3)	(4.3)
Other expense, net | Accounting Standards Update 2017-07
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Effect of new accounting principle	$ 3.3
Pro Forma | Other expense, net | Accounting Standards Update 2017-07
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Effect of new accounting principle		$ 4.3