Postretirement Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2013
Defined Benefit Plan Disclosure [Line Items]
Prior unrecognized gain included in Accumulated OCI	$ 0.1
Voluntary Employees Beneficiary Association Plan Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Description of basis used to determine overall expected long-term, rate-of-return-on-assets assumption	The objective of the VEBA trust is to achieve net of expense returns that meet or exceed the 7.6% long-term, rate-of-return-on-assets assumption used for reporting purposes
U.S. Postretirement Health Care Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Health care cost trend rate, 2014	7.30%
Health care cost trend rate, 2028	4.50%
Increase in accumulated postretirement benefit obligation	1.0
Increase in service cost and interest cost components	0.1
Decrease in accumulated postretirement benefit obligation	0.9
Decrease in service cost and interest cost components	$ 0.1