Benefit Plans - Assumptions Used to Determine Net Periodic Benefit Cost (Detail)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
U.K. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.50%	4.60%	5.40%
Expected long-term rate of return on plan assets	6.10%	5.70%	6.90%
Inflation factor	2.30%	3.30%	3.70%
U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.40%	3.50%	4.10%
Expected long-term rate of return on plan assets	7.00%	7.00%	7.00%