Retirement Plans - Assumptions Used to Determine Net Periodic Benefit Cost (Detail)	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
U.K. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.80%	4.50%	4.60%
Expected long-term rate of return on plan assets	5.20%	6.20%	5.70%
Inflation factor	1.90%	2.40%	2.50%
U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.90%	4.20%	3.50%
Expected long-term rate of return on plan assets	7.20%	7.20%	7.00%