Benefit Plans - Significant Assumptions Used (Detail)	12 Months Ended
	Jan. 03, 2016	Dec. 28, 2014	Dec. 29, 2013
Benefit obligation at the measurement date:
Discount rate	4.72%	4.32%	5.21%
Net periodic pension cost for the fiscal year:
Weighted average expected long-term rate of return on plan assets	6.50%
Pension Plans [Member]
Benefit obligation at the measurement date:
Discount rate	4.72%	4.32%	5.21%
Weighted average rate of compensation increase	0.00%	0.00%	0.00%
Net periodic pension cost for the fiscal year:
Discount rate	4.32%	5.21%	4.47%
Weighted average expected long-term rate of return on plan assets	6.50%	7.00%	7.00%
Weighted average rate of compensation increase	0.00%	0.00%	0.00%
Postretirement Benefits [Member]
Benefit obligation at the measurement date:
Discount rate	4.53%	4.13%	4.96%
Net periodic pension cost for the fiscal year:
Discount rate	4.13%	4.96%	4.11%