Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016 USD ($) Age	Dec. 26, 2015 USD ($)	Dec. 27, 2014 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Percent of cost for inventories determined using LIFO	83.00%	84.00%
Inventories and current assets excess if reported as FIFO | $	$ 441,860,000	$ 446,503,000
Advertising costs | $	$ 260,367,000	$ 248,454,000	$ 232,499,000
Postretirement Benefits Number Of Years Of Service For Eligibility	5 years
Age Plus Years Of Service Required To Qualify For Post Retirement Benefits | Age	65
Minimum Retirement Age For Eligible Employees Of Postretirement Plans | Age	55
Minimum Years Of Service For Eligible Employees Of Postretirement Plans	10 years
Accumulation Of Losses Exceeds Benefit Obligation	10.00%