Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 25, 2021 USD ($) Age	Dec. 26, 2020 USD ($)	Dec. 28, 2019 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Percent of cost for inventories determined using LIFO	83.00%	84.00%
Excess of Replacement or Current Costs over Stated LIFO Value	$ 658,098,000	$ 548,749,000
Postretirement Benefits Number of Years of Full Time Service for Eligibility	5 years
Age Plus Years of Credited Service Required to Qualify for Post Retirement Benefits | Age	65
Minimum Retirement Age For Eligible Employees Of Postretirement Plans | Age	55
Minimum Years of Full Time Service for Eligible Employees of Postretirement Plans	10 years
Accumulation of Losses Exceeds Benefit Obligation	10.00%
Accrued Postretirement Benefit Obligation	$ 122,668,000	$ 131,356,000
Percent Revenue from Grocery Sales	84.00%	85.00%	84.00%
Percent Revenue from other products and Services	16.00%	15.00%	16.00%
Advertising costs	$ 280,199,000	$ 244,839,000	$ 245,403,000
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Lessee, Lease, Term of Contract	20 years
Lessee Leases, Renewal Term	5 years