XML 101 R80.htm IDEA: XBRL DOCUMENT v3.20.4
Associate Retirement Plans - Additional Information (Detail) - USD ($)
 12 Months Ended
Jan. 02, 2021
Dec. 28, 2019
Dec. 29, 2018
Defined Benefit Plan Disclosure [Line Items]      
Defined contribution plans expense $ 12,200,000 $ 11,500,000 $ 7,000,000.0
Cash surrender value of plan assets included in other long term assets 99,242,000 82,660,000  
Aggregate amount of life insurance coverage $ 15,000,000.0 15,000,000.0  
Defined contribution plan employees minimum period of service 10 years    
Defined contribution plan employees age to eligible under the plan 55 years    
Multiplier effect of Monthly postretirement health care benefits to covered employees $ 5    
Actuarial gains and losses are amortized when accumulation of such gains and losses exceeds 10.00%    
Multiemployer plans, certified zone status Red    
Critical and declining zone fund status Less than 65 percent    
Maximum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Status or critical and declining zone plans 65.00%    
Projected insolvent period based on active to inactive participants ratio. 20 years    
Minimum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Projected insolvent period based on active to inactive participants ratio. 15 years    
Michigan Conference of Teamsters and Ohio Conference of Teamsters Health and Welfare Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Pension contributions during last plan year $ 13,700,000 13,800,000 13,800,000
Central States, Southeast and Southwest Areas Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Pension contributions during last plan year $ 14,100,000 14,000,000.0 13,300,000
Collective bargaining arrangement description The Company is party to four CBAs that require contributions to the Plan with expiration dates ranging from January 2022 to October 2022. These CBAs cover warehouse personnel and drivers in Grand Rapids, Michigan and Bellefontaine and Lima, Ohio.    
Central States, Southeast and Southwest Areas Pension Plan [Member] | Maximum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Expiration dates of collective bargaining arrangements Oct. 31, 2022    
Percentage representing contribution funded to plan total contribution 5.00%    
Central States, Southeast and Southwest Areas Pension Plan [Member] | Minimum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Expiration dates of collective bargaining arrangements Jan. 31, 2022    
Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined contribution plans expense   1,500,000  
Frozen pension plan, termination date Jul. 31, 2018    
Realized gains related to refunds from annuity provider $ 1,193,000    
Pre-tax settlement charges   18,200,000  
Defined benefit termination plan   18,000,000.0  
Distribution charges   72,600,000 3,300,000
Settlement accounting charges   18,244,000 785,000
Fair value of plan assets 2,689,000 1,496,000 $ 74,241,000
Pension Plan [Member] | Significant unobservable inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Plan [Member] | Money Market Funds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,700,000 1,500,000  
Retiree Medical Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Expected Company contribution in 2021 500,000    
Cash Surrender Value [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Cash surrender value of plan assets included in other long term assets $ 4,300,000 $ 4,300,000