Retirement Plans Contributions to Multiemployer Pension Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost	$ 43	$ 44	$ 38
Multiemployer plans, withdrawal liability	$ 160
Multiemployer Plan, Pension, Insignificant, Employer Contribution under Collective-Bargaining Arrangement to Total Employer Contribution, Percentage	5.00%
Minneapolis Food Distributing Industry Pension Plan
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost	$ 5	5	5
Teamster Pension Trust Fund of Philadelphia and Vicinity
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost	4	4	4
Local 703 I.B. of T. Grocery and Food Employees’  Pension Plan
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost	4	2	2
United Teamsters Trust Fund A
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost	1	1	2
Warehouse Employees Local 169 and Employers Joint Pension Fund
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost	1	1	1
UFCW National Pension Fund
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost	1	1	1
Other funds
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost	$ 27	$ 30	$ 23
Minimum
Multiemployer Plans [Line Items]
Multiemployer Plan, Pension, Insignificant, Employer Contribution under Collective-Bargaining Arrangement to Total Employer Contribution, Percentage	5.00%