Restructuring and Cost Reduction Activities Project K Total Program Costs Since Inception Narrative (Details) $ in Millions	Jan. 02, 2021 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	$ 88
Project K
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	1,574
Project K | Revenue
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	6
Project K | Cost of goods sold
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	928
Project K | SGA
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	807
Project K | Other (income) expense
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	$ (167)