Segment Reporting Net Sales by Product Category (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Revenue from External Customer [Line Items]
Net sales	$ 6,157	$ 5,959
Condiments and sauces
Revenue from External Customer [Line Items]
Net sales	1,581	1,513
Cheese and dairy
Revenue from External Customer [Line Items]
Net sales	1,139	1,194
Ambient foods
Revenue from External Customer [Line Items]
Net sales	716	598
Frozen and chilled foods
Revenue from External Customer [Line Items]
Net sales	648	605
Meats and seafood
Revenue from External Customer [Line Items]
Net sales	590	587
Refreshment beverages
Revenue from External Customer [Line Items]
Net sales	389	357
Coffee
Revenue from External Customer [Line Items]
Net sales	275	308
Infant and nutrition
Revenue from External Customer [Line Items]
Net sales	113	129
Desserts, toppings and baking
Revenue from External Customer [Line Items]
Net sales	204	194
Nuts and salted snacks
Revenue from External Customer [Line Items]
Net sales	250	225
Other
Revenue from External Customer [Line Items]
Net sales	$ 252	$ 249