Business Acquisitions Divested Entities Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	9 Months Ended
Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Business Acquisition [Line Items]
Income from discontinued operations—net of tax	$ 1	$ 0	$ 1	$ 0
Food Group
Business Acquisition [Line Items]
Divested entities pro forma diluted earnings per share (per share)	$ 0.01	$ 0.02	$ 0.03	$ 0.04
Divested entities pro forma basic earnings per share (per share)	$ 0.02	$ 0.02	$ 0.03	$ 0.04
Income from discontinued operations—net of tax	$ 3	$ 4	$ 6	$ 8
Divested entities pro forma net sales	$ 114	$ 136	$ 372	$ 390

Pro forma basic earnings per share or earnings per unit, which is commonly presented in initial public offerings based on the terms of the offering.

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