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Business Acquisitions Divested Entities Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 28, 2019	Dec. 29, 2018
Business Acquisition [Line Items]
Income (loss) from discontinued operations—net of tax	$ (1)	$ 1	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0
Food Group
Business Acquisition [Line Items]
Divested entities pro forma net sales									392	516
Income (loss) from discontinued operations—net of tax									$ 5	$ 13
Divested entities pro forma basic earnings per share									$ 0.03	$ 0.06
Divested entities pro forma diluted earnings per share									$ 0.02	$ 0.06