Business Acquisitions Schedule of Business Acquisitions (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 28, 2020	Dec. 28, 2019
Business Acquisition [Line Items]
Goodwill	$ 4,728	$ 4,728
Customer Relationships
Business Acquisition [Line Items]
Customer relationships	$ 767	$ 789
Maximum | Customer Relationships
Business Acquisition [Line Items]
Estimated useful lives of intangible assets (in years)	15 years
Food Group
Business Acquisition [Line Items]
Accounts receivable	$ 145
Inventories	165
Assets of discontinued operations	133
Other current assets	7
Property and equipment	209
Goodwill	761
Other intangibles	695
Other assets	47
Accounts payable	(200)
Accrued expenses and other current liabilities	(69)
Liabilities of discontinued operations	(19)
Other long-term liabilities, including financing leases	(42)
Cash paid for acquisition	1,832
Indefinite-lived trade names	39
Food Group | Customer Relationships
Business Acquisition [Line Items]
Customer relationships	$ 656
Food Group | Maximum | Customer Relationships
Business Acquisition [Line Items]
Estimated useful lives of intangible assets (in years)	15 years