Business Acquisitions Schedule of Business Acquisitions (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 28, 2019	Dec. 29, 2018
Business Acquisition [Line Items]
Goodwill	$ 4,728	$ 3,967
Liabilities of discontinued operations	(27)	0
Customer Relationships
Business Acquisition [Line Items]
Customer relationships	$ 806	$ 154
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	166
Assets of discontinued operations	142
Other current assets	7
Property and equipment	200
Goodwill	761
Other intangibles	691
Other assets	47
Accounts payable	(200)
Accrued expenses and other current liabilities	(61)
Liabilities of discontinued operations	(27)
Other long-term liabilities, including financing leases	(42)
Cash paid for acquisition	1,829
Indefinite-lived trade names	39
Food Group | Customer Relationships
Business Acquisition [Line Items]
Customer relationships	$ 652
Food Group | Maximum | Customer Relationships
Business Acquisition [Line Items]
Estimated useful lives of intangible assets (in years)	15 years