Acquistions Acquisitions (Schedule of Purchase Price Allocation) (Details) - USD ($) $ in Millions	Jul. 28, 2019	Jul. 29, 2018	Mar. 26, 2018	Dec. 12, 2017	Jul. 30, 2017
Business Acquisition [Line Items]
Goodwill	$ 4,017	$ 3,864			$ 811
Snyder's-Lance [Member]
Business Acquisition [Line Items]
Cash			$ 21
Accounts receivable			220
Inventories			219
Other current assets			32
Plant assets			696
Goodwill			3,006
Other intangible assets			2,761
Other assets			65
Short-term debt			(1)
Accounts payable			(124)
Accrued liabilities			(115)
Deferred incomes taxes			(597)
Other liabilities			(24)
Noncontrolling interest			(47)
Total assets acquired and liabilities assumed			$ 6,112
Pacific Foods [Member]
Business Acquisition [Line Items]
Cash				$ 7
Accounts receivable				16
Inventories				48
Other current assets				1
Plant assets				78
Goodwill				202
Other intangible assets				366
Other assets				0
Short-term debt				0
Accounts payable				(24)
Accrued liabilities				(6)
Deferred incomes taxes				0
Other liabilities				0
Noncontrolling interest				0
Total assets acquired and liabilities assumed				$ 688