Acquistions (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended
	Mar. 26, 2018	Dec. 12, 2017	Oct. 28, 2018	Oct. 29, 2017	Jul. 29, 2018
Business Acquisition [Line Items]
Long-term Debt			$ 8,391		$ 8,595
Goodwill			4,689		$ 4,580
Net sales			2,694	$ 2,161
Net earnings (loss)			194	275
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net			(4)	$ 0
Snyder's-Lance [Member]
Business Acquisition [Line Items]
Business Acquisition, Share Price	$ 50.00
Payments to Acquire Businesses, Gross	$ 6,112
Goodwill			3,006
Net sales			554
Net earnings (loss)			(6)
Pacific Foods [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross		$ 688
Goodwill		$ 202
Net sales			69
Net earnings (loss)			3
Payoff of Indebtedness [Member] | Snyder's-Lance [Member]
Business Acquisition [Line Items]
Long-term Debt	$ 1,100
Indefinite-lived Intangible Assets [Member] | Snyder's-Lance [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles			(134)
Other Noncurrent Liabilities [Member] | Snyder's-Lance [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities			43
Goodwill [Member] | Snyder's-Lance [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles			140
Finite-Lived Intangible Assets [Member] | Snyder's-Lance [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles			$ (52)