Supplemental Financial Statement Data (Schedule of Statement of Earnings) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Apr. 28, 2019	Apr. 29, 2018	Apr. 28, 2019	Apr. 29, 2018
Amortization of Intangible Assets	$ 13	$ 6	$ 37	$ 9
Net periodic defined benefits income other than service cost	(21)	(23)	(61)	(87)
Defined Benefit Plan, settlement charges	28	0	28	0
Investment losses	(8)	1	(1)	1
Business combination, acquisition related costs	0	29	0	53
Legal settlements	0	22	0	22
Other expenses	8		10
Other Income		0		(5)
Other expenses / (income)	$ 20	$ 35	$ 13	$ (7)

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement.

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Amount of realized and unrealized gain (loss) on investment.

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The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings.

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Amount of expense (reversal of expense) for net periodic benefit cost components, excluding service cost component, of defined benefit plan. Amount includes, but is not limited to, interest cost, expected (return) loss on plan asset, amortization of prior service cost (credit), amortization of (gain) loss, amortization of transition (asset) obligation, settlement (gain) loss, curtailment (gain) loss and certain termination benefits.

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