Supplemental Financial Statement Data (Schedule of Statement of Earnings) (Details) - USD ($) $ in Millions	3 Months Ended
Oct. 31, 2021	Nov. 01, 2020
Disclosure Text Block Supplement [Abstract]
Amortization of Intangible Assets	$ 11	$ 10
Net periodic benefits income, other than the service cost	(19)	(21)
Defined Benefit Plan, Actuarial (Gain) Loss	6	(4)
Transition services fees	0	(4)
Other expenses / (income)	(1)	(18)
Other	$ 1	$ 1

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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Amount of gain (loss), recognized immediately as component of net periodic benefit (cost) credit, for change in value of benefit obligation or plan assets from experience different from that assumed, change in actuarial assumption, or consequence of temporarily deviating from substantive plan. Includes, but is not limited to, amount in excess of ten percent of greater of fair value of plan assets or benefit obligation.

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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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Amount of revenue and income classified as other.

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Amount of income related to nonoperating activities, classified as other.

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