Stockholders' Equity - Restricted stock unit activity and related share-based compensation expense (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		12 Months Ended
Nov. 01, 2021	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2022
Number of Shares
Nonvested, number of shares, beginning balance (in shares)		11,894	11,467	9,038
Granted (in shares)		4,253	5,260	6,634
Vested (in shares)		(4,233)	(4,019)	(3,154)
Forfeited (in shares)		(990)	(814)	(1,051)
Nonvested, number of shares, ending balance (in shares)		10,924	11,894	11,467
Weighted-Average Grant Date Fair Value
Nonvested, weighted average grant date fair value per share, beginning balance (in dollars per share)		$ 433.70	$ 413.32	$ 345.86
Granted (in dollars per share)		590.59	452.45	466.12
Vested (in dollars per share)		439.08	414.12	351.80
Forfeited (in dollars per share)		390.17	364.45	351.15
Nonvested, weighted average grant date fair value per share, ending balance (in dollars per share)		$ 496.64	$ 433.70	$ 413.32
Total tax benefit related to RSU share-based compensation expense		$ 594	$ 373	$ 396
The Rocket Science Group, LLC (Mailchimp)
Weighted-Average Grant Date Fair Value
Fair value of equity awards	$ 6,300
Business acquisition, equity interest issued (in shares)	10,100
Restricted Stock Units (RSUs)
Weighted-Average Grant Date Fair Value
Total fair market value of shares vested		2,575	1,673	1,658
Share-based compensation for RSUs		1,857	1,636	1,248
Total tax benefit related to RSU share-based compensation expense		545	339	375
Cash tax benefits realized for tax deductions for RSUs		$ 526	$ 347	$ 334
Restricted Stock Units (RSUs) \| The Rocket Science Group, LLC (Mailchimp)
Weighted-Average Grant Date Fair Value
Fair value of equity awards	$ 211
Stock units issued in substitution of outstanding equity incentive awards	583
Grant date fair value of equity awards	$ 355
Business acquisition, equity interest issued (in shares)	325

Actual tax benefits realized for tax deductions for restricted stock units.

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Business Combination, Consideration Transferred, Equity Interest Issued and Issuable, Outstanding Equity Incentive Awards, Amount

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Business Combination, Consideration Transferred, Equity Issued And Issuable, Outstanding Equity Incentive Awards, Number Of Shares

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Number of shares of equity interests issued or issuable to acquire entity.

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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