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Share-Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Assumed In Acquisition During Period, Number

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Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Future Issuance Under Assumed Plan

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Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Under Assumed Plan

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Share Based Compensation Arrangement By Share Based Payment Award Percentage Of Lower Of Fair Market Value On Frist Or Last Day Of Offering Period

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Share Based Compensation Arrangement By Share Based Payment Award Years Of Term

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Share-based Payment Arrangement, Expense, Percentage

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Shares available for issuance under Employee Stock Purchase Plan.

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Stock Accrual Period, Employee Stock Purchase Plans, Number of Accrual Periods

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Stock Offering Period, Number of Months in Accrual Period

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Treasury Stock, Value, Acquired, Cost Method, Settled After Period

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Aggregate dividends paid during the period for each share of common stock outstanding.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).

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The per share amount of a dividend declared, but not paid, as of the financial reporting date.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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Stockholders' Equity - Additional Information (Details) $ / shares in Units, $ in Millions		12 Months Ended
	Dec. 03, 2020 shares	Jul. 31, 2021 USD ($) period $ / shares shares	Jul. 31, 2020 USD ($) shares	Jul. 31, 2019 USD ($) shares	Aug. 31, 2021 $ / shares	Aug. 20, 2021 USD ($)	Jul. 31, 2018 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchased during period (in shares) \| $		$ 1,022	$ 318	$ 561
Stock repurchased and settled after period (in shares) \| $		$ 17
Common stock dividends, cash paid (in dollars per share) \| $ / shares		$ 2.36
Common stock dividends \| $		$ (651)
Common stock, shares authorized (in shares)		750,000,000	750,000,000
Pool shares reduced for each share granted (in shares)		2.3
Pool shares increased for each share forfeited (in shares)		2.3
Equity instruments other than options, assumed in acquisition during period, number (in shares)		1,998,000
Shares available for grant (in shares)		16,851,000	18,047,000	21,058,000			22,791,000
Stock offering period, months, employee stock purchase plans		6 months
Stock accrual period, employee stock purchase plans, number of accrual periods \| period		2
Stock offering period, number of months in accrual period		3 months
Percentage of lower of the closing price for stock on the first day last day of the offering period		85.00%
Shares issued during period for Employee Stock Purchase Plans (in shares)		405,268	449,999	485,011
Shares available for issuance under Employee Stock Purchase Plan (in shares)		1,050,916
Credit Karma
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant under assumed plan (in shares)	4,298,127
Number of shares available for future issuance under assumed plan (in shares)	2,300,246
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of years until options vest		7 years
Shares available for grant (in shares)		16,900,000
Stock Options \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		3 years
Stock Options \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		4 years
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of total share-based compensation expense		80.00%
Restricted Stock Units (RSUs) \| Credit Karma
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity instruments other than options, assumed in acquisition during period, number (in shares)	1,997,881
Restricted Stock Units (RSUs) \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		3 years
Restricted Stock Units (RSUs) \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		4 years
Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares)		23,800,000
Restated 2005 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares)		138,100,000
Restated 2005 Plan \| Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pool shares reduced for each share granted (in shares)		1
Number of shares added back to plan when grants are forfeited (in shares)		1
Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, authorized amount (in shares) \| $						$ 2,000
Dividend per share payable (in dollars per share) \| $ / shares					$ 0.68
Current Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program remaining authorized repurchase amount \| $		$ 1,300
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchases under stock repurchase programs (in shares)		2,422,000	1,176,000	2,455,000