Equity Award Plans (Fair Value Assumptions and Grant-Date Fair Values) (Details) - $ / shares	12 Months Ended
Jul. 31, 2026	Jul. 31, 2025	Jul. 31, 2024
PSUs subject to the market conditions
Share-based Compensation Arrangement by Share-based Payment Award
Dividend yield	0.00%	0.00%	0.00%
Risk-free interest rate, minimum	3.60%	3.70%	4.40%
Risk free interest rate, maximum	3.90%	4.50%	5.30%
PSUs subject to the market conditions \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Volatility	36.60%	43.50%	40.80%
Expected term (in years)	1 year	1 year	10 months 24 days
Grant date fair value (in usd per share)	$ 226.06	$ 264.51	$ 173.46
PSUs subject to the market conditions \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Volatility	42.60%	47.60%	43.40%
Expected term (in years)	3 years	2 years 10 months 24 days	2 years 10 months 24 days
Grant date fair value (in usd per share)	$ 261.62	$ 305.83	$ 310.61
ESPP
Share-based Compensation Arrangement by Share-based Payment Award
Dividend yield	0.00%	0.00%	0.00%
Risk-free interest rate, minimum	3.50%	3.90%	4.60%
Risk free interest rate, maximum	4.00%	4.80%	5.50%
ESPP \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Volatility	35.60%	34.30%	39.60%
Expected term (in years)	6 months	6 months	6 months
Grant date fair value (in usd per share)	$ 32.77	$ 45.43	$ 32.81
ESPP \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Volatility	39.20%	43.30%	50.00%
Expected term (in years)	2 years	2 years	2 years
Grant date fair value (in usd per share)	$ 73.67	$ 74.81	$ 66.66

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 estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The maximum risk-free interest rate assumption that is used in valuing an option on its own shares.

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The minimum risk-free interest rate assumption that is used in valuing an option on its own shares.

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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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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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