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Stockholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended		6 Months Ended
	Apr. 30, 2026	Jan. 31, 2026	Jul. 31, 2026	Jul. 31, 2025
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Number of authorized shares not disclosed			true
Common stock shares issued not disclosed			true
Unrecognized compensation cost related to unvested stock options granted			$ 312
Weighted-average grant date fair value of options granted (in usd per share)			$ 79.05	$ 97.28
Intrinsic value of options exercised			$ 3	$ 80
Authorized repurchase program, amount		$ 2,000
Share repurchase program term		2 years
Share repurchases, remaining balance			$ 1,400
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period of unvested stock (in years)			2 years
Fair value of options vested			$ 267	$ 138
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period of unvested stock (in years)			2 years 8 months 12 days
Weighted-average grant date fair value of options granted (in usd per share)			$ 173.46	$ 215.98
Unrecognized compensation cost related to unvested RSUs			$ 581
Grant date fair value of RSUs vested			$ 175	$ 126
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Restricted Stock Units (RSUs) \| Share-Based Payment Arrangement, Tranche Two
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Long-Term Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years