Goodwill and Acquired Intangible Assets - Acquired intangible assets (Details) - USD ($) $ in Millions	Jul. 31, 2024	Jul. 31, 2023
Finite-Lived Intangible Assets [Abstract]
Cost	$ 8,524	$ 8,492
Accumulated amortization	(2,704)	(2,073)
Acquired intangible assets, net	$ 5,820	$ 6,419
Weighted-average life in years	13 years	13 years
Expected Future Amortization Expense
2025	$ 630
2026	627
2027	602
2028	586
2029	581
Thereafter	2,794
Total expected future amortization expense	5,820	$ 6,419
Customer Lists / User Relationships
Finite-Lived Intangible Assets [Abstract]
Cost	6,196	6,196
Accumulated amortization	(1,605)	(1,177)
Acquired intangible assets, net	$ 4,591	$ 5,019
Weighted-average life in years	14 years	14 years
Expected Future Amortization Expense
Total expected future amortization expense	$ 4,591	$ 5,019
Purchased Technology
Finite-Lived Intangible Assets [Abstract]
Cost	1,648	1,616
Accumulated amortization	(905)	(756)
Acquired intangible assets, net	$ 743	$ 860
Weighted-average life in years	8 years	8 years
Expected Future Amortization Expense
Total expected future amortization expense	$ 743	$ 860
Trade Names and Logos
Finite-Lived Intangible Assets [Abstract]
Cost	680	680
Accumulated amortization	(194)	(140)
Acquired intangible assets, net	$ 486	$ 540
Weighted-average life in years	13 years	13 years
Expected Future Amortization Expense
Total expected future amortization expense	$ 486	$ 540