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Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 1,794	$ 1,464	$ 2,122	$ 1,682
Other comprehensive income (loss), net of income taxes:
Unrealized loss on available-for-sale debt securities	(5)	(2)	(10)	(3)
Foreign currency translation gain (loss)	(14)	1	(19)	11
Total other comprehensive income (loss), net	(19)	(1)	(29)	8
Comprehensive income	$ 1,775	$ 1,463	$ 2,093	$ 1,690

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