Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 100	$ 20	$ 328	$ 218
Other comprehensive income (loss), net of income taxes:
Unrealized gain (loss) on available-for-sale debt securities	(1)	0	(5)	(1)
Foreign currency translation gain (loss)	(4)	12	(5)	10
Total other comprehensive income (loss), net	(5)	12	(10)	9
Comprehensive income	$ 95	$ 32	$ 318	$ 227