Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 228	$ 198
Other comprehensive income (loss), net of income taxes:
Unrealized loss on available-for-sale debt securities	(4)	(1)
Foreign currency translation loss	(1)	(2)
Total other comprehensive loss, net	(5)	(3)
Comprehensive income	$ 223	$ 195