Description of Business and Summary of Significant Accounting Policies - Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Oct. 31, 2022	Oct. 31, 2021
Accounting Policies [Abstract]
Net income	$ 40	$ 228
Shares used in basic per share amounts:
Weighted average common shares outstanding (in shares)	281	273
Shares used in diluted per share amounts:
Weighted average common shares outstanding (in shares)	281	273
Dilutive common equivalent shares from stock options and restricted stock awards (in shares)	3	4
Dilutive weighted average common shares outstanding (in shares)	284	277
Basic and diluted net income per share:
Basic net income per share (in dollars per share)	$ 0.14	$ 0.84
Diluted net income per share (in dollars per share)	$ 0.14	$ 0.82
Shares excluded from diluted net income per share:
Weighted average stock options and restricted stock units that have been excluded from dilutive common equivalent shares outstanding due to their anti-dilutive effect (in shares)	3	0