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		6 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022
Accounting Policies [Abstract]
Net income	$ 168	$ 100	$ 208	$ 328
Shares used in basic per share amounts:
Weighted average common shares outstanding (in shares)	281	283	281	278
Shares used in diluted per share amounts:
Weighted average common shares outstanding (in shares)	281	283	281	278
Dilutive common equivalent shares from stock options and restricted stock awards (in shares)	1	4	2	4
Dilutive weighted average common shares outstanding (in shares)	282	287	283	282
Basic and diluted net income per share:
Basic net income (loss) per share (in dollars per share)	$ 0.60	$ 0.35	$ 0.74	$ 1.18
Diluted net income (loss) per share (in dollars per share)	$ 0.60	$ 0.35	$ 0.73	$ 1.16
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)	7	0	3	0