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, 2024	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023
Accounting Policies [Abstract]
Net income	$ 353	$ 168	$ 594	$ 208
Shares used in basic per share amounts:
Weighted-average common shares outstanding (in shares)	280	281	280	281
Shares used in diluted per share amounts:
Weighted-average common shares outstanding (in shares)	280	281	280	281
Dilutive common equivalent shares from stock options and restricted stock awards (in shares)	4	1	4	2
Dilutive weighted-average common shares outstanding (in shares)	284	282	284	283
Basic and diluted net income per share:
Basic net income per share (in dollars per share)	$ 1.26	$ 0.60	$ 2.12	$ 0.74
Diluted net income per share (in dollars per share)	$ 1.25	$ 0.60	$ 2.10	$ 0.73
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)	0	7	1	3