Description of Business and Summary of Significant Accounting Policies - Schedule of 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, 2025	Jan. 31, 2024	Jan. 31, 2025	Jan. 31, 2024
Numerator:
Net income	$ 471	$ 353	$ 668	$ 594
Shares used in basic per share amounts:
Weighted-average common shares outstanding (in shares)	280	280	280	280
Shares used in diluted per share amounts:
Weighted-average common shares outstanding (in shares)	280	280	280	280
Dilutive potential common equivalent shares from share-based awards (in shares)	3	4	3	4
Dilutive weighted-average common shares outstanding (in shares)	283	284	283	284
Basic and diluted net income per share:
Basic net income per share (in dollars per share)	$ 1.68	$ 1.26	$ 2.38	$ 2.12
Diluted net income per share (in dollars per share)	$ 1.67	$ 1.25	$ 2.36	$ 2.10
Shares excluded from diluted net income per share:
Weighted-average share-based awards that have been excluded from dilutive common equivalent shares outstanding due to their anti-dilutive effect (in shares)	0	0	0	1