Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Treasury Stock	Accumulated Other Comprehensive Loss	Retained Earnings
Beginning balance (in shares) at Jul. 31, 2018		258,616,000
Beginning balance at Jul. 31, 2018	$ 2,816	$ 3	$ 5,335	$ (11,050)	$ (36)	$ 8,564
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	1,557					1,557
Issuance of stock under employee stock plans, net of shares withheld for employee taxes (in shares)		4,019,000
Issuance of stock under employee stock plans, net of shares withheld for employee taxes	32		32
Stock repurchases under stock repurchase programs (in shares)		(2,455,000)
Stock repurchases under stock repurchase programs	(561)			(561)
Dividends and dividend rights declared	(500)					(500)
Share-based compensation expense	405		405
Issuance of common stock in a business combination	0
Ending balance (in shares) at Jul. 31, 2019		260,180,000
Ending balance at Jul. 31, 2019	3,749	$ 3	5,772	(11,611)	(36)	9,621
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	1,830				4	1,826
Issuance of stock under employee stock plans, net of shares withheld for employee taxes (in shares)		2,736,000
Issuance of stock under employee stock plans, net of shares withheld for employee taxes	(31)		(31)
Stock repurchases under stock repurchase programs (in shares)		(1,176,000)
Stock repurchases under stock repurchase programs	(318)			(318)
Dividends and dividend rights declared	(562)					(562)
Share-based compensation expense	438		438
Issuance of common stock in a business combination	$ 0
Ending balance (in shares) at Jul. 31, 2020	261,740,000	261,740,000
Ending balance at Jul. 31, 2020	$ 5,106	$ 3	6,179	(11,929)	(32)	10,885
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	2,070				8	2,062
Issuance of stock under employee stock plans, net of shares withheld for employee taxes (in shares)		2,593,000
Issuance of stock under employee stock plans, net of shares withheld for employee taxes	(187)		(187)
Stock repurchases under stock repurchase programs (in shares)		(2,422,000)
Stock repurchases under stock repurchase programs	(1,022)			(1,022)
Dividends and dividend rights declared	(651)					(651)
Share-based compensation expense	755		755
Issuance of stock in business combination (in shares)		11,324,000
Issuance of common stock in a business combination	$ 3,798		3,798
Ending balance (in shares) at Jul. 31, 2021	273,235,000	273,235,000
Ending balance at Jul. 31, 2021	$ 9,869	$ 3	$ 10,545	$ (12,951)	$ (24)	$ 12,296