Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Shares of Common Stock	Common Stock and Additional Paid-In Capital	Treasury Stock	Accumulated Other Comprehensive Loss	Retained Earnings
Beginning Balance (in shares) at Jul. 31, 2019		260,180
Beginning Balance at Jul. 31, 2019	$ 3,749,000		$ 5,775,000	$ (11,611,000)	$ (36,000)	$ 9,621,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	298,000				1,000	297,000
Issuance of stock under employee stock plans, net of shares withheld for employee taxes (in shares)		1,376
Issuance of stock under employee stock plans, net of shares withheld for employee taxes	19,000		19,000
Stock repurchases under stock repurchase programs (in shares)		(1,039)
Stock repurchases under stock repurchase programs	(278,000)			(278,000)
Dividends and dividend rights declared	(281,000)					(281,000)
Share-based compensation expense	220,000		220,000
Issuance of stock in business combination	0
Ending Balance (in shares) at Jan. 31, 2020		260,517
Ending Balance at Jan. 31, 2020	3,727,000		6,014,000	(11,889,000)	(35,000)	9,637,000
Beginning Balance (in shares) at Oct. 31, 2019		260,355
Beginning Balance at Oct. 31, 2019	3,633,000		5,881,000	(11,750,000)	(35,000)	9,537,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	240,000				0	240,000
Issuance of stock under employee stock plans, net of shares withheld for employee taxes (in shares)		686
Issuance of stock under employee stock plans, net of shares withheld for employee taxes	25,000		25,000
Stock repurchases under stock repurchase programs (in shares)		(524)
Stock repurchases under stock repurchase programs	(139,000)			(139,000)
Dividends and dividend rights declared	(140,000)					(140,000)
Share-based compensation expense	108,000		108,000
Ending Balance (in shares) at Jan. 31, 2020		260,517
Ending Balance at Jan. 31, 2020	3,727,000		6,014,000	(11,889,000)	(35,000)	9,637,000
Beginning Balance (in shares) at Jul. 31, 2020		261,740
Beginning Balance at Jul. 31, 2020	5,106,000		6,182,000	(11,929,000)	(32,000)	10,885,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	227,000				9,000	218,000
Issuance of stock under employee stock plans, net of shares withheld for employee taxes (in shares)		1,367
Issuance of stock under employee stock plans, net of shares withheld for employee taxes	$ (60,000)		(60,000)
Stock repurchases under stock repurchase programs (in shares)	(470)	(470)
Stock repurchases under stock repurchase programs	$ (175,000)			(175,000)
Dividends and dividend rights declared	(320,000)					(320,000)
Share-based compensation expense	292,000		292,000
Issuance of stock in business combination (in shares)		11,324
Issuance of stock in business combination	3,798,000		3,798,000
Ending Balance (in shares) at Jan. 31, 2021		273,961
Ending Balance at Jan. 31, 2021	8,868,000		10,212,000	(12,104,000)	(23,000)	10,783,000
Beginning Balance (in shares) at Oct. 31, 2020		262,707
Beginning Balance at Oct. 31, 2020	5,245,000		6,283,000	(11,929,000)	(35,000)	10,926,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	32,000				12,000	20,000
Issuance of stock under employee stock plans, net of shares withheld for employee taxes (in shares)		400
Issuance of stock under employee stock plans, net of shares withheld for employee taxes	(49,000)		(49,000)
Stock repurchases under stock repurchase programs (in shares)		(470)
Stock repurchases under stock repurchase programs	(175,000)			(175,000)
Dividends and dividend rights declared	(163,000)					(163,000)
Share-based compensation expense	180,000		180,000
Issuance of stock in business combination (in shares)		11,324
Issuance of stock in business combination	3,798,000		3,798,000
Ending Balance (in shares) at Jan. 31, 2021		273,961
Ending Balance at Jan. 31, 2021	$ 8,868,000		$ 10,212,000	$ (12,104,000)	$ (23,000)	$ 10,783,000